US20020031798A1 - Antibody recognizing human 25-hydroxyvitamin D3-1a-hydroxylase - Google Patents
Antibody recognizing human 25-hydroxyvitamin D3-1a-hydroxylase Download PDFInfo
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- US20020031798A1 US20020031798A1 US09/878,262 US87826201A US2002031798A1 US 20020031798 A1 US20020031798 A1 US 20020031798A1 US 87826201 A US87826201 A US 87826201A US 2002031798 A1 US2002031798 A1 US 2002031798A1
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- Prior art keywords
- leu
- arg
- ala
- val
- pro
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Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/0004—Oxidoreductases (1.)
- C12N9/0071—Oxidoreductases (1.) acting on paired donors with incorporation of molecular oxygen (1.14)
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; CARE OF BIRDS, FISHES, INSECTS; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K2217/00—Genetically modified animals
- A01K2217/05—Animals comprising random inserted nucleic acids (transgenic)
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K38/00—Medicinal preparations containing peptides
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
- A61K39/00—Medicinal preparations containing antigens or antibodies
Definitions
- the present invention relates to a polypeptide having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity, DNA encoding the polypeptide, a recombinant DNA prepared by inserting the DNA in a vector, a transformant carrying the recombinant DNA, a method for preparing 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase by using the transformant, a method for preparing 1 ⁇ , 25-dihydroxyvitamin D 3 by using the polypeptide having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity and to an antibody recognizing the polypeptide.
- Active type vitamin D 3 has been known as a hormone having various biological actions such as the action of controlling calcium metabolism, the induction of cellular differentiation, and immunomodulation.
- active type vitamin D 3 is essentially 1 ⁇ , 25-dihydroxyvitamin D 3 wherein the positions 1 ⁇ and 25 have been hydroxylated.
- vitamin D 3 is firstly modified into 25-hydroxyvitamin D 3 by introducing a hydroxyl group into the position 25 and the position 1 ⁇ of the resulting 25-hydroxyvitamin D 3 is hydroxylated to form 1 ⁇ , 25-dihydroxyvitamin D 3 [All of vitamin D 3 , edited by Etsuro Ogata, Tateo Suda, and Yosuke Ogura, Kodansha Scientific, Co. (1993)].
- An object of the present invention is to provide a polypeptide having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity and a gene encoding the polypeptide.
- 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase catalyzes the final stage of vitamin D 3 activation, and is useful for prevention, diagnosis and therapeutic treatment of diseases such as osteoporosis induced by the decrease of active type vitamin D 3 .
- the present invention relates to a polypeptide having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity, DNA encoding the polypeptide, a recombinant DNA prepared by inserting the DNA in a vector, a transformant carrying the recombinant DNA, a method for producing 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase by using the transformant, a method for producing 1 ⁇ , 25-dihydroxyvitamin D 3 by using the polypeptide having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity and an antibody recognizing the polypeptide.
- FIG. 1 is an HPLC chart of the identified vitamin D 3 metabolites in cells to which pcMD3R or pcDNA3 is introduced, wherein “A” shows the results of the identification of vitamin D 3 metabolites in the cells to which pcMD3R is introduced; and “B” represents the results of vitamin D 3 metabolites in the cells to which pcDNA3 is introduced, wherein (1) represents 25-hydroxyvitamin D 3 ; (2) represents 24, 25-dihydroxyvitamin D 3 ; (3) represents 10-oxo-19-nor-25-hydroxyvitamin D 3 and (4) represents ⁇ , 25-dihydroxyvitamin D 3 .
- any polypeptide having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity may be used, for example including a polypeptide having an amino acid sequence selected from amino acid sequences represented by SEQ ID NOS. 1 and 2, or having an amino acid sequence in which one or more amino acid residues are deleted, substituted or added in the amino acid sequence of a polypeptide, the amino acid sequence being selected from amino acid sequences represented by SEQ ID NOS. 1 and 2, and having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity.
- polypeptide having an amino acid sequence in which one or more amino acid residues are deleted, substituted or added in the amino acid sequence, the amino acid sequence being selected from amino acid sequences represented by SEQ ID NOS. 1 and 2, and having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity may be prepared according to the method described in Nucleic Acids Research, 10, 6487 (1982); Proc. Natl. Acad. Sci., USA, 79, 6409 (1982); Proc. Natl. Acad.
- DNA of the present invention includes DNA encoding the polypeptide of the present invention, for example, DNA encoding the polypeptide having an amino acid sequence selected from amino acid sequences represented by SEQ ID NOS. 1 and 2, DNA encoding the polypeptide having an amino acid sequence in which one or more amino acid residues are deleted, substituted or added in the amino acid sequence selected from amino acid sequences represented by SEQ ID NOS. 1 and 2, and having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity, DNA comprising a nucleotide sequence selected from SEQ ID NOS. 3 and 4, or DNA hybridizable with these DNAs under stringent conditions.
- DNA hybridizable under stringent conditions means DNA recovered by using the DNA encoding the polypeptide having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity as a probe through colony hybridization, plaque hybridization or Southern blot hybridization or the like, specific example of which includes DNA identified by hybridization in the presence of 0.7 to 1.0 M NaCl at 65° C. by using a filter on which a DNA prepared from colonies or plaques is immobilized and then rinsing the filter at a condition of 65° C. by using 0.1 to 2 ⁇ SSC solutions (the composition of 1 ⁇ SSC solution is as follows; 150 mM NaCl and 15 mM sodium citrate).
- Hybridizable DNA includes for example DNA having homology of 60% or more, preferably 80% or more, more preferably 95% or more to the nucleotide sequence of the DNA encoding the polypeptide having an amino acid sequence selected from amino acid sequences represented by SEQ ID NOS. 1 and 2.
- the antibody of the present invention includes antibodies recognizing the polypeptide described above.
- mRNA (sometimes referred to as poly(A) + RNA] is prepared.
- Method for preparing such mRNA includes a method comprising preparing the whole RNA from the rat tissues and preparing then mRNA as poly(A) + RNA by using the oligo (dT) immobilized cellulose column method [Molecular Cloning, 2-nd edition]; a method comprising directly preparing mRNA from rat tissues by using kits such as Fast Track mRNA Isolation kit manufactured by Invitrogen, Co, and Quick Prep mRNA Purification Kit, manufactured by Pharmacia, Co. and the like.
- Method for preparing the whole RNA includes thiocyanate guanidine-trifluoroacetic acid cesium method [Methods in Enzymol., 154, 3 (1987)], AGPC method [Experimental Medicine, 9, 1937 (1991)] and the like.
- RNA and mRNA may be prepared from rat tissues with no induction of 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity by similar method described above.
- a cDNA library is prepared by a conventional method.
- Method for preparing the cDNA library includes for example a method for preparing a cDNA library, comprising synthesizing cDNA from the mRNA derived from the kidney resected from a rat with 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity induced, by using ZAP-cDNA synthesis kit manufactured by Stratagene, Co., cDNA Synthesis System manufactured by GIBCO BRL, Co. and the like, ligating then an adapter with a digestible site with an appropriate restriction enzyme, digesting a cloning vector ⁇ ZAP II with the restriction enzyme, and inserting the cDNA into the digested site of the cloning vector.
- any cloning vector capable of autonomously replicating in Escherichia coli K12 may be used.
- the cloning vector includes for example phage vector, plasmid vector and the like, preferably including ⁇ ZAP II described above, in addition to pUC18, pBluescript (Stratagene, Co.) and the like.
- any microorganism of species Escherichia coli may be used, preferably including Escherichia coli XL1-Blue, Escherichia coli XL2-Blue, Escherichia coli DH1, Escherichia coli MC1000 and the like.
- the region with the amino acid sequence includes for example adrenodoxin binding region (referred to as “Region A” hereinafter), heme binding region (referred to as “Region H” hereinafter) and the like.
- adrenodoxin binding region referred to as “Region A” hereinafter
- heme binding region referred to as “Region H” hereinafter
- a sense primer and an antisense primer are designed and prepared, which are appropriate for the amplification of the DNA encoding 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase by polymerase chain reaction (referred to as “PCR” hereinafter).
- Such primers include DNA comprising a nucleotide sequence selected from nucleotide sequences represented by SEQ ID NOS. 7, 8 and 9.
- first strand DNA is synthesized by reverse transcriptase reaction.
- DNA synthesis may be carried out using a cDNA synthetic kit manufactured by Stratagene, Co.
- RT reverse transcription
- PCR amplification is carried out between the RT-PCR amplified fragment and the 3-terminal poly(A) structure to recover a longer PCR amplified fragment additionally containing the noncoding region on 3′ side.
- a PCR amplified fragment containing the 3′ noncoding region can be recovered by synthesizing cDNA using the mRNA recovered in 1) and the oligo dT/AUAP primer in the 3′ RACE system kit manufactured by BRL, CO. and conducting PCR amplification using the DNA as a template and using the AUAP primer in the 3′ RACE system kit manufactured by BRL and the RT-PCR amplified fragment.
- the amplified DNA fragment is a partial fragment of the DNA encoding 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase by the following method.
- Poly(A) + RNAs derived from a rat induced with 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity and a non-induced rat are individually subject to agarose electrophoresis, and the poly(A) + RNAs electrophoresed are then individually transferred onto each membrane filter in a conventional manner.
- the amplified DNA fragment is hybridizable only when using the membrane filter prepared from the poly(A) + RNA derived from the rat induced with the activity, it is revealed that the DNA fragment is a partial fragment of the DNA encoding 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase.
- the amplified DNA fragment is then inserted into a plasmid, and the resulting plasmid can be used for nucleotide sequencing and the assay of expression specificity.
- the method for inserting the fragment into a plasmid includes a method for inserting the fragment into a plasmid, comprising extracting the amplified DNA fragment from the agarose using a DNA purification kit (manufactured by Bio Rad Co.) and ligating the fragment with a vector pCRII (manufactured by Invitrogen, Co.).
- a cDNA library is screened by labeling the amplified DNA fragment and subjecting the resulting fragment to colony- or plaque hybridization in a conventional manner.
- the labeling of the amplified DNA fragment can be carried out using for example DIG labeling kit (#1 175 033, manufactured by Boehringer Mannheim, Co.). More specifically, a DIG-labeled amplified DNA fragment can be recovered by PCR using the amplified DNA fragment as a template and utilizing the kit.
- DIG labeling kit #1 175 033, manufactured by Boehringer Mannheim, Co.
- the plaque hybridization method includes for example the following method.
- the cDNA library (phage) prepared in 1) above is spread on an agar culture medium and cultivated to a final concentration of 10,000 to 20,000 plaques per one petri dish.
- Hybond N + membrane manufactured by Amersham, Co. is placed on the petri dish with plaques formed thereon to transfer the plaque DNA onto the membrane.
- the transfer membrane is subject to alkali treatment (comprising for example immersing the membrane in 1.5 M NaCl, 0.5 M NaOH solution) and SDS treatment (comprising for example immersing in 2 ⁇ SSC, 0.1% SDS solution), rinsing and drying, and the resulting membrane is used for hybridization as a blotted membrane with the plaque DNA immobilized thereon.
- alkali treatment comprising for example immersing the membrane in 1.5 M NaCl, 0.5 M NaOH solution
- SDS treatment comprising for example immersing in 2 ⁇ SSC, 0.1% SDS solution
- the blotted membrane is immersed in a hybridization solution [5 ⁇ SSC, 0.1% Sarkosyl, 0.02% SDS, 1% blocking reagent for hybridization (manufactured by Boehringer Mannheim, Co.)] for 5 hours, and the labeled amplified DNA fragment which has been subjected to thermal treatment is added thereto for hybridization.
- a hybridization solution [5 ⁇ SSC, 0.1% Sarkosyl, 0.02% SDS, 1% blocking reagent for hybridization (manufactured by Boehringer Mannheim, Co.)] for 5 hours, and the labeled amplified DNA fragment which has been subjected to thermal treatment is added thereto for hybridization.
- the membrane is subject to rinsing [for example, rinsing twice in 2 ⁇ SSC and 0.1% SDS at room temperature for 5 minutes, and rinsing twice in 0.1 ⁇ SSC and 0.1% SDS at 60° C. for 15 minutes] and blocking [for example, blocking in 1 ⁇ blocking solution (manufactured Boehringer Mannheim Co.), 0.1 M maleic acid, 0.15 M NaCl, pH 7.5], and thereafter, the labeled amplified DNA is detected by a variable method, depending on the labeling mode of the labeled amplified DNA fragment, whereby an objective clone can be selected.
- rinsing for example, rinsing twice in 2 ⁇ SSC and 0.1% SDS at room temperature for 5 minutes, and rinsing twice in 0.1 ⁇ SSC and 0.1% SDS at 60° C. for 15 minutes
- blocking for example, blocking in 1 ⁇ blocking solution (manufactured Boehringer Mannheim Co.), 0.1 M maleic acid, 0.15 M Na
- a DNA fragment labeled with DIG is used, for example, reaction with anti-DIG antibody labeled with AP and subsequent alkali treatment [for example, immersing in 0.1 M Tris-HCl (pH 9.5), 0.1 M NaCl and 50 mM MgCl 2 solution] are carried out, and a plaque hybridized with the probe is screened on an X-ray film using a DIG luminescence detection kit (#1 363 514, manufactured by Boehringer Mannheim, Co.) to select a clone containing DNA encoding 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase.
- DIG luminescence detection kit #1 363 514, manufactured by Boehringer Mannheim, Co.
- DNA is isolated in a conventional manner to recover DNA encoding 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase.
- DNA nucleotide sequencing can be done by common nucleotide sequencing methods, for example, the dideoxy method by Sanger et. al. [Proc. Natl. Acad. Sci. USA, 74, 5463 (1977)] or by sequencing by using a nucleotide sequencer such as 373A.DNA sequencer [manufactured by Perkin Elmer, Co.].
- the gene sequence of 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase thus determined includes DNA comprising the sequence represented by SEQ ID NO. 3 or 5.
- an objective DNA may be prepared by chemical synthesis with a DNA sequencer.
- a DNA sequencer includes a DNA sequencer based on the thiophosphite method, manufactured by Shimadzu, and a DNA sequencer Model 1392 based on the phosphoramidits method, manufactured by Perkin Elmer, Co.
- the rat-derived 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase gene as recovered above can be used to recover 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase gene derived from other animals, for example, humans, by the following method.
- the DNA encoding 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase as recovered above is labeled with ⁇ - 32 P-dCTP by using for example Megaprime DNA labeling kit (manufactured by Amersham Co.).
- a cDNA library is prepared from objective animal tissues, for example human kidney.
- the cDNA library is screened by colony- or plaque hybridization using the labeled DNA fragment described in 4) above as a probe.
- the objective DNA is isolated by the method as described in 5) above, and the nucleotide sequence is determined.
- the nucleotide sequence having high homology to the nucleotide sequence of the gene of rat 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase is defined as DNA encoding 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase derived from the objective animal.
- the gene includes for example human kidney-derived DNA comprising the sequence represented by SEQ ID NO. 4 or 6.
- DNA recovered in 5) is modified into DNA fragments with appropriate lengths so that the DNA encoding 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase might be contained therein, by using restriction enzymes or DNases, which are then inserted into the downstream of a promoter in an expression vector, and then, the expression vector with the DNA inserted therein is introduced into a host cell appropriate for the expression vector.
- Any host cell capable of expressing the objective gene may be used, including for example bacteria, yeast, animal cells and insect cells.
- a vector which is autonomously replicable in the host cell or possibly inserted into the chromosome and contains a promoter at the site on which the gene of 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase can be transcribed, may be used.
- an expression vector of 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase gene is autonomously replicable in the procaryotic cells and the vector is composed of a promoter, a ribosome binding sequence, DNA encoding 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase and a transcription termination sequence.
- a gene regulating the promoter may be contained in the vector.
- Such expression vector includes for example pBTrp2, pBTacl, pBTac2 (all commercially available from Boehringer Mannheim, Co.), pKK2-2 (manufactured by Pharmacia, Co.) pSE280 (manufactured by Invitrogen, Co.), pGEMEX-1 (manufactured by Promega, Co.), pQE-8 (manufactured by QIAGEN, Co.), pKYP10 (Japanese Published Unexamined Patent Application No. 110600/1983), pKYP200 [Agric. Biol. Chem., 48, 669 (1984)], pLSA1 [Agric, Biol.
- Any promoter which can be expressed in host cells such as Escherichia coli may be used, including for example promoters derived from Escherichia coli and phages, for example trp promoter (Ptrp), lac promoter (Plac), P L promoter, P R promoter, PletI promoter, and P SE promoter; SPO1 promoter, SPO2 promoter, penP promoter and the like. Additionally, artificially designed and modified promoters, such as a promoter of two Ptrp's in series (Ptrp ⁇ 2) and tac promoter may be used.
- promoters derived from Escherichia coli and phages for example trp promoter (Ptrp), lac promoter (Plac), P L promoter, P R promoter, PletI promoter, and P SE promoter; SPO1 promoter, SPO2 promoter, penP promoter and the like.
- artificially designed and modified promoters such as a promoter of two Ptr
- Any ribosome binding sequence may be used, as long as the sequence may be expressed in host cells such as Escherichia coli.
- a plasmid wherein the distance between the Shine-Dalgarno sequence and the initiation codon is adjusted to an appropriate distance (for example, 6 to 18 nucleotides) may be used.
- a transcription termination sequence is not necessarily required, but preferably, a transcription termination sequence is arranged immediately below the structural gene.
- Examples of the host cell include microorganisms belonging to the genus Escherichia, Serratia, Bacillus, Brevibacterium, Corynebacterium, Microbacterium, Pseudomonas, and the like.
- Escherichia coli XL1-Blue Escherichia coli XL2-Blue
- Escherichia coli DH1 Escherichia coli MC1000
- Escherichia coli KY3276 Escherichia coli W1485, Escherichia coli JM109, Escherichia coli HB101
- Escherichia coli No.49 Escherichia coli W3110, Escherichia coli NY49
- Seratia ficaria Seratia fonticola
- Seratia liquefaciens Seratia marcescens
- Bacillus subtilis Bacillus amyloliguefaciens
- Brevibacterium ammoniagenes Brevibacterium immariophilum ATCC 14068, Brevibacterium saccharolyticum ATCC 14066, Corynebacterium glutamicum ATCC 13032, Corynebacterium glutamicum ATCC 14067, Corynebacterium glutamicum ATCC 13869
- any method for introducing DNA into the host cells may be used, including for example a method comprising the use of calcium ion [Proc. Natl. Acad. Sci. USA, 69, 2110 (1972)], protoplast method (Japanese Published Unexamined Patent Application No. 2483942/1988), and methods described in Gene, 17, 107 (1982) and Molecular & General Genetics, 168, 111 (1979).
- expression vectors for example YEp13 (ATCC 37115), YEp24 (ATCC 37051), YCp50 (ATCC 37419), pHS19, and pHS15 may be used.
- any promoter which can be expressed in yeast bacterial strains may be used.
- promoters such as PHO5 promoter, PGK promoter, GAP promoter, ADH promoter, gal 1 promoter, gal 10 promoter, heat shock protein promoter, MF ⁇ 1 promoter, CUP 1 promoter and the like may be listed.
- Host cells used include for example Saccharomyces cerevisae, Shizosaccharomyces pombe, Kluyveromyces lactis, Trichosporon pullulans, and Schwanniomyces alluvius.
- any method for introducing DNA into yeast cells may be used, for example, electroporation method [Methods. Enzymol., 194, 182 (1990)], spheroplast method [Proc. Natl. Acad. Sci. USA, 84, 1929 (1978)], lithium acetate method [Journal of Bacteriology, 153, 163 (1983)], a method described in Proc. Natl. Acad. Sci. USA, 75, 1929 (1978) and the like.
- the expression vector includes for example pcDNAI, pcDM8 (commercially available from Funakoshi, Co.), pAGE107 (Japanese Published Unexamined Patent Application No. 22979/1991; Cytotechnology, 3, 133 (1990)), pAS3-3 (Japanese Published Unexamined Patent Application No. 227075/1990), pCDM8 [Nature, 329, 840 (1987)], pcDNAI/Amp (manufactured by Invitrogen, Co.), pREP4 (manufactured by Invitrogen, Co.), pAGE103 [J. Biochem., 101, 1307 (1987)], and pAGE210.
- pcDNAI Japanese Unexamined Patent Application No. 22979/1991; Cytotechnology, 3, 133 (1990)
- pAS3-3 Japanese Unexamined Patent Application No. 227075/1990
- pCDM8 [Nature, 329, 840 (1987)]
- any promoter which can be expressed in animal cells may be used, including for example a promoter of IE (immediate early) gene of cytomegalovirus (human CMV), an early promoter of SV40 or a promoter of metallothionein, a promoter retrovirus, a heat shock promoter and an SR ⁇ promoter.
- IE immediate early gene of cytomegalovirus
- human CMV cytomegalovirus
- the enhancer of the IE gene of human CMV may be used in combination with such promoter.
- Examples of the host cell include Namalwa cell, monkey cos cell, Chinese hamster CHO cell, HST5637 (Japanese Published Unexamined Patent Application No.299/1988) and the like.
- any method for introducing DNA into animal cells may be used, e.g., electroporation method [Cytotechnology, 3, 133 (1990)], calcium phosphate method [Japanese Published Unexamined Patent Application No. 227075/1990], lipofection method [Proc. Natl. Acad. Sci., USA, 84, 7413 (1987)] and the method described in Virology, 52, 456 (1973)].
- electroporation method [Cytotechnology, 3, 133 (1990)]
- calcium phosphate method Japanese Published Unexamined Patent Application No. 227075/1990
- lipofection method Proc. Natl. Acad. Sci., USA, 84, 7413 (1987)
- the preparation of a transformant and cultivation of the transformant may be carried out according to the method described in Japanese Published Unexamined Patent Application No. 227075/1990 or Japanese Published Unexamined Patent Application No. 257891/1990.
- the protein may be expressed according to the methods described in Baculovirus Expression Vectors, A Laboratory Manual, W. H. Freeman and Company, New York, 1992; Current Protocols in Molecular Biology, Supplement 1-38(1987-1997); Bio/Technology, 6, 47 (1988) and the like.
- the protein can be expressed by co-introduction of the transfer vector containing interest gene and helper DNA fragment of baculovirus into an insect cell to recover a recombinant virus in the supernatant of the culture of the insect cell and infecting an insect cell with the recombinant virus.
- the transfer vector for gene introduction to be used in the method includes for example pVL1392, pVL1393, pBlueBacIII (all manufactured by Invitrogen, Co.) and the like.
- helper DNA fragment of baculovirus for example, Autographa californica nuclear polyhedrosis virus, which is a virus infecting insects of the family Barathra, may be used.
- the method for co-introducing the above-described transfer vector containing interest gene and the helper DNA fragment of baculovirus into insect cells to prepare the recombinant virus includes for example calcium phosphate method (Japanese Published Unexamined Patent Application No. 227075/1990), lipofection method [Proc. Natl. Acad. Sci. USA, 84, 7413 (1987)], and the like.
- the transformant thus obtained is cultivated in a culture medium to form polypeptide of the present invention in the culture, and the formed polypeptide is recovered from the culture, whereby the polypeptide of the present invention can be produced.
- the transformant of the present invention is cultivated in a culture medium according to a conventional method for use in cultivating hosts.
- any natural culture medium or any synthetic culture medium may be used, so long as it contains carbon sources, nitrogen sources, inorganic salts and the like which can be assimilated by the organisms.
- Any carbon source which can be assimilated by the organisms may be used, including carbohydrates such as glucose, fructose, sucrose, molasses containing them, starch and starch hydrolysates; organic acids such as acetic acid and propionic acid; alcohols such as ethanol and propanol.
- ammonia As such nitrogen sources, ammonia; ammonium salts of inorganic acids or organic salts, such as ammonium chloride, ammonium sulfate, ammonium acetate, and ammonium phosphate; other nitrogen containing compounds; peptone; meat extract; yeast extract; corn steep liquor; casein hydrolysates; soy bean meal; soybean meal hydrolysates; various fermentation products, and digested products thereof, may be used.
- potassium dihydrogen phosphate dipotassium hydrogen phosphate, magnesium phosphate, magnesium sulfate, sodium chloride, ferrous sulfate, manganese sulfate, copper sulfate, calcium carbonate and the like, may be used.
- Cultivation is generally carried out under aerobic conditions, for example, by shaking culture or spinner culture under aeration.
- the cultivation is carried out at 15 to 40° C. for 16 hours to seven days at pH 3.0 to 9.0.
- the pH is adjusted with an inorganic or organic acid, an alkali solution, urea, calcium carbonate, ammonia and the like.
- antibiotics such as ampicillin and tetracycline may be added to the culture medium, if necessary.
- an inducer may be added to the culture medium, if necessary.
- an expression vector prepared using lac promoter for example, isopropyl- ⁇ -D-thiogalactopyranoside may be added to the medium; for cultivating microorganisms transformed with an expression vector prepared using trp promoter, for example, indole acrylic acid may be added to the medium.
- RPMI 1640 culture medium [The Journal of the American Medical Association, 199, 519 (1967)], Eagle's MEM culture medium [Science, 122, 501 (1952)], Dulbecco's modified MEM culture medium [Virology, 8, 396 (1959)], DMEM culture medium (manufactured by GIBCO BRL, Co.), 199 culture medium [Proceedings of the Society for the Biological Medicine, 73, 1 (1950)] for conventional use or culture media prepared by adding fetal calf serum and the like to these culture media, may be used.
- cultivation is carried out in the presence of 5% CO 2 at pH 6 to 8 at 30 to 40° C. for 1 to 7 days.
- antibiotics such as kanamycin and penicillin may be added to the culture medium.
- culture medium for general use such as TNM-FH culture medium [manufactured by Pharmingen, Co.], Sf-900 II SFM culture medium [manufactured by Life Technologies, Co.], ExCell 400, ExCell 405 [both manufactured by JRH Biosciences, Co.], Grace's Insect Medium [Grace, T. C. C. , Nature, 195, 788 (1962)] and the like, may be used.
- Cultivation is carried out at pH 6 to 7 at 25 to 30° C. for 1 to 5 days.
- antibiotics such as gentamycin may be added to the culture medium.
- polypeptide of the present invention When the polypeptide of the present invention is expressed in cells at its dissolved state, a purified sample of the polypeptide is obtained as follows. The cells are recovered through centrifugation after the cultivation, suspended in an aqueous buffer, and disrupted by means of ultrasonic oscillator, French Press, Manton Gaulin homogenizer, Dynomill and the like, to recover a cell-free extract.
- a purified sample can be recovered by conventional isolation and purification methods of enzymes, singly or in combination, such as solvent extraction method, salting out methods with ammonium sulfate, etc., desalting method, precipitation methods with organic solvents, anion exchange chromatography by means of resins such as diethylaminoethyl (DEAE)-Sepharose, DIAION HPA-75 (manufactured by Mitsubishi Chemical Corporation); cation exchange chromatography by means of resins such as S-Sepharose FF (manufactured by Pharmacia, Co.); hydrophobic chromatography using resins such as butyl Sepharose and phenyl Sepharose; gel filtration methods using molecular sieves; affinity chromatography method; chromato-focusing method; electrophoresis methods such as isoelectric focusing; and the like.
- solvent extraction method salting out methods with ammonium sulfate, etc.
- desalting method precipitation methods with organic solvents
- polypeptide When the polypeptide is expressed in cells in the form of an inclusion body, a purified sample of the polypeptide is obtained as follows. The cells are similarly recovered, disrupted, and centrifuged to recover a precipitation fraction, from which the polypeptide is recovered according to a conventional method, and the inclusion body of the polypeptide is solubilized with a polypeptide denaturant.
- the solubilized solution is diluted or dialyzed in a dilute solution at such an extent that the resulting solution does not contain any polypeptide denaturant or the polypeptide is not any more denatured at the concentration of the polypeptide denaturant, to renature the polypeptide into a normal steric configuration, from which a purified sample can be recovered according to the same isolation and purification method as described above.
- the polypeptide of the present invention or derivatives thereof such as a sugar modified product thereof are secreted extracellularly
- the polypeptide or the derivatives thereof can be recovered from the culture supernatant. More specifically, the culture is treated by the method as described above, such as centrifugation, to recover a soluble fraction, and from the fraction, a purified sample is recovered using the isolation and purification method as described above.
- polypeptide expressed by the above method may be prepared by chemical synthetic methods such as Fmoc method (fluorenylmethyloxycarbonyl method), tBoc method (t-butyloxycarbonyl method) and the like.
- the polypeptide can be prepared by utilizing peptide synthesizers commercially available from Sowa Trade (manufactured by Advanced chemTech, Co., USA), Perkin-Elmer Japan (manufactured by Perkin-Elmer, Co., USA), Pharmacia Biotech (manufactured by PharmaciaBiotech, Co., Sweden), Aroka (manufactured by Protein Technology Instrument, Co., USA), KURABO (manufactured by Synthecell-Vega, Co., USA), Japan PerSeptive Limited (manufactured by PerSeptive, Co., USA), Shimadzu, Co. and the like.
- Sowa Trade manufactured by Advanced chemTech, Co., USA
- Perkin-Elmer Japan manufactured by Perkin-Elmer, Co., USA
- Pharmacia Biotech manufactured by PharmaciaBiotech, Co., Sweden
- Aroka manufactured by Protein Technology Instrument, Co., USA
- KURABO manufactured by Synthecell-Vega, Co., USA
- the polypeptide having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase and 25-hydroxyvitamin D 3 are put in an aqueous medium to form 1 ⁇ , 25-dihydroxyvitamin D 3 in the aqueous medium, and the formed 1 ⁇ , 25-dihydroxyvitamin D 3 is recovered from the aqueous medium.
- 1 ⁇ , 25-dihydroxyvitamin D 3 can be produced.
- polypeptide having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity the polypeptide purified by the method described above in 6) and the microbial culture obtained by the method described above in 6) or a treated product of the culture obtained by treating the culture in various ways and the like, may be used.
- Examples of the treated product of the culture broth include a concentrated product of the culture, a dried product of the culture, a culture supernatant obtained by centrifuging the culture, a concentrated product of the culture supernatant, an enzyme preparation obtained from the culture supernatant, cells (including microbial cells) obtained by centrifuging the culture, a dried product of the cells, a freeze-dried product of the cells, a surfactant-treated product of the cells, an ultrasonic-treated product of the cells, a mechanically disrupted product of the cells, a solvent-treated product of the cells, an enzyme-treated product of the cells, a protein fraction of the cells (fractions having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity), an immobilized product of the cells and an enzyme preparation obtained by extraction from the cells.
- cells including microbial cells obtained by centrifuging the culture, a dried product of the cells, a freeze-dried product of the cells, a surfactant-treated product of the cells, an ultrasonic-
- the concentration of the polypeptide having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity is 0.01 to 50 g/l, preferably 0.05 to 10 g/l, as wet cells.
- the aqueous medium includes water, buffers such as phosphate salts, carbonate salts, acetate salts, borate salts, citrate salts, and Tris; and aqueous solutions containing organic solvents such as alcohols such as methanol and ethanol; esters such as ethyl acetate; ketones such as acetone; amides such as acetoamide.
- organic solvents such as alcohols such as methanol and ethanol; esters such as ethyl acetate; ketones such as acetone; amides such as acetoamide.
- surfactants such as Triton X-100 (manufactured by Nakarai Tesque, Co.) and Nonion HS204 (manufactured by Nippon Oils and Fats Co.), or organic solvents such as toluene and xylene may be added at about 0.1 to 20 g/l.
- the concentration of 25-hydroxyvitamin D 3 is 0.01 to 50 g/l, preferably 0.01 to 10 g/l.
- 1 ⁇ , 25-dihydroxyvitamin D 3 can be produced by adding polypeptide having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity and 25-hydroxyvitamin D 3 .
- the reaction is carried out at 15 to 80° C., preferably 20 to 40° C., at pH 3 to 11, preferably pH 4 to 9, for 5 minutes to 96 hours.
- a purified product of the whole length or a partial fragment of the protein obtained by the method described in the above in 6) or a peptide having a partial amino acid sequence of the protein of the present invention is used as the antigen.
- the antigen is administered to animal by subcutaneous, intravenous or intraperitoneal injection together with an appropriate adjuvant (for example, complete Freund's adjuvant, aluminum hydroxide gel, pertussis vaccine, or the like).
- an appropriate adjuvant for example, complete Freund's adjuvant, aluminum hydroxide gel, pertussis vaccine, or the like.
- mice [0129]
- mice [0129] Examples of the animals used include rabbits, goats, 3- to 20-weak-old rats, mice, hamsters and the like.
- Preferable dosage of antigen is 50 to 100 ⁇ g per animal.
- a peptide when used as the antigen, it is preferred to use the peptide as the antigen after binding it covalently to a carrier protein, such as keyhole limpet haemocyanin, bovine thyroglobulin or the like.
- a carrier protein such as keyhole limpet haemocyanin, bovine thyroglobulin or the like.
- the peptide used as the antigen can be synthesized using a peptide synthesizer.
- Administration of the antigen is carried out 3 to 10 times at one- to two-week intervals after the first administration.
- a blood sample is recovered from the fundus of the eye 3 to 7 days after each administration, and the serum is tested, for example, by enzyme immunoassay (Enzyme-linked Immunosorbent Assay (ELISA), published by Igaku Shoin (1976); Antibodies—A Laboratory Manual, Cold Spring Harbor Laboratory (1988)) as to whether it is reactive with the antigen used for immunization.
- ELISA Enzyme-linked Immunosorbent Assay
- a non-human mammal whose serums shows a sufficient antibody titer against the antigen used for immunization is submitted for use as the supply source of serum or antibody producing cells.
- a polyclonal antibody can be prepared by isolating and purifying it from the serum.
- a monoclonal antibody can be prepared by preparing a hybridoma through fusion of the antibody producing cells with myeloma cells of anon-humanmammal and culturing the hybridoma, or administering the hybridoma to an animal to induce ascites tumor in the animal, and then isolating and purifying it from the culture medium or ascitic fluid.
- Examples of the antibody producing cells include spleen cells, lymph nodes and antibody producing cells in peripheral blood. Particularly, spleen cells are preferred.
- Examples of the myeloma cells include cell lines derived from mouse, such as P3-X63Ag8-U1 (P3-U1) cell line [Current Topics in Microbiology and Immunology, 18, 1-7 (1978)], P3-NS1/1-Ag41 (NS-1) cell line [European J. Immunology, 6, 511-519 (1976)], SP2/O-Ag14 (SP-2) cell line [Nature, 276, 269-270 (1978)], P3-X63-Ag8653 (653) cell line [J.
- Hybridoma cells can be prepared in the following manner.
- Antibody producing cells and myeloma cells are fused, suspended in HAT medium (normal medium supplemented with hypoxanthine, thymidine and aminopterin) and then cultured for 7 to 14 days. After the culturing, a portion of the culture supernatant is sampled and tested, for example, by enzyme immunoassay to select those which can react with the antigen but not with protein which does not contain the antigen. Thereafter, cloning is carried out by limiting dilution analysis, and a hybridoma which shows stable and high antibody titer by enzyme immunoassay is selected as monoclonal antibody producing hybridoma cells.
- HAT medium normal medium supplemented with hypoxanthine, thymidine and aminopterin
- centrifugation ammonium sulfate precipitation, caprylic acid precipitation, or chromatography using a DEAE-Sepharose column, an anion exchange column, a protein A or G column, a gel filtration column and the like may be employed alone or as a combination thereof.
- the polypeptide of the present invention can be utilized for producing 1 ⁇ , 25-dihydroxyvitamin D 3 as active type vitamin D 3 .
- the whole length or partial fragments of the polypeptide of the present invention can be utilized as an antigen against the antibody recognizing 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase.
- the mRNA of 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase gene can be detected by Northern hybridization method (Molecular Cloning, 2-nd edition), PCR method [PCR Protocols, Academic Press (1990)], and RT-PCR method and the like.
- the diagnostic method for assaying the expression level of the mRNA of the gene of 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase by utilizing the detection method is useful for suppressing the onset of adult diseases such as osteoporosis induced by the decrease of active type vitamin D 3 and is also effective for early diagnosis of genetic diseases due to congenital deficiency of the 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase gene.
- the expression level of mRNA is assayed on the basis of the label of a probe hybridized, for example, on the basis of the radioactivity in case of labeling with for example 32 P or the fluorescence in case of fluorescent labeling.
- the expression level of mRNA is assayed, on the basis of the fluorescence of a DNA specific fluorescent dye, for example ethidium bromide and Cyber Green 1 which is used for staining amplified fragments.
- the DNA of the present invention is inserted into virus vectors such as retrovirus and adenovirus and other vectors, and the resulting DNA can be used for therapeutic treatment according to gene therapy.
- the anti-25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase antibody of the present invention 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase can be detected and assayed in samples of blood, some organs, cells and the like.
- Specifically preferable methods therefor include ELISA method by using microtiter plates, fluorescent antibody methods, Western blot method and the like; additionally, immuno-histological staining by using pathological sections may also be utilized.
- the antibody of the present invention is useful for the diagnosis of diseases such as osteoporosis, due to the decrease of the expression of vitamin D 3 -1 ⁇ -hydroxylase, the diagnosis of the onset thereof and early prediction of the possibility of the onset thereof and the like.
- the antibody is also useful as a laboratory reagent for research works for the protein.
- polypeptides having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity are immuno-histologically stained, and thus, an immuno-histological staining agent containing the antibody can be provided.
- the DNA in the promoter region of the gene can be cloned.
- molecules involved in the regulation of the expression of the gene can be screened and analyzed.
- DIET 11 [Suda, et. al., J. Nutrition, 100, 1049 (1970); commercially available as Purified diet for Rat from Teklad Co, Madison, Wis., USA] was used as the vitamin D 3 deficient diet.
- the diet was vitamin D deficient and low calcium diet at a calcium content of 0.03% and a phosphate content of 0.6%.
- the rats were anesthetized with ether. From the abdominal aortas of the rats, blood was drawn out, and then, the rats were sacrificed to death by phlebotomy and immediately thereafter, the rats were autopsied to resect the kidneys.
- kidneys were rinsed in PBS [containing NaCl (8 g), KCl (0.2 g), NaH .2 PO 4 12H 2 O (2.9 g) and KH 2 PO 4 (0.2 g) per one liter), and the resulting kidneys were frozen in liquid nitrogen.
- PBS containing NaCl (8 g), KCl (0.2 g), NaH .2 PO 4 12H 2 O (2.9 g) and KH 2 PO 4 (0.2 g) per one liter
- rats were given normal diet (Rat diet containing calcium (0.5 g), phosphate (0.6 g) and vitamin D 3 (200 IU) per 100 g) in a similar fashion, and then, the kidneys were prepared by the same method as described above. The resulting kidneys were used as kidneys from rats with no activity induction.
- the sand-like tissues were homogenized in ice cooling with a homogenizer (Digital Homogenizer; manufactured by Inouchi, Co.), while adding thereto 35 ml of 5.5 M GTC solution (containing 324.5 g of guanidine isothiocyanate, 3.7 g of sodium citrate, and 3.3 g of Sarkosyl in 500 ml) and 492 ⁇ l of 2-mercaptoethanol, and the homogenate in suspension was passed four times through an injection needle of gauge 18 arranged on a 50-ml injection cylinder.
- a homogenizer Digital Homogenizer; manufactured by Inouchi, Co.
- the suspension was then transferred into a 15-ml centrifuge tube, for centrifugation at 6,000 rpm at 20° C. for 10 minutes, to recover the supernatant.
- the supernatant was then overlaid in 16-ml portions on a CsTFA preparative solution [a mixture solution of CsTFA solution (100 ml) manufactured by Pharmacia, Co., 82.06 ml of 0.25 M EDTA solution (pH 7.0), and 23.09 ml of H 2 O] in a 40-ml polyallomer tube for ultracentrifugation, and the tube was then ultra-centrifuged under conditions of 25,000 rpm and 18° C. for 25 hours.
- a CsTFA preparative solution a mixture solution of CsTFA solution (100 ml) manufactured by Pharmacia, Co., 82.06 ml of 0.25 M EDTA solution (pH 7.0), and 23.09 ml of H 2 O
- the tube was cut at the position of about 1.5 cm from the bottom of the tube, and the resulting precipitate was dissolved in 0.6 ml of 4M GTC solution [a mixture solution of 5.5M GTC solution (4 ml), 1.5 ml of H 2 O, and 56 ⁇ l of 2-mercaptoethanol].
- the precipitate was rinsed in 70% ethanol, suspended in 1 ml of TE buffer [10 mM Tris-HCl (pH 8.0), 1 mM EDTA-NaOH (pH 8.0)], and centrifuged at 14,000 rpm for 15 seconds, to recover the supernatant.
- TE buffer 10 mM Tris-HCl (pH 8.0), 1 mM EDTA-NaOH (pH 8.0)
- the precipitate was rinsed in 70% ethanol and was then dissolved in 500 ⁇ l of TE buffer.
- RNA was recovered from the kidneys from the rats with activity induction and the rats with no activity induction, which was calculated as 639 ⁇ g and 918 ⁇ g, respectively, on the basis of the absorbance at 260 nm.
- RNA solution 150 ⁇ l derived from the rats with activity induction was effected with thermal treatment at 65° C. for 5 minutes, which was immediately cooled in ice.
- the cellulose was packed in a column, through which the TE/NaCl solution was passed for washing the column, followed by elution of mRNA with TE solution of 0.5 ml, to fractionate and collect the eluate in 200 ⁇ l-fractions.
- the cDNA fragment was inserted into the EcoRI-XhoI site of ⁇ ZAP II, and by subsequent packaging with Giga pack Gold Packaging Kit (manufactured by Stratagene, Co.) and infection by using Escherichia coli host XL1-Blue, MRF′ strain and helper phage VCS257, a cDNA library was constructed.
- DNA comprising the nucleotide sequence represented by SEQ ID No. 7 corresponding to the region A was used as the sense primer; and DNA comprising the nucleotide sequence represented by SEQ ID NO. 8 corresponding to the region H was used as the antisense primer.
- the DNA comprising the nucleotide sequence represented by SEQ ID NO. 7 as the sense primer and the DNA comprising the nucleotide sequence represented by SEQ ID NO. 8 as the antisense primer was effected.
- PCR was effected at 35 cycles, each cycle composed of 94° C. for 30 seconds, 42° C. for one minute and 72° C. for one minute.
- the reaction product was analyzed by agarose gel electrophoresis, and a 255-bp amplification fragment (AH fragment) was observed.
- AH fragment a 255-bp amplification fragment
- the fragment was extracted from agarose, which was then inserted into pCRII vector (manufactured by Invitrogen, Co.).
- RNAs derived from the rats induced with 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity and the non-induced rats were prepared poly(A) + RNAs, which were then subject individually to agarose electrophoresis, to transfer the electrophoresed mRNAs onto membrane filters in a conventional manner.
- the amplified AH fragment was hybridized only when the membrane filter prepared from the mRNA derived from the rats with activity induction was used.
- the AH fragment had nucleotide sequences corresponding to the regions A and H.
- the cDNA was used as a template.
- DNA comprising the nucleotide sequence represented by SEQ ID NO. 9 was synthesized and used as a sense primer.
- PCR was effected at 35 cycles, each cycle composed of 94° C. for one minute, 55° C. for one minute and 72° C. for 2 minutes.
- the reaction product was analyzed by agarose gel electrophoresis, and an amplified fragment of 1.3 kb (A3 fragment) was observed.
- A3 fragment was extracted from agarose, which was then inserted into pCRII vector.
- the A3 fragment was specifically hybridized with the mRNA from the rats with activity induction.
- the A3 fragment contained almost whole length of the AH fragment.
- the cDNA phage library prepared in Example 3 was spread on an agar medium and cultivated to a final concentration of 10,000 to 20,000 plaques per one petri dish.
- HybondN + membrane manufactured by Amersham, Co. was placed on each of the petri dishes with the plaques formed thereon, to transfer the plaque DNA onto the membrane. Two transcription membranes were prepared per one petri dish.
- the transcription membranes were subject to alkali treatment (immersion in 1.5 M NaCl and 0.5 M NaOH) and SDS treatment (immersion in 2 ⁇ SSC and 0.1% SDS solution), rinsed and dried, and then, the resulting membranes with plaque DNA immobilized thereon were used as blotting membranes for the following hybridization.
- PCR was effected under conditions of 30 cycles, each cycle of a process of 94° C. for one minute, 50° C. for one minute and 72° C. for one minute.
- the blotting membranes prepared above were immersed in a hybridization solution [5 ⁇ SSC, 0.1% Sarkosyl, 0.02% SDS, 1% hybridization blocking solution (manufactured by Boehringer Mannheim, Co.)] at 60° C. for 5 hours, followed by addition of thermally treated DIG labeled probe (10 ⁇ l/10 ml-hybridization solution), for overnight hybridization at 65° C.
- a hybridization solution [5 ⁇ SSC, 0.1% Sarkosyl, 0.02% SDS, 1% hybridization blocking solution (manufactured by Boehringer Mannheim, Co.)] at 60° C. for 5 hours, followed by addition of thermally treated DIG labeled probe (10 ⁇ l/10 ml-hybridization solution), for overnight hybridization at 65° C.
- the membranes were subject to rinsing (rinsing twice in 2 ⁇ SSC and 0.1% SDS at room temperature for 5 minutes, rinsing twice in 0.1 ⁇ SSC and 0.1% SDS at 60° C.
- plaques hybridizable with the fragment were selected from the plaques described above.
- plaques selected at each stage were again inoculated on petri dishes, and then, it was confirmed that these were hybridizable. By PCR using both the primers of the region A and AUAP, additionally, it was confirmed that the plaques had the nucleotide sequence of the A3 fragment.
- ORF open reading frame
- Escherichia coli strain DH5 ⁇ was transformed, and thereafter, an ampicillin resistant strain was selected, from which the plasmid was extracted according to a known method.
- the plasmid was named pCMD3R.
- pCMD3R was introduced into an animal cell, to be expressed therein as follows.
- COS7 cell was cultivated in a DMEM culture medium (manufactured by GIBCO BRL, Co.) supplemented with 10% FCS (fetal calf serum) in a petri dish for 2 days.
- FCS fetal calf serum
- the cells were peeled off from the petri dish by trypsin treatment, and the cells were rinsed in PBS and then suspended in 0.5 ml of KPBS (137 mM KCl 2.7 mM NaCl, 8.1 mM Na 2 HPO 4 1.5 mM NaH 2 PO 4 4 mM MgCl 2 ), to a final concentration of 2 to 6.0 ⁇ 10 6 /ml.
- KPBS 137 mM KCl 2.7 mM NaCl, 8.1 mM Na 2 HPO 4 1.5 mM NaH 2 PO 4 4 mM MgCl 2
- the DNA introduced cell was suspended in 10 ml of DMEM culture medium containing 10% FCS, for cultivation in a 5% CO 2 incubator at 37° C. for 48 to 72 hours.
- Hybridization was effected overnight in a hybridization solution containing formamide at 40% under a condition of 42° C.
- DNA was extracted from these clones, to analyze the nucleotide sequence of the DNA inserted into the clones.
- the DNA had the nucleotide sequence represented by SEQ ID NO. 6. In the DNA fragment was observed ORF encoding a peptide of 508 amino acids.
- the peptide had an amino acid sequence in common with the rat-derived 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase in terms of 413 amino acid residues, and contained amino acid sequences possibly corresponding to the hem binding region and adrenodoxin binding region, commonly observed in the P450 family protein.
- the DNA sequence included a sequence of 1724 residues, which is the same as the sequence derived from rats, and therefore, it was indicated that the DNA had high homology.
- the gene-introduced cells of 5 ⁇ 10 5 in number were cultivated in 10 ml of a DMEM culture medium containing 10% FCS for 24 hours, and then, the culture medium was exchanged to a DMEM culture medium (8 ml) containing 1% FCS, followed by addition of [26, 27- 3 H]-25-hydroxyvitamin D 3 (manufactured by Amersham, Co.) at 2000 Bq/3 ⁇ l-methanol solution, and then, the resulting mixture was cultivated for 24 hours.
- vitamin D 3 metabolites were extracted from the culture supernatant and the cells by the Bligh & Dyer's method [Can. J. Biochem., 37, 911 (1959)]. More specifically, the culture was transferred into a 50-ml centrifuge tube equipped with a screw cap, while 10 ml methanol was added into the petri dish, to scrape the cells with a scraper, and the cells were then transferred into the centrifuge tube. Methanol (10 ml) was again added into the petri dish, to suspend the cells remaining in the petri dish, and the resulting suspension was thoroughly transferred into the centrifuge tube.
- Chloroform (10 ml) was added into the centrifuge tube for thorough mixing, followed by further addition of 10 ml of chloroform and subsequent complete re-mixing, and the resulting tube was left to stand to separate a chloroform layer from an aqueous layer.
- the chloroform extract solution in the separated chloroform layer was placed in another centrifuge tube, followed by further addition of 10 ml of chloroform to the remaining aqueous layer, for mixing and extraction in the same manner, and the resulting chloroform extract solution was combined together with the previously recovered chloroform extract solution.
- the mixture solution was centrifuged, to separate the chloroform layer from the aqueous layer.
- vitamin D 3 metabolites were identified by using a vector pcDNA3 which does not carry the gene of the present invention.
- A represents the analytical results of metabolites in the cells introduced with pcMD3R; and “B” represents the analytical results of metabolites in the cells introduced with pcDNA3. Because 1 ⁇ , 25-hydroxyvitamin D 3 was detected only in the cells introduced with pcMD3R carrying the gene of the present invention, it was indicated that only the cells had 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity, which further indicates that the gene of the present invention encodes 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase.
- a polypeptide having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity being useful for the prevention, diagnosis and therapeutic treatment of adult diseases such as osteoporosis induced by the decrease of active type vitamin D 3
- DNA encoding the polypeptide a recombinant DNA prepared by inserting the DNA in a vector, a transformant carrying the recombinant DNA, a method for preparing 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase by using the transformant, a method for preparing 1 ⁇ , 25-dihydroxyvitamin D 3 by using the polypeptide having 25-hydroxyvitamin D 3 -1 ⁇ -hydroxylase activity, and an antibody recognizing the polypeptide.
Abstract
The present invention relates to a polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity, being useful for the prevention, diagnosis and therapeutic treatment of adult diseases such as osteoporosis induced by the decrease of active type vitamin D3 and catalyzing the final stage of vitamin D3 activation; and the gene encoding the polypeptide.
In accordance with the present invention, the following can be provided; a polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity, DNA encoding the polypeptide, a recombinant DNA prepared by inserting the DNA in a vector, a transformant carrying the recombinant DNA, a method for preparing 25-hydroxyvitamin D3-1α-hydroxylase by using the transformant, a method for preparing 1α, 25-dihydroxyvitamin D3 comprising using the polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity, and an antibody recognizing the polypeptide.
Description
- 1. Field of the Invention
- The present invention relates to a polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity, DNA encoding the polypeptide, a recombinant DNA prepared by inserting the DNA in a vector, a transformant carrying the recombinant DNA, a method for preparing 25-hydroxyvitamin D3-1α-hydroxylase by using the transformant, a method for preparing 1α, 25-dihydroxyvitamin D3 by using the polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity and to an antibody recognizing the polypeptide.
- 2. Prior Art
- Active type vitamin D3 has been known as a hormone having various biological actions such as the action of controlling calcium metabolism, the induction of cellular differentiation, and immunomodulation.
- It has been known that active type vitamin D3 is generated from vitamin D3 having no biological actions through the metabolism in biological organisms.
- As one of the action mechanisms of active type vitamin D3, an action mechanism through cytoplasmic receptors have been known.
- It has been known that active type vitamin D3 is essentially 1α, 25-dihydroxyvitamin D3 wherein the positions 1α and 25 have been hydroxylated. As to the metabolic pathway for the activation, it has been known that vitamin D3 is firstly modified into 25-hydroxyvitamin D3 by introducing a hydroxyl group into the position 25 and the position 1α of the resulting 25-hydroxyvitamin D3 is hydroxylated to form 1α, 25-dihydroxyvitamin D3 [All of vitamin D3, edited by Etsuro Ogata, Tateo Suda, and Yosuke Ogura, Kodansha Scientific, Co. (1993)].
- As 25-hydroxylase gene which functions to introduce a hydroxyl group into the position 25, a gene derived from rat liver has been cloned (Japanese Published Unexamined Patent Application No.2324893/1991). Furthermore, the gene of the hydroxylase of the position 24 of vitamin D3 has been cloned [Japanese Published Unexamined Patent Application No.207196/1992].
- As an enzyme to hydroxylate the position 1α of vitamin D3, human CYP27 has been reported [Proc. Natl. Acad. Sci., USA, 91, 10014 (1994)], but the activity of the enzyme to hydroxylate the position 1α is a secondary activity, so the activity is very weak, which is not an essential activity. Additionally, the activity is not inducible.
- It has been known that 25-hydroxyvitamin D3-1α-hydroxylase activity is induced in the kidneys of rats and chickens fed with vitamin D3 deficient diet [Gerontology, 42 (Supplement 1), 67-77 (1996)].
- Up to now, no report has been presented yet in any of animal species, concerning the isolation of any enzyme polypeptide catalyzing the final stage of vitamin D3 activation to hydroxylate the most significant position 1α, or the isolation of a gene encoding the polypeptide.
- As a method for producing 1α, 25-dihydroxyvitamin D3, a method comprising the use of kidney homogenates or mitochondria fractions of animals such as chicken has been known [Nature, 230, 228 (1971); J. Biol. Chem., 247, 7528 (1972); Biochemistry, 25, 5512 (1986) ], but the method requires a vast amount of animal kidney or liver and demands laborious works to prepare them, so the method is insufficient and is not practical. It has been found a microorganism having activity to directly induce hydroxyl groups into the positions 1α and 25 (Japanese Published Examined Patent Application No.64678/1992), but the activity is very weak and substrate specificity is low, so it is difficult to separate the product and byproducts.
- An object of the present invention is to provide a polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity and a gene encoding the polypeptide. 25-hydroxyvitamin D3-1α-hydroxylase catalyzes the final stage of vitamin D3 activation, and is useful for prevention, diagnosis and therapeutic treatment of diseases such as osteoporosis induced by the decrease of active type vitamin D3.
- The present invention relates to a polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity, DNA encoding the polypeptide, a recombinant DNA prepared by inserting the DNA in a vector, a transformant carrying the recombinant DNA, a method for producing 25-hydroxyvitamin D3-1α-hydroxylase by using the transformant, a method for producing 1α, 25-dihydroxyvitamin D3 by using the polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity and an antibody recognizing the polypeptide.
- FIG. 1 is an HPLC chart of the identified vitamin D3 metabolites in cells to which pcMD3R or pcDNA3 is introduced, wherein “A” shows the results of the identification of vitamin D3 metabolites in the cells to which pcMD3R is introduced; and “B” represents the results of vitamin D3 metabolites in the cells to which pcDNA3 is introduced, wherein (1) represents 25-hydroxyvitamin D3; (2) represents 24, 25-dihydroxyvitamin D3; (3) represents 10-oxo-19-nor-25-hydroxyvitamin D3 and (4) represents α, 25-dihydroxyvitamin D3.
- The present invention will now be described in detail.
- As the polypeptide of the present invention, any polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity may be used, for example including a polypeptide having an amino acid sequence selected from amino acid sequences represented by SEQ ID NOS. 1 and 2, or having an amino acid sequence in which one or more amino acid residues are deleted, substituted or added in the amino acid sequence of a polypeptide, the amino acid sequence being selected from amino acid sequences represented by SEQ ID NOS. 1 and 2, and having 25-hydroxyvitamin D3-1α-hydroxylase activity.
- The polypeptide having an amino acid sequence in which one or more amino acid residues are deleted, substituted or added in the amino acid sequence, the amino acid sequence being selected from amino acid sequences represented by SEQ ID NOS. 1 and 2, and having 25-hydroxyvitamin D3-1α-hydroxylase activity may be prepared according to the method described in Nucleic Acids Research, 10, 6487 (1982); Proc. Natl. Acad. Sci., USA, 79, 6409 (1982); Proc. Natl. Acad. Sci., USA, 81, 5662 (1984); Science, 224, 1431 (1984); PCT WO85/00817 (1985); Nature, 316, 601 (1985); Gene, 34, 315 (1985); Nucleic Acids Research, 13, 4431 (1985); Current Protocols in Molecular Biology, Chapter 8. Mutagenesis of Cloned DNA, John Wiley & Sons, Inc. (1989) and the like.
- DNA of the present invention includes DNA encoding the polypeptide of the present invention, for example, DNA encoding the polypeptide having an amino acid sequence selected from amino acid sequences represented by SEQ ID NOS. 1 and 2, DNA encoding the polypeptide having an amino acid sequence in which one or more amino acid residues are deleted, substituted or added in the amino acid sequence selected from amino acid sequences represented by SEQ ID NOS. 1 and 2, and having 25-hydroxyvitamin D3-1α-hydroxylase activity, DNA comprising a nucleotide sequence selected from SEQ ID NOS. 3 and 4, or DNA hybridizable with these DNAs under stringent conditions.
- In the present application, “DNA hybridizable under stringent conditions” means DNA recovered by using the DNA encoding the polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity as a probe through colony hybridization, plaque hybridization or Southern blot hybridization or the like, specific example of which includes DNA identified by hybridization in the presence of 0.7 to 1.0 M NaCl at 65° C. by using a filter on which a DNA prepared from colonies or plaques is immobilized and then rinsing the filter at a condition of 65° C. by using 0.1 to 2×SSC solutions (the composition of 1×SSC solution is as follows; 150 mM NaCl and 15 mM sodium citrate).
- The hybridization can be carried out according to the method described in Molecular Cloning, A Laboratory Manual, 2-nd edition, Sambrook, Fritsch & Maniatis, eds., Cold Spring Harbor Laboratory Press (1989) (referred to as “Molecular Cloning, 2-nd editions” hereinafter), Current Protocols in Molecular Biology,
Supplement 1 to 34, DNA Cloning 1: Core Techniques, A Practical Approach, Second Edition, Oxford University (1995) or the like. Hybridizable DNA includes for example DNA having homology of 60% or more, preferably 80% or more, more preferably 95% or more to the nucleotide sequence of the DNA encoding the polypeptide having an amino acid sequence selected from amino acid sequences represented by SEQ ID NOS. 1 and 2. - The antibody of the present invention includes antibodies recognizing the polypeptide described above.
- The present invention will now be described in detail below.
- 1) Preparation of cDNA library from mRNA derived from rat kidney
- From tissues, for example kidney of a rat fed with vitamin D3 deficient diet to induce 25-hydroxyvitamin D3-1α-hydroxylase activity, mRNA [sometimes referred to as poly(A)+RNA] is prepared.
- Method for preparing such mRNA includes a method comprising preparing the whole RNA from the rat tissues and preparing then mRNA as poly(A)+RNA by using the oligo (dT) immobilized cellulose column method [Molecular Cloning, 2-nd edition]; a method comprising directly preparing mRNA from rat tissues by using kits such as Fast Track mRNA Isolation kit manufactured by Invitrogen, Co, and Quick Prep mRNA Purification Kit, manufactured by Pharmacia, Co. and the like.
- Method for preparing the whole RNA includes thiocyanate guanidine-trifluoroacetic acid cesium method [Methods in Enzymol., 154, 3 (1987)], AGPC method [Experimental Medicine, 9, 1937 (1991)] and the like.
- The whole RNA and mRNA may be prepared from rat tissues with no induction of 25-hydroxyvitamin D3-1α-hydroxylase activity by similar method described above.
- By using the mRNA prepared above, a cDNA library is prepared by a conventional method.
- Method for preparing the cDNA library includes for example a method for preparing a cDNA library, comprising synthesizing cDNA from the mRNA derived from the kidney resected from a rat with 25-hydroxyvitamin D3-1α-hydroxylase activity induced, by using ZAP-cDNA synthesis kit manufactured by Stratagene, Co., cDNA Synthesis System manufactured by GIBCO BRL, Co. and the like, ligating then an adapter with a digestible site with an appropriate restriction enzyme, digesting a cloning vector λ ZAP II with the restriction enzyme, and inserting the cDNA into the digested site of the cloning vector.
- As the cloning vector to prepare the cDNA library, any cloning vector capable of autonomously replicating inEscherichia coli K12 may be used.
- The cloning vector includes for example phage vector, plasmid vector and the like, preferably including λ ZAP II described above, in addition to pUC18, pBluescript (Stratagene, Co.) and the like.
- As a host microorganism, any microorganism of speciesEscherichia coli may be used, preferably including Escherichia coli XL1-Blue, Escherichia coli XL2-Blue, Escherichia coli DH1, Escherichia coli MC1000 and the like.
- 2) Selection of an amino acid sequence characteristic to vitamin D3 hydroxylase
- Screening a region with the amino acid sequence present in common with both the hydroxylase of the position 25 of rat vitamin D3 [Japanese Published Unexamined Patent Application No. 232493/1991] and the hydroxylase of the position 24 thereof (Japanese Published Unexamined Patent Application No. 207196/1992), the amino acid sequence present in the region is selected as the amino acid sequence characteristic to the hydroxylase of vitamin D3.
- The region with the amino acid sequence includes for example adrenodoxin binding region (referred to as “Region A” hereinafter), heme binding region (referred to as “Region H” hereinafter) and the like.
- 3) Amplification of a partial fragment of DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase
- Based on the amino acid sequence of the region selected in 2) above and with reference to the codons of rat, a sense primer and an antisense primer are designed and prepared, which are appropriate for the amplification of the DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase by polymerase chain reaction (referred to as “PCR” hereinafter).
- Such primers include DNA comprising a nucleotide sequence selected from nucleotide sequences represented by SEQ ID NOS. 7, 8 and 9.
- Using the mRNA recovered in 1), first strand DNA is synthesized by reverse transcriptase reaction. DNA synthesis may be carried out using a cDNA synthetic kit manufactured by Stratagene, Co.
- Using the first strand DNA as a template and utilizing the sense primers and antisense primers as prepared above, RT (reverse transcription)-PCR is carried out to amplify a DNA region containing a part of DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase.
- Using the RT-PCR amplified fragments and 3′ RACE system kit manufactured by BRL, Co., PCR amplification is carried out between the RT-PCR amplified fragment and the 3-terminal poly(A) structure to recover a longer PCR amplified fragment additionally containing the noncoding region on 3′ side.
- More specifically, a PCR amplified fragment containing the 3′ noncoding region can be recovered by synthesizing cDNA using the mRNA recovered in 1) and the oligo dT/AUAP primer in the 3′ RACE system kit manufactured by BRL, CO. and conducting PCR amplification using the DNA as a template and using the AUAP primer in the 3′ RACE system kit manufactured by BRL and the RT-PCR amplified fragment.
- Using 5′ RACE method in the same manner, a PCR amplified fragment containing the 5′ region can be recovered.
- It can be confirmed that the amplified DNA fragment is a partial fragment of the DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase by the following method.
- Poly(A)+RNAs derived from a rat induced with 25-hydroxyvitamin D3-1α-hydroxylase activity and a non-induced rat are individually subject to agarose electrophoresis, and the poly(A) +RNAs electrophoresed are then individually transferred onto each membrane filter in a conventional manner.
- Using these membrane filters, Northern hybridization is carried out using the amplified DNA fragment as a probe.
- By confirming that the amplified DNA fragment is hybridizable only when using the membrane filter prepared from the poly(A)+RNA derived from the rat induced with the activity, it is revealed that the DNA fragment is a partial fragment of the DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase.
- The amplified DNA fragment is then inserted into a plasmid, and the resulting plasmid can be used for nucleotide sequencing and the assay of expression specificity.
- The method for inserting the fragment into a plasmid includes a method for inserting the fragment into a plasmid, comprising extracting the amplified DNA fragment from the agarose using a DNA purification kit (manufactured by Bio Rad Co.) and ligating the fragment with a vector pCRII (manufactured by Invitrogen, Co.).
- 4) Selection of a clone carrying DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase
- A cDNA library is screened by labeling the amplified DNA fragment and subjecting the resulting fragment to colony- or plaque hybridization in a conventional manner.
- The labeling of the amplified DNA fragment can be carried out using for example DIG labeling kit (#1 175 033, manufactured by Boehringer Mannheim, Co.). More specifically, a DIG-labeled amplified DNA fragment can be recovered by PCR using the amplified DNA fragment as a template and utilizing the kit.
- The plaque hybridization method includes for example the following method.
- The cDNA library (phage) prepared in 1) above is spread on an agar culture medium and cultivated to a final concentration of 10,000 to 20,000 plaques per one petri dish.
- Hybond N+ membrane (manufactured by Amersham, Co.) is placed on the petri dish with plaques formed thereon to transfer the plaque DNA onto the membrane.
- The transfer membrane is subject to alkali treatment (comprising for example immersing the membrane in 1.5 M NaCl, 0.5 M NaOH solution) and SDS treatment (comprising for example immersing in 2×SSC, 0.1% SDS solution), rinsing and drying, and the resulting membrane is used for hybridization as a blotted membrane with the plaque DNA immobilized thereon.
- The blotted membrane is immersed in a hybridization solution [5×SSC, 0.1% Sarkosyl, 0.02% SDS, 1% blocking reagent for hybridization (manufactured by Boehringer Mannheim, Co.)] for 5 hours, and the labeled amplified DNA fragment which has been subjected to thermal treatment is added thereto for hybridization.
- After hybridization, the membrane is subject to rinsing [for example, rinsing twice in 2×SSC and 0.1% SDS at room temperature for 5 minutes, and rinsing twice in 0.1×SSC and 0.1% SDS at 60° C. for 15 minutes] and blocking [for example, blocking in 1×blocking solution (manufactured Boehringer Mannheim Co.), 0.1 M maleic acid, 0.15 M NaCl, pH 7.5], and thereafter, the labeled amplified DNA is detected by a variable method, depending on the labeling mode of the labeled amplified DNA fragment, whereby an objective clone can be selected.
- When a DNA fragment labeled with DIG is used, for example, reaction with anti-DIG antibody labeled with AP and subsequent alkali treatment [for example, immersing in 0.1 M Tris-HCl (pH 9.5), 0.1 M NaCl and 50 mM MgCl2 solution] are carried out, and a plaque hybridized with the probe is screened on an X-ray film using a DIG luminescence detection kit (#1 363 514, manufactured by Boehringer Mannheim, Co.) to select a clone containing DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase.
- 5) Recovery of DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase
- From the clone recovered by the screening procedure described above in 4), DNA is isolated in a conventional manner to recover DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase.
- DNA nucleotide sequencing can be done by common nucleotide sequencing methods, for example, the dideoxy method by Sanger et. al. [Proc. Natl. Acad. Sci. USA, 74, 5463 (1977)] or by sequencing by using a nucleotide sequencer such as 373A.DNA sequencer [manufactured by Perkin Elmer, Co.].
- As the gene sequence of 25-hydroxyvitamin D3-1α-hydroxylase thus determined includes DNA comprising the sequence represented by SEQ ID NO. 3 or 5.
- Based on the DNA sequence thus determined by the method, an objective DNA may be prepared by chemical synthesis with a DNA sequencer. Such DNA sequencer includes a DNA sequencer based on the thiophosphite method, manufactured by Shimadzu, and a DNA sequencer Model 1392 based on the phosphoramidits method, manufactured by Perkin Elmer, Co.
- The rat-derived 25-hydroxyvitamin D3-1α-hydroxylase gene as recovered above can be used to recover 25-hydroxyvitamin D3-1α-hydroxylase gene derived from other animals, for example, humans, by the following method.
- The DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase as recovered above is labeled with α-32P-dCTP by using for example Megaprime DNA labeling kit (manufactured by Amersham Co.). In the same manner as for the method described above in 1), a cDNA library is prepared from objective animal tissues, for example human kidney.
- The cDNA library is screened by colony- or plaque hybridization using the labeled DNA fragment described in 4) above as a probe.
- From the clone recovered through the screening, the objective DNA is isolated by the method as described in 5) above, and the nucleotide sequence is determined.
- The nucleotide sequence having high homology to the nucleotide sequence of the gene of rat 25-hydroxyvitamin D3-1α-hydroxylase is defined as DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase derived from the objective animal.
- The gene includes for example human kidney-derived DNA comprising the sequence represented by SEQ ID NO. 4 or 6.
- 6) Production of 25-hydroxyvitamin D3-1α-hydroxylase polypeptide
- To express the DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase as recovered in 5) above in a host cell, the methods described in Molecular Cloning, 2-nd edition and Current Protocols in Molecular Biology,
Supplement 1 to 34 and the like may be used. - More specifically, DNA recovered in 5) is modified into DNA fragments with appropriate lengths so that the DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase might be contained therein, by using restriction enzymes or DNases, which are then inserted into the downstream of a promoter in an expression vector, and then, the expression vector with the DNA inserted therein is introduced into a host cell appropriate for the expression vector.
- Any host cell capable of expressing the objective gene may be used, including for example bacteria, yeast, animal cells and insect cells.
- As the expression vector, a vector, which is autonomously replicable in the host cell or possibly inserted into the chromosome and contains a promoter at the site on which the gene of 25-hydroxyvitamin D3-1α-hydroxylase can be transcribed, may be used.
- When procaryotic cells such as bacteria are used as such host cells, it is preferable that an expression vector of 25-hydroxyvitamin D3-1α-hydroxylase gene is autonomously replicable in the procaryotic cells and the vector is composed of a promoter, a ribosome binding sequence, DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase and a transcription termination sequence. A gene regulating the promoter may be contained in the vector.
- Such expression vector includes for example pBTrp2, pBTacl, pBTac2 (all commercially available from Boehringer Mannheim, Co.), pKK2-2 (manufactured by Pharmacia, Co.) pSE280 (manufactured by Invitrogen, Co.), pGEMEX-1 (manufactured by Promega, Co.), pQE-8 (manufactured by QIAGEN, Co.), pKYP10 (Japanese Published Unexamined Patent Application No. 110600/1983), pKYP200 [Agric. Biol. Chem., 48, 669 (1984)], pLSA1 [Agric, Biol. Chem., 53, 277 (1989)], pGEL1 [Proc. Natl. Acad. Sci., USA, 82, 4306 (1985)], pBluescript (STRATAGENE, Co.), pTrs30 (FERM BP-5407), pTrs32 (FERM BP-5408), pGHA2 (FERM BP-400), pGKA2 (FERM BP-6798), pTerm2 (Japanese Published Unexamined Patent Application No. 22979/1991, U.S. Pat. Nos. 4,686,191, 4,939,094, 5,160,735), pKK233-2 (manufactured by Pharmacia, Co.), PGEX (manufactured by Pharmacia, Co.), pET system (manufactured by Novagen, Co.) pSupex, pUB110, pTP5, and pC194 and the like.
- Any promoter which can be expressed in host cells such asEscherichia coli may be used, including for example promoters derived from Escherichia coli and phages, for example trp promoter (Ptrp), lac promoter (Plac), PL promoter, PR promoter, PletI promoter, and PSE promoter; SPO1 promoter, SPO2 promoter, penP promoter and the like. Additionally, artificially designed and modified promoters, such as a promoter of two Ptrp's in series (Ptrp×2) and tac promoter may be used.
- Any ribosome binding sequence may be used, as long as the sequence may be expressed in host cells such asEscherichia coli. Preferably, a plasmid wherein the distance between the Shine-Dalgarno sequence and the initiation codon is adjusted to an appropriate distance (for example, 6 to 18 nucleotides) may be used.
- To express 25-hydroxyvitamin D3-1α-hydroxylase gene of the present invention, a transcription termination sequence is not necessarily required, but preferably, a transcription termination sequence is arranged immediately below the structural gene.
- Examples of the host cell include microorganisms belonging to the genus Escherichia, Serratia, Bacillus, Brevibacterium, Corynebacterium, Microbacterium, Pseudomonas, and the like. Specific examples includeEscherichia coli XL1-Blue, Escherichia coli XL2-Blue, Escherichia coli DH1, Escherichia coli MC1000, Escherichia coli KY3276, Escherichia coli W1485, Escherichia coli JM109, Escherichia coli HB101, Escherichia coli No.49, Escherichia coli W3110, Escherichia coli NY49, Seratia ficaria, Seratia fonticola, Seratia liquefaciens, Seratia marcescens, Bacillus subtilis, Bacillus amyloliguefaciens, Brevibacterium ammoniagenes, Brevibacterium immariophilum ATCC 14068, Brevibacterium saccharolyticum ATCC 14066, Corynebacterium glutamicum ATCC 13032, Corynebacterium glutamicum ATCC 14067, Corynebacterium glutamicum ATCC 13869, Corynebacterium acetoacidophilum ATCC 13870, Microbacterium ammoniaphilum ATCC 15354, Pseudomonas sp. D-0110 and the like.
- As the method for introducing the recombinant vectors, any method for introducing DNA into the host cells may be used, including for example a method comprising the use of calcium ion [Proc. Natl. Acad. Sci. USA, 69, 2110 (1972)], protoplast method (Japanese Published Unexamined Patent Application No. 2483942/1988), and methods described in Gene, 17, 107 (1982) and Molecular & General Genetics, 168, 111 (1979).
- In case of using yeast bacterial strains as host cells, expression vectors for example YEp13 (ATCC 37115), YEp24 (ATCC 37051), YCp50 (ATCC 37419), pHS19, and pHS15 may be used.
- As the promoter, any promoter which can be expressed in yeast bacterial strains may be used. For example, promoters such as PHO5 promoter, PGK promoter, GAP promoter, ADH promoter,
gal 1 promoter,gal 10 promoter, heat shock protein promoter, MFα1 promoter,CUP 1 promoter and the like may be listed. - Host cells used include for exampleSaccharomyces cerevisae, Shizosaccharomyces pombe, Kluyveromyces lactis, Trichosporon pullulans, and Schwanniomyces alluvius.
- As the method for introducing the recombinant vectors, any method for introducing DNA into yeast cells may be used, for example, electroporation method [Methods. Enzymol., 194, 182 (1990)], spheroplast method [Proc. Natl. Acad. Sci. USA, 84, 1929 (1978)], lithium acetate method [Journal of Bacteriology, 153, 163 (1983)], a method described in Proc. Natl. Acad. Sci. USA, 75, 1929 (1978) and the like.
- In case of using animal cells as a host, the expression vector includes for example pcDNAI, pcDM8 (commercially available from Funakoshi, Co.), pAGE107 (Japanese Published Unexamined Patent Application No. 22979/1991; Cytotechnology, 3, 133 (1990)), pAS3-3 (Japanese Published Unexamined Patent Application No. 227075/1990), pCDM8 [Nature, 329, 840 (1987)], pcDNAI/Amp (manufactured by Invitrogen, Co.), pREP4 (manufactured by Invitrogen, Co.), pAGE103 [J. Biochem., 101, 1307 (1987)], and pAGE210.
- As a promoter, any promoter which can be expressed in animal cells may be used, including for example a promoter of IE (immediate early) gene of cytomegalovirus (human CMV), an early promoter of SV40 or a promoter of metallothionein, a promoter retrovirus, a heat shock promoter and an SRα promoter. Additionally, the enhancer of the IE gene of human CMV may be used in combination with such promoter.
- Examples of the host cell include Namalwa cell, monkey cos cell, Chinese hamster CHO cell, HST5637 (Japanese Published Unexamined Patent Application No.299/1988) and the like.
- As the method for introducing recombinant vector into animal cells, any method for introducing DNA into animal cells may be used, e.g., electroporation method [Cytotechnology, 3, 133 (1990)], calcium phosphate method [Japanese Published Unexamined Patent Application No. 227075/1990], lipofection method [Proc. Natl. Acad. Sci., USA, 84, 7413 (1987)] and the method described in Virology, 52, 456 (1973)]. The preparation of a transformant and cultivation of the transformant may be carried out according to the method described in Japanese Published Unexamined Patent Application No. 227075/1990 or Japanese Published Unexamined Patent Application No. 257891/1990.
- In case of using insect cells as a host, the protein may be expressed according to the methods described in Baculovirus Expression Vectors, A Laboratory Manual, W. H. Freeman and Company, New York, 1992; Current Protocols in Molecular Biology, Supplement 1-38(1987-1997); Bio/Technology, 6, 47 (1988) and the like.
- More specifically, the protein can be expressed by co-introduction of the transfer vector containing interest gene and helper DNA fragment of baculovirus into an insect cell to recover a recombinant virus in the supernatant of the culture of the insect cell and infecting an insect cell with the recombinant virus.
- The transfer vector for gene introduction to be used in the method includes for example pVL1392, pVL1393, pBlueBacIII (all manufactured by Invitrogen, Co.) and the like.
- As the helper DNA fragment of baculovirus, for example, Autographa californica nuclear polyhedrosis virus, which is a virus infecting insects of the family Barathra, may be used.
- As such insect cell,Spodoptera frugiperda oocytes Sf9 and Sf21 [Baculovirus Expression Vectors, A Laboratory Manual, W. H. Freeman and Company, New York, 1992], Trichoplusia ni oocytes High 5 (manufactured by Invitrogen Co.) and the like, may be used.
- The method for co-introducing the above-described transfer vector containing interest gene and the helper DNA fragment of baculovirus into insect cells to prepare the recombinant virus includes for example calcium phosphate method (Japanese Published Unexamined Patent Application No. 227075/1990), lipofection method [Proc. Natl. Acad. Sci. USA, 84, 7413 (1987)], and the like.
- As the expression method of the gene, secretory production and expression of fused protein may be carried out according to the method described in Molecular Cloning, 2-nd edition and the like, in addition to direct expression.
- When the gene is expressed in yeast, animal cells or insect cells, a glycosylated protein can be obtained.
- The transformant thus obtained is cultivated in a culture medium to form polypeptide of the present invention in the culture, and the formed polypeptide is recovered from the culture, whereby the polypeptide of the present invention can be produced. The transformant of the present invention is cultivated in a culture medium according to a conventional method for use in cultivating hosts.
- As the culture medium to cultivate a transformant recovered by using procaryotic organisms such asEscherichia coli or eucaryotic organisms such as yeast, any natural culture medium or any synthetic culture medium may be used, so long as it contains carbon sources, nitrogen sources, inorganic salts and the like which can be assimilated by the organisms.
- Any carbon source which can be assimilated by the organisms may be used, including carbohydrates such as glucose, fructose, sucrose, molasses containing them, starch and starch hydrolysates; organic acids such as acetic acid and propionic acid; alcohols such as ethanol and propanol.
- As such nitrogen sources, ammonia; ammonium salts of inorganic acids or organic salts, such as ammonium chloride, ammonium sulfate, ammonium acetate, and ammonium phosphate; other nitrogen containing compounds; peptone; meat extract; yeast extract; corn steep liquor; casein hydrolysates; soy bean meal; soybean meal hydrolysates; various fermentation products, and digested products thereof, may be used.
- As the inorganic substances, potassium dihydrogen phosphate, dipotassium hydrogen phosphate, magnesium phosphate, magnesium sulfate, sodium chloride, ferrous sulfate, manganese sulfate, copper sulfate, calcium carbonate and the like, may be used.
- Cultivation is generally carried out under aerobic conditions, for example, by shaking culture or spinner culture under aeration. The cultivation is carried out at 15 to 40° C. for 16 hours to seven days at pH 3.0 to 9.0. The pH is adjusted with an inorganic or organic acid, an alkali solution, urea, calcium carbonate, ammonia and the like.
- During cultivation, antibiotics such as ampicillin and tetracycline may be added to the culture medium, if necessary.
- For cultivating microorganisms transformed with an expression vector prepared using an inducible promoter, an inducer may be added to the culture medium, if necessary. For cultivating microorganisms transformed with an expression vector prepared using lac promoter, for example, isopropyl-β-D-thiogalactopyranoside may be added to the medium; for cultivating microorganisms transformed with an expression vector prepared using trp promoter, for example, indole acrylic acid may be added to the medium.
- As the culture medium for cultivating a transformant recovered by using animal cells as the hosts, RPMI 1640 culture medium [The Journal of the American Medical Association, 199, 519 (1967)], Eagle's MEM culture medium [Science, 122, 501 (1952)], Dulbecco's modified MEM culture medium [Virology, 8, 396 (1959)], DMEM culture medium (manufactured by GIBCO BRL, Co.), 199 culture medium [Proceedings of the Society for the Biological Medicine, 73, 1 (1950)] for conventional use or culture media prepared by adding fetal calf serum and the like to these culture media, may be used.
- Generally, cultivation is carried out in the presence of 5% CO2 at pH 6 to 8 at 30 to 40° C. for 1 to 7 days.
- During cultivation, if necessary, antibiotics such as kanamycin and penicillin may be added to the culture medium.
- As the culture medium to cultivate transformants recovered using insect cells as the hosts, culture medium for general use, such as TNM-FH culture medium [manufactured by Pharmingen, Co.], Sf-900 II SFM culture medium [manufactured by Life Technologies, Co.], ExCell 400, ExCell 405 [both manufactured by JRH Biosciences, Co.], Grace's Insect Medium [Grace, T. C. C. , Nature, 195, 788 (1962)] and the like, may be used.
- Cultivation is carried out at pH 6 to 7 at 25 to 30° C. for 1 to 5 days.
- During cultivation, if necessary, antibiotics such as gentamycin may be added to the culture medium.
- To isolate and purify the polypeptide expressed by the method described above from the culture of the transformant, conventional isolation and purification methods of enzymes may be used.
- When the polypeptide of the present invention is expressed in cells at its dissolved state, a purified sample of the polypeptide is obtained as follows. The cells are recovered through centrifugation after the cultivation, suspended in an aqueous buffer, and disrupted by means of ultrasonic oscillator, French Press, Manton Gaulin homogenizer, Dynomill and the like, to recover a cell-free extract. From the supernatant recovered by the centrifugation of the cell-free extract, a purified sample can be recovered by conventional isolation and purification methods of enzymes, singly or in combination, such as solvent extraction method, salting out methods with ammonium sulfate, etc., desalting method, precipitation methods with organic solvents, anion exchange chromatography by means of resins such as diethylaminoethyl (DEAE)-Sepharose, DIAION HPA-75 (manufactured by Mitsubishi Chemical Corporation); cation exchange chromatography by means of resins such as S-Sepharose FF (manufactured by Pharmacia, Co.); hydrophobic chromatography using resins such as butyl Sepharose and phenyl Sepharose; gel filtration methods using molecular sieves; affinity chromatography method; chromato-focusing method; electrophoresis methods such as isoelectric focusing; and the like.
- When the polypeptide is expressed in cells in the form of an inclusion body, a purified sample of the polypeptide is obtained as follows. The cells are similarly recovered, disrupted, and centrifuged to recover a precipitation fraction, from which the polypeptide is recovered according to a conventional method, and the inclusion body of the polypeptide is solubilized with a polypeptide denaturant. The solubilized solution is diluted or dialyzed in a dilute solution at such an extent that the resulting solution does not contain any polypeptide denaturant or the polypeptide is not any more denatured at the concentration of the polypeptide denaturant, to renature the polypeptide into a normal steric configuration, from which a purified sample can be recovered according to the same isolation and purification method as described above.
- In case that the polypeptide of the present invention or derivatives thereof such as a sugar modified product thereof are secreted extracellularly, the polypeptide or the derivatives thereof can be recovered from the culture supernatant. More specifically, the culture is treated by the method as described above, such as centrifugation, to recover a soluble fraction, and from the fraction, a purified sample is recovered using the isolation and purification method as described above.
- Additionally, the polypeptide expressed by the above method may be prepared by chemical synthetic methods such as Fmoc method (fluorenylmethyloxycarbonyl method), tBoc method (t-butyloxycarbonyl method) and the like. Alternatively, the polypeptide can be prepared by utilizing peptide synthesizers commercially available from Sowa Trade (manufactured by Advanced chemTech, Co., USA), Perkin-Elmer Japan (manufactured by Perkin-Elmer, Co., USA), Pharmacia Biotech (manufactured by PharmaciaBiotech, Co., Sweden), Aroka (manufactured by Protein Technology Instrument, Co., USA), KURABO (manufactured by Synthecell-Vega, Co., USA), Japan PerSeptive Limited (manufactured by PerSeptive, Co., USA), Shimadzu, Co. and the like.
- 7) Production of 1α, 25-dihydroxyvitamin D3
- The polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase and 25-hydroxyvitamin D3 are put in an aqueous medium to form 1α, 25-dihydroxyvitamin D3 in the aqueous medium, and the formed 1α, 25-dihydroxyvitamin D3 is recovered from the aqueous medium. Thus, 1α, 25-dihydroxyvitamin D3 can be produced.
- As a polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity, the polypeptide purified by the method described above in 6) and the microbial culture obtained by the method described above in 6) or a treated product of the culture obtained by treating the culture in various ways and the like, may be used.
- Examples of the treated product of the culture broth include a concentrated product of the culture, a dried product of the culture, a culture supernatant obtained by centrifuging the culture, a concentrated product of the culture supernatant, an enzyme preparation obtained from the culture supernatant, cells (including microbial cells) obtained by centrifuging the culture, a dried product of the cells, a freeze-dried product of the cells, a surfactant-treated product of the cells, an ultrasonic-treated product of the cells, a mechanically disrupted product of the cells, a solvent-treated product of the cells, an enzyme-treated product of the cells, a protein fraction of the cells (fractions having 25-hydroxyvitamin D3-1α-hydroxylase activity), an immobilized product of the cells and an enzyme preparation obtained by extraction from the cells.
- The concentration of the polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity is 0.01 to 50 g/l, preferably 0.05 to 10 g/l, as wet cells.
- The aqueous medium includes water, buffers such as phosphate salts, carbonate salts, acetate salts, borate salts, citrate salts, and Tris; and aqueous solutions containing organic solvents such as alcohols such as methanol and ethanol; esters such as ethyl acetate; ketones such as acetone; amides such as acetoamide. If necessary, surfactants such as Triton X-100 (manufactured by Nakarai Tesque, Co.) and Nonion HS204 (manufactured by Nippon Oils and Fats Co.), or organic solvents such as toluene and xylene may be added at about 0.1 to 20 g/l.
- The concentration of 25-hydroxyvitamin D3 is 0.01 to 50 g/l, preferably 0.01 to 10 g/l.
- 1α, 25-dihydroxyvitamin D3 can be produced by adding polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity and 25-hydroxyvitamin D3. The reaction is carried out at 15 to 80° C., preferably 20 to 40° C., at
pH 3 to 11, preferablypH 4 to 9, for 5 minutes to 96 hours. - 8) Preparation of an antibody recognizing 25-hydroxyvitamin D3-1α-hydroxylase
- A purified product of the whole length or a partial fragment of the protein obtained by the method described in the above in 6) or a peptide having a partial amino acid sequence of the protein of the present invention is used as the antigen. The antigen is administered to animal by subcutaneous, intravenous or intraperitoneal injection together with an appropriate adjuvant (for example, complete Freund's adjuvant, aluminum hydroxide gel, pertussis vaccine, or the like).
- Examples of the animals used include rabbits, goats, 3- to 20-weak-old rats, mice, hamsters and the like.
- Preferable dosage of antigen is 50 to 100 μg per animal.
- When a peptide is used as the antigen, it is preferred to use the peptide as the antigen after binding it covalently to a carrier protein, such as keyhole limpet haemocyanin, bovine thyroglobulin or the like. The peptide used as the antigen can be synthesized using a peptide synthesizer.
- Administration of the antigen is carried out 3 to 10 times at one- to two-week intervals after the first administration. A blood sample is recovered from the fundus of the
eye 3 to 7 days after each administration, and the serum is tested, for example, by enzyme immunoassay (Enzyme-linked Immunosorbent Assay (ELISA), published by Igaku Shoin (1976); Antibodies—A Laboratory Manual, Cold Spring Harbor Laboratory (1988)) as to whether it is reactive with the antigen used for immunization. A non-human mammal whose serums shows a sufficient antibody titer against the antigen used for immunization is submitted for use as the supply source of serum or antibody producing cells. - A polyclonal antibody can be prepared by isolating and purifying it from the serum.
- A monoclonal antibody can be prepared by preparing a hybridoma through fusion of the antibody producing cells with myeloma cells of anon-humanmammal and culturing the hybridoma, or administering the hybridoma to an animal to induce ascites tumor in the animal, and then isolating and purifying it from the culture medium or ascitic fluid.
- Examples of the antibody producing cells include spleen cells, lymph nodes and antibody producing cells in peripheral blood. Particularly, spleen cells are preferred.
- Examples of the myeloma cells include cell lines derived from mouse, such as P3-X63Ag8-U1 (P3-U1) cell line [Current Topics in Microbiology and Immunology, 18, 1-7 (1978)], P3-NS1/1-Ag41 (NS-1) cell line [European J. Immunology, 6, 511-519 (1976)], SP2/O-Ag14 (SP-2) cell line [Nature, 276, 269-270 (1978)], P3-X63-Ag8653 (653) cell line [J. Immunology, 123, 1548-1550 (1979)], P3-X63-Ag8 (X63) cell line [Nature, 256, 495-497 (1975)] and the like, which are 8-azaguanine-resistant mouse (BALB/c) myeloma cell lines.
- Hybridoma cells can be prepared in the following manner.
- Antibody producing cells and myeloma cells are fused, suspended in HAT medium (normal medium supplemented with hypoxanthine, thymidine and aminopterin) and then cultured for 7 to 14 days. After the culturing, a portion of the culture supernatant is sampled and tested, for example, by enzyme immunoassay to select those which can react with the antigen but not with protein which does not contain the antigen. Thereafter, cloning is carried out by limiting dilution analysis, and a hybridoma which shows stable and high antibody titer by enzyme immunoassay is selected as monoclonal antibody producing hybridoma cells.
- With regard to the method for the isolation and purification of the polyclonal antibody or monoclonal antibody, centrifugation, ammonium sulfate precipitation, caprylic acid precipitation, or chromatography using a DEAE-Sepharose column, an anion exchange column, a protein A or G column, a gel filtration column and the like may be employed alone or as a combination thereof.
- 9) Utilization of the polypeptide and the DNA encoding the polypeptide of the present invention and the antibody recognizing the polypeptide of the present invention
- (1) The polypeptide of the present invention can be utilized for producing 1α, 25-dihydroxyvitamin D3 as active type vitamin D3.
- (2) The whole length or partial fragments of the polypeptide of the present invention can be utilized as an antigen against the antibody recognizing 25-hydroxyvitamin D3-1α-hydroxylase.
- (3) By administering the whole length of the 25-hydroxyvitamin D3-1α-hydroxylase or partial fragments thereof having the activity into biological organisms, diseases due to the decrease of the enzyme protein, such as osteoporosis, can be treated therapeutically.
- (4) By using the DNA of the present invention, the mRNA of 25-hydroxyvitamin D3-1α-hydroxylase gene can be detected by Northern hybridization method (Molecular Cloning, 2-nd edition), PCR method [PCR Protocols, Academic Press (1990)], and RT-PCR method and the like.
- The diagnostic method for assaying the expression level of the mRNA of the gene of 25-hydroxyvitamin D3-1α-hydroxylase by utilizing the detection method, is useful for suppressing the onset of adult diseases such as osteoporosis induced by the decrease of active type vitamin D3 and is also effective for early diagnosis of genetic diseases due to congenital deficiency of the 25-hydroxyvitamin D3-1α-hydroxylase gene.
- According to Northern hybridization method, the expression level of mRNA is assayed on the basis of the label of a probe hybridized, for example, on the basis of the radioactivity in case of labeling with for example32P or the fluorescence in case of fluorescent labeling. The expression level of mRNA is assayed, on the basis of the fluorescence of a DNA specific fluorescent dye, for example ethidium bromide and
Cyber Green 1 which is used for staining amplified fragments. - (5) The DNA of the present invention is inserted into virus vectors such as retrovirus and adenovirus and other vectors, and the resulting DNA can be used for therapeutic treatment according to gene therapy.
- (6) By using the anti-25-hydroxyvitamin D3-1α-hydroxylase antibody of the present invention, 25-hydroxyvitamin D3-1α-hydroxylase can be detected and assayed in samples of blood, some organs, cells and the like. Specifically preferable methods therefor include ELISA method by using microtiter plates, fluorescent antibody methods, Western blot method and the like; additionally, immuno-histological staining by using pathological sections may also be utilized. Thus, the antibody of the present invention is useful for the diagnosis of diseases such as osteoporosis, due to the decrease of the expression of vitamin D3-1α-hydroxylase, the diagnosis of the onset thereof and early prediction of the possibility of the onset thereof and the like. Similarly, the antibody is also useful as a laboratory reagent for research works for the protein.
- (7) By using the antibody of the present invention, polypeptides having 25-hydroxyvitamin D3-1α-hydroxylase activity are immuno-histologically stained, and thus, an immuno-histological staining agent containing the antibody can be provided.
- (8) By using the DNA of the present invention and through the hybridization thereof with the genome DNA, the DNA in the promoter region of the gene can be cloned. By using DNA fragments in the promoter region, molecules involved in the regulation of the expression of the gene can be screened and analyzed.
- The present invention will now be described in detail in the following examples. When kits were used in individual procedures, experiments were progressed according to the protocols attached to the kits, unless otherwise stated specifically. Fundamental genetic manipulation techniques were according to Molecular Cloning, 2-nd edition.
- Preparation of Kidney from Rats Fed with Vitamin D3 Deficient Diet
- Immediately after weaning, four male SD rats were given vitamin D3 deficient diet for 3 weeks (age 6 weeks).
- DIET 11 [Suda, et. al., J. Nutrition, 100, 1049 (1970); commercially available as Purified diet for Rat from Teklad Co, Madison, Wis., USA] was used as the vitamin D3 deficient diet. The diet was vitamin D deficient and low calcium diet at a calcium content of 0.03% and a phosphate content of 0.6%.
- Deionized water was used for supplementing the rats with water.
- 48 hours prior to sacrifice, 1α, 25-dihydroxyvitamin D3 (manufactured by Calviochem, Co., Calif., USA) was intravenously injected at 1 μg/rat into the rats.
- After the designed dieting term was terminated, the rats were anesthetized with ether. From the abdominal aortas of the rats, blood was drawn out, and then, the rats were sacrificed to death by phlebotomy and immediately thereafter, the rats were autopsied to resect the kidneys.
- The kidneys were rinsed in PBS [containing NaCl (8 g), KCl (0.2 g), NaH.2PO412H2O (2.9 g) and KH2PO4 (0.2 g) per one liter), and the resulting kidneys were frozen in liquid nitrogen.
- As a control group, rats were given normal diet (Rat diet containing calcium (0.5 g), phosphate (0.6 g) and vitamin D3 (200 IU) per 100 g) in a similar fashion, and then, the kidneys were prepared by the same method as described above. The resulting kidneys were used as kidneys from rats with no activity induction.
- Preparation of mRNA from Rat Kidneys
- The kidneys prepared from the rats fed with the vitamin D3 deficient diet and the kidneys derived from the rats fed with normal diet, weighed 0.78 g and 0.94 g, respectively, were rinsed in PBS and were then frozen in liquid nitrogen. The frozen kidneys can be stored at −80° C.
- The frozen kidneys were cut into pieces in liquid nitrogen with a wearing blender, until the tissues were hashed into sand size form. Then, the liquid nitrogen was evaporated.
- The sand-like tissues were homogenized in ice cooling with a homogenizer (Digital Homogenizer; manufactured by Inouchi, Co.), while adding thereto 35 ml of 5.5 M GTC solution (containing 324.5 g of guanidine isothiocyanate, 3.7 g of sodium citrate, and 3.3 g of Sarkosyl in 500 ml) and 492 μl of 2-mercaptoethanol, and the homogenate in suspension was passed four times through an injection needle of gauge 18 arranged on a 50-ml injection cylinder.
- The suspension was then transferred into a 15-ml centrifuge tube, for centrifugation at 6,000 rpm at 20° C. for 10 minutes, to recover the supernatant.
- The supernatant was then overlaid in 16-ml portions on a CsTFA preparative solution [a mixture solution of CsTFA solution (100 ml) manufactured by Pharmacia, Co., 82.06 ml of 0.25 M EDTA solution (pH 7.0), and 23.09 ml of H2O] in a 40-ml polyallomer tube for ultracentrifugation, and the tube was then ultra-centrifuged under conditions of 25,000 rpm and 18° C. for 25 hours.
- After discarding the supernatant, the tube was cut at the position of about 1.5 cm from the bottom of the tube, and the resulting precipitate was dissolved in 0.6 ml of 4M GTC solution [a mixture solution of 5.5M GTC solution (4 ml), 1.5 ml of H2O, and 56 μl of 2-mercaptoethanol].
- The dissolved solution was centrifuged at 14,000 rpm for 15 seconds, to recover the supernatant.
- After adding 15 μl of 1M sodium acetate and 0.45 ml of ethanol to the supernatant and thereby suspending the precipitate, the resulting suspension was centrifuged to recover the precipitate.
- The precipitate was rinsed in 70% ethanol, suspended in 1 ml of TE buffer [10 mM Tris-HCl (pH 8.0), 1 mM EDTA-NaOH (pH 8.0)], and centrifuged at 14,000 rpm for 15 seconds, to recover the supernatant.
- Adding a 2.5-fold volume of 70% ethanol to the supernatant, followed by centrifugation, the resulting precipitate was recovered.
- The precipitate was rinsed in 70% ethanol and was then dissolved in 500 μl of TE buffer.
- Through the procedure, the whole RNA was recovered from the kidneys from the rats with activity induction and the rats with no activity induction, which was calculated as 639 μg and 918 μg, respectively, on the basis of the absorbance at 260 nm.
- The whole RNA solution (150 μl) derived from the rats with activity induction was effected with thermal treatment at 65° C. for 5 minutes, which was immediately cooled in ice.
- To the solution were added 0.5 ml of 5M NaCl and 0.15 g oligo dT cellulose (manufactured by Collaborative Research, Co., Type 3) equilibrated with TE/NaCl [10 mM Tris-HCl (pH 7.5), 500 mM NaCl], to adsorb the whole RNA onto the cellulose.
- The cellulose was packed in a column, through which the TE/NaCl solution was passed for washing the column, followed by elution of mRNA with TE solution of 0.5 ml, to fractionate and collect the eluate in 200 μl-fractions.
- From the individual fractionated solutions, 2 μl portions were sampled, followed by addition of 1 μg/ml ethidium bromide (20 μl), to detect luminescent sampled solutions under ultraviolet irradiation.
- Ethanol was added to the fractionated solutions corresponding to the luminescent sampled solutions, to recover precipitates.
- The precipitates were rinsed in 80% ethanol and suspended in TE buffer.
- Through the procedures, mRNA of 14.3 μg was recovered from the kidneys of the rats with activity induction.
- Preparation of cDNA Library
- By using ZAP-cDNA synthesis kit (#200400) manufactured by Stratagene Co., a cDNA library was constructed according to the instruction manual attached to the kit.
- By using 4 μg of mRNA derived from the rats with activity induction as prepared in Example 2, fist strand DNA was synthesized through reverse-transcriptase reaction, and after RNase reaction, second strand DNA was synthesized with DNA polymerase I.
- Under high temperature conditions, PfuDNA polymerase reaction was effected to make the termini of the cDNA to blunt end.
- By ligating an EcoRI adapter fragment to the cDNA for phosphorylation and digesting the resulting cDNA with XhoI, a cDNA fragment with EcoRI-XhoI cleavage sites on both the termini was prepared.
- The cDNA fragment was inserted into the EcoRI-XhoI site of λ ZAP II, and by subsequent packaging with Giga pack Gold Packaging Kit (manufactured by Stratagene, Co.) and infection by usingEscherichia coli host XL1-Blue, MRF′ strain and helper phage VCS257, a cDNA library was constructed.
- Selection of a Clone Harbouring mRNA Molecule Specifically Expressed in the Kidneys of the Rats with Induced Activity
- The amino acid sequences of the rat-derived hydroxylase of the position 25 of vitamin D3 and the hydroxylase of the position 24 thereof were previously reported, and among the regions well preserved in these vitamin D3hydroxylases of the family P450, the partial amino acid sequences of the adrenodoxin binding region (region A) essential for the enzyme activity and of the hem binding region (region H) were selected, and on the basis of the DNA sequences were designed a sense primer and an antisense primer for PCR amplification of the gene in the regions.
- More specifically, DNA comprising the nucleotide sequence represented by SEQ ID No. 7 corresponding to the region A was used as the sense primer; and DNA comprising the nucleotide sequence represented by SEQ ID NO. 8 corresponding to the region H was used as the antisense primer.
- By using the ZAP-cDNA synthesis kit (#200400) manufactured by Stratagene Co. and 4 μg of the mRNA derived from the rats having activity induction, first strand DNA was synthesized with a primer random hexamer.
- By using the first strand DNA as the template, the DNA comprising the nucleotide sequence represented by SEQ ID NO. 7 as the sense primer and the DNA comprising the nucleotide sequence represented by SEQ ID NO. 8 as the antisense primer and by utilizing RT-PCR kit manufactured by Stratagene, Co., PCR was effected.
- By using DNA Thermal Cycler 480 manufactured by Perkin Elmer, Co., PCR was effected at 35 cycles, each cycle composed of 94° C. for 30 seconds, 42° C. for one minute and 72° C. for one minute.
- The reaction product was analyzed by agarose gel electrophoresis, and a 255-bp amplification fragment (AH fragment) was observed. By using a DNA purification kit (manufactured by Bio Rad, Co.), the fragment was extracted from agarose, which was then inserted into pCRII vector (manufactured by Invitrogen, Co.).
- From the whole RNAs derived from the rats induced with 25-hydroxyvitamin D3-1α-hydroxylase activity and the non-induced rats were prepared poly(A) +RNAs, which were then subject individually to agarose electrophoresis, to transfer the electrophoresed mRNAs onto membrane filters in a conventional manner.
- By using these membrane filters, Northern hybridization was effected by using the amplified AH fragment as the probe.
- The amplified AH fragment was hybridized only when the membrane filter prepared from the mRNA derived from the rats with activity induction was used.
- The AH fragment had nucleotide sequences corresponding to the regions A and H.
- By using the AH fragment and 3′ RACE system kit manufactured by BRL, Co., a PCR amplified fragment containing the 3′ noncoding region of the DNA encoding the 25-hydroxyvitamin D3-1α-hydroxylase was recovered by the following method.
- By using the Oligo dT/AUAP primer attached to the 3′ RACE system kit manufactured by BRL, Co. and 4 μg of the mRNA from the rats with activity induction as recovered in Example 2, cDNA was synthesized.
- The cDNA was used as a template.
- Based on the sequence of the AH fragment amplified above, DNA comprising the nucleotide sequence represented by SEQ ID NO. 9 was synthesized and used as a sense primer.
- The AUAP primer attached to the 3′ RACE system kit manufactured by BRL, Co. was used as an antisense primer.
- By using the template, the sense primer and the antisense primer, PCR was effected at 35 cycles, each cycle composed of 94° C. for one minute, 55° C. for one minute and 72° C. for 2 minutes.
- The reaction product was analyzed by agarose gel electrophoresis, and an amplified fragment of 1.3 kb (A3 fragment) was observed. By using a DNA purification kit (manufactured by Bio Rad, Co.), the fragment was extracted from agarose, which was then inserted into pCRII vector.
- In the same manner as for the AH fragment, the A3 fragment was specifically hybridized with the mRNA from the rats with activity induction.
- The A3 fragment contained almost whole length of the AH fragment.
- Recovery of DNA encoding 25-hydroxyvitamin D3-1α-hydroxylase.
- The cDNA phage library prepared in Example 3 was spread on an agar medium and cultivated to a final concentration of 10,000 to 20,000 plaques per one petri dish.
- HybondN+ membrane (manufactured by Amersham, Co.) was placed on each of the petri dishes with the plaques formed thereon, to transfer the plaque DNA onto the membrane. Two transcription membranes were prepared per one petri dish.
- The transcription membranes were subject to alkali treatment (immersion in 1.5 M NaCl and 0.5 M NaOH) and SDS treatment (immersion in 2×SSC and 0.1% SDS solution), rinsed and dried, and then, the resulting membranes with plaque DNA immobilized thereon were used as blotting membranes for the following hybridization.
- By using DIG labeling kit.(#1 175 033; manufactured by Boehringer Mannheim, Co.) and 2 ng each of the AH fragment and A3 fragment as templates, PCR was effected, to recover DIG labeled AH fragment or A3 fragment.
- PCR was effected under conditions of 30 cycles, each cycle of a process of 94° C. for one minute, 50° C. for one minute and 72° C. for one minute.
- The resulting DIG labeled AH fragment and DIG labeled A3 fragment were used as the following probes.
- The blotting membranes prepared above were immersed in a hybridization solution [5×SSC, 0.1% Sarkosyl, 0.02% SDS, 1% hybridization blocking solution (manufactured by Boehringer Mannheim, Co.)] at 60° C. for 5 hours, followed by addition of thermally treated DIG labeled probe (10 μl/10 ml-hybridization solution), for overnight hybridization at 65° C.
- After hybridization, the membranes were subject to rinsing (rinsing twice in 2×SSC and 0.1% SDS at room temperature for 5 minutes, rinsing twice in 0.1×SSC and 0.1% SDS at 60° C. for 15 minutes), blocking [effected by using 1×blocking solution (manufactured by Boehringer Mannheim, Co.), 0.1M maleic acid, 0.15M NaCl, pH 7.5], reaction with AP labeled anti-DIG antibody (effected according to the protocol by Boehringer Mannheim, Co.), and alkali treatment [0.1M Tris-HCl (pH 9.5), 0.1M NaCl and 50 mM MgCl2], and by using thereafter DIG luminescence detection kit (#1 363 514; manufactured by Boehringer Mannheim, Co.), plaques hybridizable with the probes were screened on an X-ray film.
- By using firstly the DIG labeled AH fragment as the DIG labeled probe to select plaques hybridizable with the fragment and by subsequently using the DIG labeled A3 fragment, plaques hybridizable with the fragment were selected from the plaques described above.
- The plaques selected at each stage were again inoculated on petri dishes, and then, it was confirmed that these were hybridizable. By PCR using both the primers of the region A and AUAP, additionally, it was confirmed that the plaques had the nucleotide sequence of the A3 fragment.
- After screening of 35 petri dishes in total, finally, four plaques (Nos. 221, 522, 411, 111) were selected.
- From individual plaque clones was extracted DNA, which was then ligated to pBluescript vector by using rapid excision kit (#211204; manufactured by Stratagene, Co.), and subsequently, the nucleotide sequence of DNA inserted into the clone was analyzed by using M13 primer.
- By the analysis with the clone No. 221, DNA comprising a nucleotide sequence of 2469 bp was observed, as represented by SEQ ID No. 5.
- An open reading frame (referred to as ORF hereinafter) encoding 501 amino acids was observed in the DNA, in which amino acid sequences believed as the hem binding region and adrenodoxin binding region in common with the P450 family protein were present.
- Expression of Isolated 25-hydroxyvitamin D3-1α-hydroxylase Gene in Animal Cells
- From the clone No. 221 described in Example 5 was prepared a plasmid, which was subsequently digested with HindIII and XbaI. Expression vector pcDNA3 (manufactured by Invitrogen, Co.) for animal cells was similarly digested with HindIII and XbaI.
- The cleavage fragments recovered above were individually subject to agarose electrophoresis, which were thereby separated and extracted.
- The resulting DNA fragments from the vector and the inserted gene fragment were ligated together, by using a DNA ligation kit(manufactured by TaKaRa Brewery), to recover a ligated plasmid.
- By using the plasmid,Escherichia coli strain DH5α was transformed, and thereafter, an ampicillin resistant strain was selected, from which the plasmid was extracted according to a known method.
- Based on the analysis of the plasmid by restriction cleavage, it was confirmed that the plasmid inserted the objective gene. The plasmid was named pCMD3R.
- By electroporation [Potter et. al., Proc. Natl. Acad. Sci. USA, 81, 716 (1984)], pCMD3R was introduced into an animal cell, to be expressed therein as follows. COS7 cell was cultivated in a DMEM culture medium (manufactured by GIBCO BRL, Co.) supplemented with 10% FCS (fetal calf serum) in a petri dish for 2 days.
- After cultivation, the cells were peeled off from the petri dish by trypsin treatment, and the cells were rinsed in PBS and then suspended in 0.5 ml of KPBS (137 mM KCl 2.7 mM NaCl, 8.1 mM Na2HPO41.5 mM NaH2PO4 4 mM MgCl2), to a final concentration of 2 to 6.0×106/ml.
- The suspension and 15 μg of pCMD3R plasmid were mixed together in a pulser cuvette (manufactured by BIO-RAD, Co.) with a groove width of 0.4 cm, and the resulting mixture was then applied to an electroporation system Gene pulser (manufactured by BIO-RAD, Co.) for pulse loading under conditions of 960 μF and 0.22 kV, to introduce the DNA into the cell.
- The DNA introduced cell was suspended in 10 ml of DMEM culture medium containing 10% FCS, for cultivation in a 5% CO2 incubator at 37° C. for 48 to 72 hours.
- By discarding the culture in the petri dish and rinsing the cell twice in PBS, the cell was scraped off with a scraper, followed by centrifugation to collect the cell.
- Recovery of human-derived 25-hydroxyvitamin D3-1α-hydroxylase gene
- From 1.2 g of tissue resected from human kidney cancer, the whole RNA (750 μg) was recovered according to the method described in Example 2, and 9.5 μg of mRNA was recovered from the whole RNA.
- By using 5 μg of the mRNA, a human cDNA library was constructed by the method described in Example 3.
- According to the method described in Example 5, DNA encoding the human derived 25-hydroxyvitamin D3-1α-hydroxylase was recovered.
- The whole length of the rat vitamin D3hydroxylase gene of 2469 bp as isolated in Example 5 was DIG labeled according to the method described in Example 5, which was then used as a probe.
- Hybridization was effected overnight in a hybridization solution containing formamide at 40% under a condition of 42° C.
- Through the hybridization, four clones were selected.
- According to the method described in Example 5, DNA was extracted from these clones, to analyze the nucleotide sequence of the DNA inserted into the clones.
- The DNA had the nucleotide sequence represented by SEQ ID NO. 6. In the DNA fragment was observed ORF encoding a peptide of 508 amino acids.
- The peptide had an amino acid sequence in common with the rat-derived 25-hydroxyvitamin D3-1α-hydroxylase in terms of 413 amino acid residues, and contained amino acid sequences possibly corresponding to the hem binding region and adrenodoxin binding region, commonly observed in the P450 family protein.
- Additionally, the DNA sequence included a sequence of 1724 residues, which is the same as the sequence derived from rats, and therefore, it was indicated that the DNA had high homology.
- Expression of Rat-derived Vitamin D3-1α-hydroxylase Gene and Assay of the Activity
- According to the method of Example 6, gene expression plasmid carrying the rat-derived vitamin D3-1α-hydroxylase gene, namely pCMD3R, was introduced into COS-7 cell by electroporation.
- The gene-introduced cells of 5×105 in number were cultivated in 10 ml of a DMEM culture medium containing 10% FCS for 24 hours, and then, the culture medium was exchanged to a DMEM culture medium (8 ml) containing 1% FCS, followed by addition of [26, 27-3H]-25-hydroxyvitamin D3(manufactured by Amersham, Co.) at 2000 Bq/3 μl-methanol solution, and then, the resulting mixture was cultivated for 24 hours.
- After cultivation, vitamin D3 metabolites were extracted from the culture supernatant and the cells by the Bligh & Dyer's method [Can. J. Biochem., 37, 911 (1959)]. More specifically, the culture was transferred into a 50-ml centrifuge tube equipped with a screw cap, while 10 ml methanol was added into the petri dish, to scrape the cells with a scraper, and the cells were then transferred into the centrifuge tube. Methanol (10 ml) was again added into the petri dish, to suspend the cells remaining in the petri dish, and the resulting suspension was thoroughly transferred into the centrifuge tube.
- Chloroform (10 ml) was added into the centrifuge tube for thorough mixing, followed by further addition of 10 ml of chloroform and subsequent complete re-mixing, and the resulting tube was left to stand to separate a chloroform layer from an aqueous layer.
- The chloroform extract solution in the separated chloroform layer was placed in another centrifuge tube, followed by further addition of 10 ml of chloroform to the remaining aqueous layer, for mixing and extraction in the same manner, and the resulting chloroform extract solution was combined together with the previously recovered chloroform extract solution.
- Distilled water was added into the chloroform extract solution to a final total volume of 60 ml, followed by addition of two drops of saturated sodium chloride solution and subsequent sufficient mixing.
- The mixture solution was centrifuged, to separate the chloroform layer from the aqueous layer.
- The resulting chloroform layer fraction was concentrated in nitrogen gas stream to recover the residue.
- The residue was dissolved in 400 μl of a mixture solution iso-propanol/methanol/n-hexane=6:6:88.
- With HPLC system 880 PU manufactured by JASCO, Co. with TSK silica gel 150 column (4.6×250 mm; manufactured by Toso, Co.) arranged thereon, the resulting solution was subject to analysis under conditions such that the mixture solution iso-propanol/methanol/n-hexane=6:6:88 was used as the mobile phase at a flow rate of 1 ml/minute. On comparison with the elution time of a standard substance, vitamin D3 metabolites were identified.
- Similarly, vitamin D3 metabolites were identified by using a vector pcDNA3 which does not carry the gene of the present invention.
- The results are shown in FIG. 1.
- “A” represents the analytical results of metabolites in the cells introduced with pcMD3R; and “B” represents the analytical results of metabolites in the cells introduced with pcDNA3. Because 1α, 25-hydroxyvitamin D3 was detected only in the cells introduced with pcMD3R carrying the gene of the present invention, it was indicated that only the cells had 25-hydroxyvitamin D3-1α-hydroxylase activity, which further indicates that the gene of the present invention encodes 25-hydroxyvitamin D3-1α-hydroxylase.
- In accordance with the present invention, the following can be provided; a polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity, being useful for the prevention, diagnosis and therapeutic treatment of adult diseases such as osteoporosis induced by the decrease of active type vitamin D3, DNA encoding the polypeptide, a recombinant DNA prepared by inserting the DNA in a vector, a transformant carrying the recombinant DNA, a method for preparing 25-hydroxyvitamin D3-1α-hydroxylase by using the transformant, a method for preparing 1α, 25-dihydroxyvitamin D3 by using the polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity, and an antibody recognizing the polypeptide.
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1 9 1 501 PRT Rat 1 Met Thr Gln Ala Val Lys Leu Ala Ser Arg Val Phe His Arg Val Gln 1 5 10 15 Leu Pro Ser Gln Leu Gly Ser Asp Ser Val Leu Arg Ser Leu Ser Asp 20 25 30 Ile Pro Gly Pro Ser Thr Pro Ser Phe Leu Ala Glu Leu Phe Cys Lys 35 40 45 Gly Gly Leu Ser Arg Leu His Glu Leu Gln Val His Gly Ala Ala Arg 50 55 60 Tyr Gly Pro Ile Trp Ser Gly Ser Phe Gly Thr Leu Arg Thr Val Tyr 65 70 75 80 Val Ala Asp Pro Ala Leu Val Glu Gln Leu Leu Arg Gln Glu Ser His 85 90 95 Cys Pro Glu Arg Cys Ser Phe Ser Ser Trp Ser Glu His Arg Arg Arg 100 105 110 His Gln Arg Ala Cys Gly Leu Leu Thr Ala Asp Gly Glu Glu Trp Gln 115 120 125 Arg Leu Arg Ser Leu Leu Ala Pro Leu Leu Leu Arg Pro Gln Ala Ala 130 135 140 Ala Gly Tyr Ala Gly Thr Leu Asp Ser Val Val Ser Asp Leu Val Arg 145 150 155 160 Arg Leu Arg Arg Gln Arg Gly Arg Gly Ser Gly Leu Pro Asp Leu Val 165 170 175 Leu Asp Val Ala Gly Glu Phe Tyr Lys Phe Gly Leu Glu Gly Ile Gly 180 185 190 Ala Val Leu Leu Gly Ser Arg Leu Gly Cys Leu Glu Ala Glu Val Pro 195 200 205 Pro Asp Thr Glu Thr Phe Ile Glu Ala Val Gly Ser Val Phe Val Ser 210 215 220 Thr Leu Leu Thr Met Ala Met Pro Ser Trp Leu His Arg Leu Ile Pro 225 230 235 240 Gly Pro Trp Ala Arg Leu Cys Arg Asp Trp Asp Gln Met Phe Ala Phe 245 250 255 Ala Gln Lys His Val Glu Gln Arg Glu Gly Glu Ala Ala Val Arg Asn 260 265 270 Gln Gly Lys Pro Glu Glu Asp Leu Pro Thr Gly His His Leu Thr His 275 280 285 Phe Leu Phe Arg Glu Lys Val Ser Val Gln Ser Ile Val Gly Asn Val 290 295 300 Thr Glu Leu Leu Leu Ala Gly Val Asp Thr Val Ser Asn Thr Leu Ser 305 310 315 320 Trp Ala Leu Tyr Glu Leu Ser Arg His Pro Glu Val Gln Ser Ala Leu 325 330 335 His Ser Glu Ile Thr Gly Ala Val Asn Pro Gly Ser Tyr Ala His Leu 340 345 350 Gln Ala Thr Ala Leu Ser Gln Leu Pro Leu Leu Lys Ala Val Ile Lys 355 360 365 Glu Val Leu Arg Leu Tyr Pro Val Val Pro Gly Asn Ser Arg Val Pro 370 375 380 Asp Arg Asp Ile Cys Val Gly Asn Tyr Val Ile Pro Gln Asp Thr Leu 385 390 395 400 Val Ser Leu Cys His Tyr Ala Thr Ser Arg Asp Pro Ala Gln Phe Arg 405 410 415 Glu Pro Asn Ser Phe Asn Pro Ala Arg Trp Leu Gly Glu Gly Pro Ala 420 425 430 Pro His Pro Phe Ala Ser Leu Pro Phe Gly Phe Gly Lys Arg Ser Cys 435 440 445 Ile Gly Arg Arg Leu Ala Glu Leu Glu Leu Gln Met Ala Leu Ala Gln 450 455 460 Ile Leu Thr His Phe Glu Val Leu Pro Glu Pro Gly Ala Leu Pro Val 465 470 475 480 Lys Pro Met Thr Arg Thr Val Leu Val Pro Glu Arg Ser Ile His Leu 485 490 495 Gln Phe Val Asp Arg 500 2 508 PRT human 2 Met Thr Gln Thr Leu Lys Tyr Ala Ser Arg Val Phe His Arg Val Arg 1 5 10 15 Trp Ala Pro Glu Leu Gly Ala Ser Leu Gly Tyr Arg Glu Tyr His Ser 20 25 30 Ala Arg Arg Ser Leu Ala Asp Ile Pro Gly Pro Ser Thr Pro Ser Phe 35 40 45 Leu Ala Glu Leu Phe Cys Lys Gly Gly Leu Ser Arg Leu His Glu Leu 50 55 60 Gln Val Gln Gly Ala Ala His Phe Gly Pro Val Trp Leu Ala Ser Phe 65 70 75 80 Gly Thr Val Arg Thr Val Tyr Val Ala Ala Pro Ala Leu Val Glu Glu 85 90 95 Leu Leu Arg Gln Glu Gly Pro Arg Pro Glu Arg Cys Ser Phe Ser Pro 100 105 110 Trp Thr Glu His Arg Arg Cys Arg Gln Arg Ala Cys Gly Leu Leu Thr 115 120 125 Ala Glu Gly Glu Glu Trp Gln Arg Leu Arg Ser Leu Leu Ala Pro Leu 130 135 140 Leu Leu Arg Pro Gln Ala Ala Ala Arg Tyr Ala Gly Thr Leu Asn Asn 145 150 155 160 Val Val Cys Asp Leu Val Arg Arg Leu Arg Arg Gln Arg Gly Arg Gly 165 170 175 Thr Gly Pro Pro Ala Leu Val Arg Asp Val Ala Gly Glu Phe Tyr Lys 180 185 190 Phe Gly Leu Glu Gly Ile Ala Ala Val Leu Leu Gly Ser Arg Leu Gly 195 200 205 Cys Leu Glu Ala Gln Val Pro Pro Asp Thr Glu Thr Phe Ile Arg Ala 210 215 220 Val Gly Ser Val Phe Val Ser Thr Leu Leu Thr Met Ala Met Pro His 225 230 235 240 Trp Leu Arg His Leu Val Pro Gly Pro Trp Gly Arg Leu Cys Arg Asp 245 250 255 Trp Asp Gln Met Phe Ala Phe Ala Gln Arg His Val Glu Arg Arg Glu 260 265 270 Ala Glu Ala Ala Met Arg Asn Gly Gly Gln Pro Glu Lys Asp Leu Glu 275 280 285 Ser Gly Ala His Leu Thr His Phe Leu Phe Arg Glu Glu Leu Pro Ala 290 295 300 Gln Ser Ile Leu Gly Asn Val Thr Glu Leu Leu Leu Ala Gly Val Asp 305 310 315 320 Thr Val Ser Asn Thr Leu Ser Trp Ala Leu Tyr Glu Leu Ser Arg His 325 330 335 Pro Glu Val Gln Thr Ala Leu His Ser Glu Ile Thr Ala Ala Leu Ser 340 345 350 Pro Gly Ser Ser Ala Tyr Pro Ser Ala Thr Val Leu Ser Gln Leu Pro 355 360 365 Leu Leu Lys Ala Val Val Lys Glu Val Leu Arg Leu Tyr Pro Val Val 370 375 380 Pro Gly Asn Ser Arg Val Pro Asp Lys Asp Ile His Val Gly Asp Tyr 385 390 395 400 Ile Ile Pro Lys Asn Thr Leu Val Thr Leu Cys His Tyr Ala Thr Ser 405 410 415 Arg Asp Pro Ala Gln Phe Pro Glu Pro Asn Ser Phe Arg Pro Ala Arg 420 425 430 Trp Leu Gly Glu Gly Pro Thr Pro His Pro Phe Ala Ser Leu Pro Phe 435 440 445 Gly Phe Gly Lys Arg Ser Cys Met Gly Arg Arg Leu Ala Glu Leu Glu 450 455 460 Leu Gln Met Ala Leu Ala Gln Ile Leu Thr His Phe Glu Val Gln Pro 465 470 475 480 Glu Pro Gly Ala Ala Pro Val Arg Pro Lys Thr Arg Thr Val Leu Val 485 490 495 Pro Glu Arg Ser Ile Asn Leu Gln Phe Leu Asp Arg 500 505 3 1503 DNA Rat CDS (1)..(1503) 3 atg acc cag gca gtc aag ctc gcc tcc aga gtc ttc cat cga gtc caa 48 Met Thr Gln Ala Val Lys Leu Ala Ser Arg Val Phe His Arg Val Gln 1 5 10 15 ctg cct tct cag ctg ggc agt gac tcg gtt ctc cgg agt tta tct gat 96 Leu Pro Ser Gln Leu Gly Ser Asp Ser Val Leu Arg Ser Leu Ser Asp 20 25 30 atc cct ggg ccc tct aca cct agc ttc ctg gct gaa ctc ttc tgc aaa 144 Ile Pro Gly Pro Ser Thr Pro Ser Phe Leu Ala Glu Leu Phe Cys Lys 35 40 45 ggg ggg ctg tcc agg cta cat gaa ctg cag gtg cat ggc gct gcg cgg 192 Gly Gly Leu Ser Arg Leu His Glu Leu Gln Val His Gly Ala Ala Arg 50 55 60 tac ggg cca ata tgg tcc ggc agc ttc ggg aca ctt cgc aca gtt tat 240 Tyr Gly Pro Ile Trp Ser Gly Ser Phe Gly Thr Leu Arg Thr Val Tyr 65 70 75 80 gtg gcc gac cct gca ctt gta gag cag ctc ctg cga caa gaa agt cat 288 Val Ala Asp Pro Ala Leu Val Glu Gln Leu Leu Arg Gln Glu Ser His 85 90 95 tgt cca gag cgc tgt agt ttc tca tct tgg tca gag cac cgt cgc cgc 336 Cys Pro Glu Arg Cys Ser Phe Ser Ser Trp Ser Glu His Arg Arg Arg 100 105 110 cac cag cgg gct tgc ggg ttg cta acg gcg gat ggt gaa gaa tgg cag 384 His Gln Arg Ala Cys Gly Leu Leu Thr Ala Asp Gly Glu Glu Trp Gln 115 120 125 agg ctc cga agt ctc ctg gcc ccg cta ctc ctc cga cct caa gca gcc 432 Arg Leu Arg Ser Leu Leu Ala Pro Leu Leu Leu Arg Pro Gln Ala Ala 130 135 140 gcc ggc tat gct gga act ctg gac agc gtg gtc agt gac ctc gtg cga 480 Ala Gly Tyr Ala Gly Thr Leu Asp Ser Val Val Ser Asp Leu Val Arg 145 150 155 160 cga cta agg cgc cag cgg gga cgt ggc tct ggg cta ccg gac cta gtt 528 Arg Leu Arg Arg Gln Arg Gly Arg Gly Ser Gly Leu Pro Asp Leu Val 165 170 175 ctg gac gtg gcg gga gag ttt tac aaa ttt ggc cta gaa ggc ata ggc 576 Leu Asp Val Ala Gly Glu Phe Tyr Lys Phe Gly Leu Glu Gly Ile Gly 180 185 190 gcg gtg ctg ctg gga tcg cgc ctg ggc tgc ctg gag gct gaa gtt cct 624 Ala Val Leu Leu Gly Ser Arg Leu Gly Cys Leu Glu Ala Glu Val Pro 195 200 205 ccc gac aca gaa acc ttc att gag gcc gtg ggc tcg gtg ttt gtg tct 672 Pro Asp Thr Glu Thr Phe Ile Glu Ala Val Gly Ser Val Phe Val Ser 210 215 220 aca ctc ttg acc atg gca atg ccc agt tgg ctg cac cgc ctt ata ccc 720 Thr Leu Leu Thr Met Ala Met Pro Ser Trp Leu His Arg Leu Ile Pro 225 230 235 240 gga ccc tgg gcc cgc ctc tgc aga gac tgg gat cag atg ttt gcc ttt 768 Gly Pro Trp Ala Arg Leu Cys Arg Asp Trp Asp Gln Met Phe Ala Phe 245 250 255 gcc cag aag cac gtg gag cag cgc gaa ggc gaa gct gcc gtg agg aac 816 Ala Gln Lys His Val Glu Gln Arg Glu Gly Glu Ala Ala Val Arg Asn 260 265 270 cag gga aag cct gag gag gat ttg cca acg ggg cat cac tta acc cac 864 Gln Gly Lys Pro Glu Glu Asp Leu Pro Thr Gly His His Leu Thr His 275 280 285 ttc ctt ttt cgg gaa aag gtg tct gtc cag tcc ata gtg gga aat gtg 912 Phe Leu Phe Arg Glu Lys Val Ser Val Gln Ser Ile Val Gly Asn Val 290 295 300 aca gag cta cta ctg gct gga gtg gac acg gta tcc aat acg ctc tcc 960 Thr Glu Leu Leu Leu Ala Gly Val Asp Thr Val Ser Asn Thr Leu Ser 305 310 315 320 tgg gca ctc tat gag ctc tcc cgg cac ccg gaa gtc cag tct gca ctc 1008 Trp Ala Leu Tyr Glu Leu Ser Arg His Pro Glu Val Gln Ser Ala Leu 325 330 335 cac tct gag atc aca ggc gct gtg aac cct ggc tcc tat gcc cac ctc 1056 His Ser Glu Ile Thr Gly Ala Val Asn Pro Gly Ser Tyr Ala His Leu 340 345 350 caa gcc act gct ctg tcc cag cta ccc ctg cta aag gct gtg atc aaa 1104 Gln Ala Thr Ala Leu Ser Gln Leu Pro Leu Leu Lys Ala Val Ile Lys 355 360 365 gaa gtg ttg aga ttg tac cct gtg gta cct ggg aac tcc cgt gtc cca 1152 Glu Val Leu Arg Leu Tyr Pro Val Val Pro Gly Asn Ser Arg Val Pro 370 375 380 gac aga gac atc tgt gta gga aac tat gtt att ccc caa gat aca ctg 1200 Asp Arg Asp Ile Cys Val Gly Asn Tyr Val Ile Pro Gln Asp Thr Leu 385 390 395 400 gtt tcc ctc tgt cac tat gcc act tca agg gac ccc gcc cag ttt cgg 1248 Val Ser Leu Cys His Tyr Ala Thr Ser Arg Asp Pro Ala Gln Phe Arg 405 410 415 gaa ccc aac tct ttt aat cca gct cga tgg ctt gga gag ggt cca gcc 1296 Glu Pro Asn Ser Phe Asn Pro Ala Arg Trp Leu Gly Glu Gly Pro Ala 420 425 430 ccc cac cca ttt gca tct ctt cct ttt ggc ttt ggc aaa cga agt tgc 1344 Pro His Pro Phe Ala Ser Leu Pro Phe Gly Phe Gly Lys Arg Ser Cys 435 440 445 ata ggg aga cgc ttg gca gag ctc gag cta caa atg gcg ttg gcc cag 1392 Ile Gly Arg Arg Leu Ala Glu Leu Glu Leu Gln Met Ala Leu Ala Gln 450 455 460 atc ttg acc cat ttt gag gtg ctg cct gag cca ggt gct ctt cca gtc 1440 Ile Leu Thr His Phe Glu Val Leu Pro Glu Pro Gly Ala Leu Pro Val 465 470 475 480 aaa ccc atg acc cgg act gtc ctg gta cct gag agg agc atc cat ctc 1488 Lys Pro Met Thr Arg Thr Val Leu Val Pro Glu Arg Ser Ile His Leu 485 490 495 cag ttt gta gac aga 1503 Gln Phe Val Asp Arg 500 4 1524 DNA human CDS (1)..(1524) 4 atg acc cag acc ctc aag tac gcc tcc aga gtg ttc cat cgc gtc cgc 48 Met Thr Gln Thr Leu Lys Tyr Ala Ser Arg Val Phe His Arg Val Arg 1 5 10 15 tgg gcg ccc gag ttg ggc gcc tcc cta ggc tac cga gag tac cac tca 96 Trp Ala Pro Glu Leu Gly Ala Ser Leu Gly Tyr Arg Glu Tyr His Ser 20 25 30 gca cgc cgg agc ttg gca gac atc cca ggc ccc tct acg ccc agc ttt 144 Ala Arg Arg Ser Leu Ala Asp Ile Pro Gly Pro Ser Thr Pro Ser Phe 35 40 45 ctg gcc gaa ctt ttc tgc aag ggg ggg ctg tcg agg cta cac gag ctg 192 Leu Ala Glu Leu Phe Cys Lys Gly Gly Leu Ser Arg Leu His Glu Leu 50 55 60 cag gtg cag ggc gcc gcg cac ttc ggg ccg gtg tgg cta gcc agc ttt 240 Gln Val Gln Gly Ala Ala His Phe Gly Pro Val Trp Leu Ala Ser Phe 65 70 75 80 ggg aca gtg cgc acc gtg tac gtg gct gcc cct gca ctc gtc gag gag 288 Gly Thr Val Arg Thr Val Tyr Val Ala Ala Pro Ala Leu Val Glu Glu 85 90 95 ctg ctg cga cag gag gga ccc cgg ccc gag cgc tgc agc ttc tcg ccc 336 Leu Leu Arg Gln Glu Gly Pro Arg Pro Glu Arg Cys Ser Phe Ser Pro 100 105 110 tgg acg gag cac cgc cgc tgc cgc cag cgg gct tgc gga ctg ctc act 384 Trp Thr Glu His Arg Arg Cys Arg Gln Arg Ala Cys Gly Leu Leu Thr 115 120 125 gcg gaa ggc gaa gaa tgg caa agg ctc cgc agt ctc ctg gcc ccg ctc 432 Ala Glu Gly Glu Glu Trp Gln Arg Leu Arg Ser Leu Leu Ala Pro Leu 130 135 140 ctc ctc cgg cct caa gcg gcc gcc cgc tac gcc gga acc ctg aac aac 480 Leu Leu Arg Pro Gln Ala Ala Ala Arg Tyr Ala Gly Thr Leu Asn Asn 145 150 155 160 gta gtc tgc gac ctt gtg cgg cgt ctg agg cgc cag cgg gga cgt ggc 528 Val Val Cys Asp Leu Val Arg Arg Leu Arg Arg Gln Arg Gly Arg Gly 165 170 175 acg ggg ccg ccc gcc ctg gtt cgg gac gtg gcg ggg gaa ttt tac aag 576 Thr Gly Pro Pro Ala Leu Val Arg Asp Val Ala Gly Glu Phe Tyr Lys 180 185 190 ttc gga ctg gaa ggc atc gcc gcg gtt ctg ctc ggc tcg cgc ttg ggc 624 Phe Gly Leu Glu Gly Ile Ala Ala Val Leu Leu Gly Ser Arg Leu Gly 195 200 205 tgc ctg gag gct caa gtg cca ccc gac acg gag acc ttc atc cgc gct 672 Cys Leu Glu Ala Gln Val Pro Pro Asp Thr Glu Thr Phe Ile Arg Ala 210 215 220 gtg ggc tcg gtg ttt gtg tcc acg ctg ttg acc atg gcg atg ccc cac 720 Val Gly Ser Val Phe Val Ser Thr Leu Leu Thr Met Ala Met Pro His 225 230 235 240 tgg ctg cgc cac ctt gtg cct ggg ccc tgg ggc cgc ctc tgc cga gac 768 Trp Leu Arg His Leu Val Pro Gly Pro Trp Gly Arg Leu Cys Arg Asp 245 250 255 tgg gac cag atg ttt gca ttt gct cag agg cac gtg gag cgg cga gag 816 Trp Asp Gln Met Phe Ala Phe Ala Gln Arg His Val Glu Arg Arg Glu 260 265 270 gca gag gca gcc atg agg aac gga gga cag ccc gag aag gac ctg gag 864 Ala Glu Ala Ala Met Arg Asn Gly Gly Gln Pro Glu Lys Asp Leu Glu 275 280 285 tct ggg gcg cac ctg acc cac ttc ctg ttc cgg gaa gag ttg cct gcc 912 Ser Gly Ala His Leu Thr His Phe Leu Phe Arg Glu Glu Leu Pro Ala 290 295 300 cag tcc atc ctg gga aat gtg aca gag ttg cta ttg gcg gga gtg gac 960 Gln Ser Ile Leu Gly Asn Val Thr Glu Leu Leu Leu Ala Gly Val Asp 305 310 315 320 acg gtg tcc aac acg ctc tct tgg gct ctg tat gag ctc tcc cgg cac 1008 Thr Val Ser Asn Thr Leu Ser Trp Ala Leu Tyr Glu Leu Ser Arg His 325 330 335 ccc gaa gtc cag aca gca ctc cac tca gag atc aca gct gcc ctg agc 1056 Pro Glu Val Gln Thr Ala Leu His Ser Glu Ile Thr Ala Ala Leu Ser 340 345 350 cct ggc tcc agt gcc tac ccc tca gcc act gtt ctg tcc cag ctg ccc 1104 Pro Gly Ser Ser Ala Tyr Pro Ser Ala Thr Val Leu Ser Gln Leu Pro 355 360 365 ctg ctg aag gcg gtg gtc aag gaa gtg cta aga ctg tac cct gtg gta 1152 Leu Leu Lys Ala Val Val Lys Glu Val Leu Arg Leu Tyr Pro Val Val 370 375 380 cct gga aat tct cgt gtc cca gac aaa gac att cat gtg ggt gac tat 1200 Pro Gly Asn Ser Arg Val Pro Asp Lys Asp Ile His Val Gly Asp Tyr 385 390 395 400 att atc ccc aaa aat acg ctg gtc act ctg tgt cac tat gcc act tca 1248 Ile Ile Pro Lys Asn Thr Leu Val Thr Leu Cys His Tyr Ala Thr Ser 405 410 415 agg gac cct gcc cag ttc cca gag cca aat tct ttt cgt cca gct cgc 1296 Arg Asp Pro Ala Gln Phe Pro Glu Pro Asn Ser Phe Arg Pro Ala Arg 420 425 430 tgg ctg ggg gag ggt ccc acc ccc cac cca ttt gca tct ctt ccc ttt 1344 Trp Leu Gly Glu Gly Pro Thr Pro His Pro Phe Ala Ser Leu Pro Phe 435 440 445 ggc ttt ggc aag cgc agc tgt atg ggg aga cgc ctg gca gag ctt gaa 1392 Gly Phe Gly Lys Arg Ser Cys Met Gly Arg Arg Leu Ala Glu Leu Glu 450 455 460 ttg caa atg gct ttg gcc cag atc cta aca cat ttt gag gtg cag cct 1440 Leu Gln Met Ala Leu Ala Gln Ile Leu Thr His Phe Glu Val Gln Pro 465 470 475 480 gag cca ggt gcg gcc cca gtt aga ccc aag acc cgg act gtc ctg gta 1488 Glu Pro Gly Ala Ala Pro Val Arg Pro Lys Thr Arg Thr Val Leu Val 485 490 495 cct gaa agg agc atc aac cta cag ttt ttg gac aga 1524 Pro Glu Arg Ser Ile Asn Leu Gln Phe Leu Asp Arg 500 505 5 2469 DNA Rat CDS (24)..(1526) 5 gagcagactc ctcaaacaca aac atg acc cag gca gtc aag ctc gcc tcc aga 53 Met Thr Gln Ala Val Lys Leu Ala Ser Arg 1 5 10 gtc ttc cat cga gtc caa ctg cct tct cag ctg ggc agt gac tcg gtt 101 Val Phe His Arg Val Gln Leu Pro Ser Gln Leu Gly Ser Asp Ser Val 15 20 25 ctc cgg agt tta tct gat atc cct ggg ccc tct aca cct agc ttc ctg 149 Leu Arg Ser Leu Ser Asp Ile Pro Gly Pro Ser Thr Pro Ser Phe Leu 30 35 40 gct gaa ctc ttc tgc aaa ggg ggg ctg tcc agg cta cat gaa ctg cag 197 Ala Glu Leu Phe Cys Lys Gly Gly Leu Ser Arg Leu His Glu Leu Gln 45 50 55 gtg cat ggc gct gcg cgg tac ggg cca ata tgg tcc ggc agc ttc ggg 245 Val His Gly Ala Ala Arg Tyr Gly Pro Ile Trp Ser Gly Ser Phe Gly 60 65 70 aca ctt cgc aca gtt tat gtg gcc gac cct gca ctt gta gag cag ctc 293 Thr Leu Arg Thr Val Tyr Val Ala Asp Pro Ala Leu Val Glu Gln Leu 75 80 85 90 ctg cga caa gaa agt cat tgt cca gag cgc tgt agt ttc tca tct tgg 341 Leu Arg Gln Glu Ser His Cys Pro Glu Arg Cys Ser Phe Ser Ser Trp 95 100 105 tca gag cac cgt cgc cgc cac cag cgg gct tgc ggg ttg cta acg gcg 389 Ser Glu His Arg Arg Arg His Gln Arg Ala Cys Gly Leu Leu Thr Ala 110 115 120 gat ggt gaa gaa tgg cag agg ctc cga agt ctc ctg gcc ccg cta ctc 437 Asp Gly Glu Glu Trp Gln Arg Leu Arg Ser Leu Leu Ala Pro Leu Leu 125 130 135 ctc cga cct caa gca gcc gcc ggc tat gct gga act ctg gac agc gtg 485 Leu Arg Pro Gln Ala Ala Ala Gly Tyr Ala Gly Thr Leu Asp Ser Val 140 145 150 gtc agt gac ctc gtg cga cga cta agg cgc cag cgg gga cgt ggc tct 533 Val Ser Asp Leu Val Arg Arg Leu Arg Arg Gln Arg Gly Arg Gly Ser 155 160 165 170 ggg cta ccg gac cta gtt ctg gac gtg gcg gga gag ttt tac aaa ttt 581 Gly Leu Pro Asp Leu Val Leu Asp Val Ala Gly Glu Phe Tyr Lys Phe 175 180 185 ggc cta gaa ggc ata ggc gcg gtg ctg ctg gga tcg cgc ctg ggc tgc 629 Gly Leu Glu Gly Ile Gly Ala Val Leu Leu Gly Ser Arg Leu Gly Cys 190 195 200 ctg gag gct gaa gtt cct ccc gac aca gaa acc ttc att gag gcc gtg 677 Leu Glu Ala Glu Val Pro Pro Asp Thr Glu Thr Phe Ile Glu Ala Val 205 210 215 ggc tcg gtg ttt gtg tct aca ctc ttg acc atg gca atg ccc agt tgg 725 Gly Ser Val Phe Val Ser Thr Leu Leu Thr Met Ala Met Pro Ser Trp 220 225 230 ctg cac cgc ctt ata ccc gga ccc tgg gcc cgc ctc tgc aga gac tgg 773 Leu His Arg Leu Ile Pro Gly Pro Trp Ala Arg Leu Cys Arg Asp Trp 235 240 245 250 gat cag atg ttt gcc ttt gcc cag aag cac gtg gag cag cgc gaa ggc 821 Asp Gln Met Phe Ala Phe Ala Gln Lys His Val Glu Gln Arg Glu Gly 255 260 265 gaa gct gcc gtg agg aac cag gga aag cct gag gag gat ttg cca acg 869 Glu Ala Ala Val Arg Asn Gln Gly Lys Pro Glu Glu Asp Leu Pro Thr 270 275 280 ggg cat cac tta acc cac ttc ctt ttt cgg gaa aag gtg tct gtc cag 917 Gly His His Leu Thr His Phe Leu Phe Arg Glu Lys Val Ser Val Gln 285 290 295 tcc ata gtg gga aat gtg aca gag cta cta ctg gct gga gtg gac acg 965 Ser Ile Val Gly Asn Val Thr Glu Leu Leu Leu Ala Gly Val Asp Thr 300 305 310 gta tcc aat acg ctc tcc tgg gca ctc tat gag ctc tcc cgg cac ccg 1013 Val Ser Asn Thr Leu Ser Trp Ala Leu Tyr Glu Leu Ser Arg His Pro 315 320 325 330 gaa gtc cag tct gca ctc cac tct gag atc aca ggc gct gtg aac cct 1061 Glu Val Gln Ser Ala Leu His Ser Glu Ile Thr Gly Ala Val Asn Pro 335 340 345 ggc tcc tat gcc cac ctc caa gcc act gct ctg tcc cag cta ccc ctg 1109 Gly Ser Tyr Ala His Leu Gln Ala Thr Ala Leu Ser Gln Leu Pro Leu 350 355 360 cta aag gct gtg atc aaa gaa gtg ttg aga ttg tac cct gtg gta cct 1157 Leu Lys Ala Val Ile Lys Glu Val Leu Arg Leu Tyr Pro Val Val Pro 365 370 375 ggg aac tcc cgt gtc cca gac aga gac atc tgt gta gga aac tat gtt 1205 Gly Asn Ser Arg Val Pro Asp Arg Asp Ile Cys Val Gly Asn Tyr Val 380 385 390 att ccc caa gat aca ctg gtt tcc ctc tgt cac tat gcc act tca agg 1253 Ile Pro Gln Asp Thr Leu Val Ser Leu Cys His Tyr Ala Thr Ser Arg 395 400 405 410 gac ccc gcc cag ttt cgg gaa ccc aac tct ttt aat cca gct cga tgg 1301 Asp Pro Ala Gln Phe Arg Glu Pro Asn Ser Phe Asn Pro Ala Arg Trp 415 420 425 ctt gga gag ggt cca gcc ccc cac cca ttt gca tct ctt cct ttt ggc 1349 Leu Gly Glu Gly Pro Ala Pro His Pro Phe Ala Ser Leu Pro Phe Gly 430 435 440 ttt ggc aaa cga agt tgc ata ggg aga cgc ttg gca gag ctc gag cta 1397 Phe Gly Lys Arg Ser Cys Ile Gly Arg Arg Leu Ala Glu Leu Glu Leu 445 450 455 caa atg gcg ttg gcc cag atc ttg acc cat ttt gag gtg ctg cct gag 1445 Gln Met Ala Leu Ala Gln Ile Leu Thr His Phe Glu Val Leu Pro Glu 460 465 470 cca ggt gct ctt cca gtc aaa ccc atg acc cgg act gtc ctg gta cct 1493 Pro Gly Ala Leu Pro Val Lys Pro Met Thr Arg Thr Val Leu Val Pro 475 480 485 490 gag agg agc atc cat ctc cag ttt gta gac aga tagtcctgtg gaaggcagct 1546 Glu Arg Ser Ile His Leu Gln Phe Val Asp Arg 495 500 gtcatcatct ctctccagac tggatttttc ttactatgca caagaggcac actctccctc 1606 gaggcctgtc tgtctgagca aacttcagga agcaggcccg ggcctatctg tgcttgacct 1666 gactcagcag gtaccacaga accaggatcc tttctcctgc tcagtacctc tcctgatcat 1726 tcctcaagat ccaaagcctt cagattttaa cacatcctta aagggccaac tcgggggtta 1786 actaacagcc ccaggcagcc tgggcaggga tcccccactg atccttccat gcttacagtg 1846 ttcactgaca gctgtctaag catccattgc agcacaaact aagtgactgt gcacctggtc 1906 tgcacctggt ctgcacctgg ttgcgtctct gcctgaccat gtgagctctt tgagaagagt 1966 gatgactact gggcttttag ctcttttcct ttttgggaca cagtcttgct attgtactcc 2026 atgctgtcct tgaacccaca agccctcacc tcaccttccc aagtgttggg ttacggacat 2086 tagctatggc ttccagcttt attagtcttt ctatctcctg ccatggtcta tccccggcta 2146 tttgatacta tatattctca gattgaatct ggaccatgtg gtagaaggga tgaccactca 2206 ccaggctcta cccaccactt tatcttaatc ttttctctag gaaagtgaat ctctccttgc 2266 cttacagcat tttaaagctc cccttggctg ttctgctctt tagccactct aaagtggatc 2326 cactctactt ctcaccaccc atctttctgc accccagcct gtctttttat atttaaaaaa 2386 ttgtatttat tatgttttca aataaaatgt ttactccttg aaaaaaaaaa aaaaaaaaaa 2446 aaaaaaaaaa aaaaaaaaaa aaa 2469 6 2469 DNA human CDS (122)..(1645) 6 aggagggatt ggctgaggag cttggagagg gggcgtcatc acctcaccca aaggttaaat 60 aggggttgag atatgatgct caggagaagc gctttctttc gcgagcaccc tgaaccagac 120 c atg acc cag acc ctc aag tac gcc tcc aga gtg ttc cat cgc gtc cgc 169 Met Thr Gln Thr Leu Lys Tyr Ala Ser Arg Val Phe His Arg Val Arg 1 5 10 15 tgg gcg ccc gag ttg ggc gcc tcc cta ggc tac cga gag tac cac tca 217 Trp Ala Pro Glu Leu Gly Ala Ser Leu Gly Tyr Arg Glu Tyr His Ser 20 25 30 gca cgc cgg agc ttg gca gac atc cca ggc ccc tct acg ccc agc ttt 265 Ala Arg Arg Ser Leu Ala Asp Ile Pro Gly Pro Ser Thr Pro Ser Phe 35 40 45 ctg gcc gaa ctt ttc tgc aag ggg ggg ctg tcg agg cta cac gag ctg 313 Leu Ala Glu Leu Phe Cys Lys Gly Gly Leu Ser Arg Leu His Glu Leu 50 55 60 cag gtg cag ggc gcc gcg cac ttc ggg ccg gtg tgg cta gcc agc ttt 361 Gln Val Gln Gly Ala Ala His Phe Gly Pro Val Trp Leu Ala Ser Phe 65 70 75 80 ggg aca gtg cgc acc gtg tac gtg gct gcc cct gca ctc gtc gag gag 409 Gly Thr Val Arg Thr Val Tyr Val Ala Ala Pro Ala Leu Val Glu Glu 85 90 95 ctg ctg cga cag gag gga ccc cgg ccc gag cgc tgc agc ttc tcg ccc 457 Leu Leu Arg Gln Glu Gly Pro Arg Pro Glu Arg Cys Ser Phe Ser Pro 100 105 110 tgg acg gag cac cgc cgc tgc cgc cag cgg gct tgc gga ctg ctc act 505 Trp Thr Glu His Arg Arg Cys Arg Gln Arg Ala Cys Gly Leu Leu Thr 115 120 125 gcg gaa ggc gaa gaa tgg caa agg ctc cgc agt ctc ctg gcc ccg ctc 553 Ala Glu Gly Glu Glu Trp Gln Arg Leu Arg Ser Leu Leu Ala Pro Leu 130 135 140 ctc ctc cgg cct caa gcg gcc gcc cgc tac gcc gga acc ctg aac aac 601 Leu Leu Arg Pro Gln Ala Ala Ala Arg Tyr Ala Gly Thr Leu Asn Asn 145 150 155 160 gta gtc tgc gac ctt gtg cgg cgt ctg agg cgc cag cgg gga cgt ggc 649 Val Val Cys Asp Leu Val Arg Arg Leu Arg Arg Gln Arg Gly Arg Gly 165 170 175 acg ggg ccg ccc gcc ctg gtt cgg gac gtg gcg ggg gaa ttt tac aag 697 Thr Gly Pro Pro Ala Leu Val Arg Asp Val Ala Gly Glu Phe Tyr Lys 180 185 190 ttc gga ctg gaa ggc atc gcc gcg gtt ctg ctc ggc tcg cgc ttg ggc 745 Phe Gly Leu Glu Gly Ile Ala Ala Val Leu Leu Gly Ser Arg Leu Gly 195 200 205 tgc ctg gag gct caa gtg cca ccc gac acg gag acc ttc atc cgc gct 793 Cys Leu Glu Ala Gln Val Pro Pro Asp Thr Glu Thr Phe Ile Arg Ala 210 215 220 gtg ggc tcg gtg ttt gtg tcc acg ctg ttg acc atg gcg atg ccc cac 841 Val Gly Ser Val Phe Val Ser Thr Leu Leu Thr Met Ala Met Pro His 225 230 235 240 tgg ctg cgc cac ctt gtg cct ggg ccc tgg ggc cgc ctc tgc cga gac 889 Trp Leu Arg His Leu Val Pro Gly Pro Trp Gly Arg Leu Cys Arg Asp 245 250 255 tgg gac cag atg ttt gca ttt gct cag agg cac gtg gag cgg cga gag 937 Trp Asp Gln Met Phe Ala Phe Ala Gln Arg His Val Glu Arg Arg Glu 260 265 270 gca gag gca gcc atg agg aac gga gga cag ccc gag aag gac ctg gag 985 Ala Glu Ala Ala Met Arg Asn Gly Gly Gln Pro Glu Lys Asp Leu Glu 275 280 285 tct ggg gcg cac ctg acc cac ttc ctg ttc cgg gaa gag ttg cct gcc 1033 Ser Gly Ala His Leu Thr His Phe Leu Phe Arg Glu Glu Leu Pro Ala 290 295 300 cag tcc atc ctg gga aat gtg aca gag ttg cta ttg gcg gga gtg gac 1081 Gln Ser Ile Leu Gly Asn Val Thr Glu Leu Leu Leu Ala Gly Val Asp 305 310 315 320 acg gtg tcc aac acg ctc tct tgg gct ctg tat gag ctc tcc cgg cac 1129 Thr Val Ser Asn Thr Leu Ser Trp Ala Leu Tyr Glu Leu Ser Arg His 325 330 335 ccc gaa gtc cag aca gca ctc cac tca gag atc aca gct gcc ctg agc 1177 Pro Glu Val Gln Thr Ala Leu His Ser Glu Ile Thr Ala Ala Leu Ser 340 345 350 cct ggc tcc agt gcc tac ccc tca gcc act gtt ctg tcc cag ctg ccc 1225 Pro Gly Ser Ser Ala Tyr Pro Ser Ala Thr Val Leu Ser Gln Leu Pro 355 360 365 ctg ctg aag gcg gtg gtc aag gaa gtg cta aga ctg tac cct gtg gta 1273 Leu Leu Lys Ala Val Val Lys Glu Val Leu Arg Leu Tyr Pro Val Val 370 375 380 cct gga aat tct cgt gtc cca gac aaa gac att cat gtg ggt gac tat 1321 Pro Gly Asn Ser Arg Val Pro Asp Lys Asp Ile His Val Gly Asp Tyr 385 390 395 400 att atc ccc aaa aat acg ctg gtc act ctg tgt cac tat gcc act tca 1369 Ile Ile Pro Lys Asn Thr Leu Val Thr Leu Cys His Tyr Ala Thr Ser 405 410 415 agg gac cct gcc cag ttc cca gag cca aat tct ttt cgt cca gct cgc 1417 Arg Asp Pro Ala Gln Phe Pro Glu Pro Asn Ser Phe Arg Pro Ala Arg 420 425 430 tgg ctg ggg gag ggt ccc acc ccc cac cca ttt gca tct ctt ccc ttt 1465 Trp Leu Gly Glu Gly Pro Thr Pro His Pro Phe Ala Ser Leu Pro Phe 435 440 445 ggc ttt ggc aag cgc agc tgt atg ggg aga cgc ctg gca gag ctt gaa 1513 Gly Phe Gly Lys Arg Ser Cys Met Gly Arg Arg Leu Ala Glu Leu Glu 450 455 460 ttg caa atg gct ttg gcc cag atc cta aca cat ttt gag gtg cag cct 1561 Leu Gln Met Ala Leu Ala Gln Ile Leu Thr His Phe Glu Val Gln Pro 465 470 475 480 gag cca ggt gcg gcc cca gtt aga ccc aag acc cgg act gtc ctg gta 1609 Glu Pro Gly Ala Ala Pro Val Arg Pro Lys Thr Arg Thr Val Leu Val 485 490 495 cct gaa agg agc atc aac cta cag ttt ttg gac aga tagtcccatg 1655 Pro Glu Arg Ser Ile Asn Leu Gln Phe Leu Asp Arg 500 505 gaaagagact gtcatcatca ccctttcatt catcataggg ataagatttt ttgtaggcac 1715 aagaccaagg tatacatctt cccctaatgc ctatctgacc aaactggata gaaccaccat 1775 agtgaagtgt gaggcggccc tgaccaatgt gtgaagtatg cacttggcct gactcaggaa 1835 gccaggtgag aaaaccatgg tctctctgct tgcttggccc ttctgatcat gtatgcatcc 1895 cccaaggatg aaatcagatt ttaactaata atgctggatg gcctgaggaa agattcaact 1955 gcctctcttt ttgggctttc atagtgttca ttgatgctgc tggctaagca tttatcaaag 2015 cataagctca gtaactgtgc atctggtctg tacctggttg gtccttcgtc tttgcatgta 2075 agctctttga gaggaagggt gaagccttat ttgtttttta tgtcccctgc cagggcctgt 2135 ctctgactag gtgtcaccat acacattctt agattgaatc tgaaccatgt ggcagaaggg 2195 ataagcagct tacttagtag gctctgtcta cccccttcct tctttgtctt gcccctagga 2255 aggtgaatct gccctagcct ggtttacggt ttcttataac tctcctttgc tctctggcca 2315 ctattaagtg ggtttgcccc atcacttagt tctcaggcag agacatcttt gggcctgtcc 2375 ctgcccaggc ctctggcttt ttatattgaa aatttttaaa tattcacaaa ttttagaata 2435 aatcaaatat tccattaaaa aaaaaaaaaa aaaa 2469 7 23 DNA synthetic DNA 7 ctsctsaarg chgtsatyaa rga 23 8 22 DNA synthetic DNA 8 ckcttbccra abccraargg va 22 9 25 DNA synthetic DNA 9 aaggcagtga ttaaggaagt gttga 25
Claims (11)
1. A polypeptide comprising an amino acid sequence selected from the amino acid sequences represented by SEQ ID NOS. 1 and 2, or
a polypeptide comprising an amino acid sequence in which amino acids residues are deleted, substituted or added in the amino acid sequence of said polypeptide, and having 25-hydroxyvitamin D3-1α-hydroxylase activity.
2. A DNA encoding a polypeptide according to claim 1 or
a DNA which hybridizes with said DNA under stringent conditions.
3. The DNA according to claim 2 , wherein the DNA is DNA comprising a nucleotide sequence selected from nucleotide sequences represented by SEQ ID NOS. 3 and 4.
4. A recombinant DNA prepared by inserting the DNA according to claim 2 or 3 into a vector.
5. A transformant carrying a recombinant DNA according to claim 4 .
6. A method for producing 25-hydroxyvitamin D3-1α-hydroxylase, comprising:
cultivating the transformant according to claim 5 in a medium to produce 25-hydroxyvitamin D3- 1α-hydroxylase in the culture; and
recovering said 25-hydroxyvitamin D3-1α-hydroxylase from the resulting culture.
7. A method for producing 1α, 25-dihydroxyvitamin D3, comprising:
putting the polypeptide according to claim 1 and 25-hydroxyvitamin D3 in an aqueous medium to produce 1α, 25-dihydroxyvitamin D3 in the aqueous medium; and
recovering said 1α, 25-dihydroxyvitamin D3 from the aqueous medium.
8. An antibody recognizing the polypeptide according to claim 1 .
9. A method for immunologically detecting a polypeptide having 25-hydroxyvitamin D3-1α-hydroxylase activity, using the antibody according to claim 8 .
10. An immuno-histological staining method comprising using an antibody according to claim 8 .
11. An immuno-histological staining agent containing an antibody according to claim 8.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/878,262 US20020031798A1 (en) | 1997-07-10 | 2001-06-12 | Antibody recognizing human 25-hydroxyvitamin D3-1a-hydroxylase |
Applications Claiming Priority (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP18539997 | 1997-07-10 | ||
JP185399/97 | 1997-07-10 | ||
JP9322651A JPH1175863A (en) | 1997-07-10 | 1997-11-25 | 25-hydroxyvitamin d3-1-alpha-hydroxylase and dna encoding the same |
JP322651/97 | 1997-11-25 | ||
US09/111,730 US6274359B1 (en) | 1997-07-10 | 1998-07-08 | 25-hydroxyvitamin D3-1α-hydroxylase and DNA encoding the hydroxylase |
US09/878,262 US20020031798A1 (en) | 1997-07-10 | 2001-06-12 | Antibody recognizing human 25-hydroxyvitamin D3-1a-hydroxylase |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/111,730 Division US6274359B1 (en) | 1997-07-10 | 1998-07-08 | 25-hydroxyvitamin D3-1α-hydroxylase and DNA encoding the hydroxylase |
Publications (1)
Publication Number | Publication Date |
---|---|
US20020031798A1 true US20020031798A1 (en) | 2002-03-14 |
Family
ID=26503073
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/111,730 Expired - Fee Related US6274359B1 (en) | 1997-07-10 | 1998-07-08 | 25-hydroxyvitamin D3-1α-hydroxylase and DNA encoding the hydroxylase |
US09/878,262 Abandoned US20020031798A1 (en) | 1997-07-10 | 2001-06-12 | Antibody recognizing human 25-hydroxyvitamin D3-1a-hydroxylase |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US09/111,730 Expired - Fee Related US6274359B1 (en) | 1997-07-10 | 1998-07-08 | 25-hydroxyvitamin D3-1α-hydroxylase and DNA encoding the hydroxylase |
Country Status (4)
Country | Link |
---|---|
US (2) | US6274359B1 (en) |
EP (2) | EP0890643A3 (en) |
JP (1) | JPH1175863A (en) |
CA (1) | CA2237138A1 (en) |
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US20050208669A1 (en) * | 2002-07-29 | 2005-09-22 | Tohoku Techno Arch Co., Ltd. | Method and apparatus for measuring trace ingredients in water |
US9408858B2 (en) | 2007-04-25 | 2016-08-09 | Opko Renal, Llc | Method for treating secondary hyperparathyroidism in CKD |
US9861644B2 (en) | 2013-03-15 | 2018-01-09 | Opko Ireland Global Holdings, Ltd. | Stabilized modified release vitamin D formulation and method of administering same |
US9943530B2 (en) | 2006-02-03 | 2018-04-17 | Opko Renal, Llc | Treating vitamin D insufficiency and deficiency with 25-hydroxyvitamin D2 and 25-hydroxyvitamin D3 |
US10220047B2 (en) | 2014-08-07 | 2019-03-05 | Opko Ireland Global Holdings, Ltd. | Adjunctive therapy with 25-hydroxyvitamin D and articles therefor |
US10302660B2 (en) | 2008-04-02 | 2019-05-28 | Opko Renal, Llc | Methods useful for vitamin D deficiency and related disorders |
US10668089B2 (en) | 2006-06-21 | 2020-06-02 | Opko Ireland Global Holdings, Ltd. | Method of treating and preventing secondary hyperparathyroidism |
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US4554106A (en) | 1984-11-01 | 1985-11-19 | Wisconsin Alumni Research Foundation | Method for preparing 1α-hydroxyvitamin D compounds |
JP3024154B2 (en) * | 1990-02-06 | 2000-03-21 | 住友化学工業株式会社 | Cytochrome P450c Bottom 2 Bottom 5 Gene |
DE69122016T2 (en) | 1990-09-26 | 1997-04-30 | Sumitomo Chemical Co | Mitochondrial P450 |
US5786191A (en) * | 1992-04-09 | 1998-07-28 | Goldstein; Joyce A. | Cloning and expression of complementary DNAs for multiple members of the human cytochrome P450 2C subfamily |
US5981176A (en) * | 1992-06-17 | 1999-11-09 | City Of Hope | Method of detecting and discriminating between nucleic acid sequences |
AU673187B2 (en) * | 1992-07-31 | 1996-10-31 | Garvan Institute Of Medical Research | Assessment of trans-acting factors allelic variation |
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US6096876A (en) * | 1997-08-06 | 2000-08-01 | Shriners Hospitals For Children | 1-α-hydroxylase materials and methods |
CA2323782A1 (en) | 1998-03-25 | 1999-09-30 | Cutanogen, Inc. | Methods for prevention and treatment of cancer |
-
1997
- 1997-11-25 JP JP9322651A patent/JPH1175863A/en active Pending
-
1998
- 1998-07-08 US US09/111,730 patent/US6274359B1/en not_active Expired - Fee Related
- 1998-07-09 CA CA002237138A patent/CA2237138A1/en not_active Abandoned
- 1998-07-10 EP EP98112865A patent/EP0890643A3/en not_active Withdrawn
- 1998-07-10 EP EP00124552A patent/EP1074627A3/en not_active Withdrawn
-
2001
- 2001-06-12 US US09/878,262 patent/US20020031798A1/en not_active Abandoned
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Also Published As
Publication number | Publication date |
---|---|
CA2237138A1 (en) | 1999-01-10 |
EP0890643A2 (en) | 1999-01-13 |
EP1074627A2 (en) | 2001-02-07 |
EP0890643A3 (en) | 1999-04-28 |
JPH1175863A (en) | 1999-03-23 |
EP1074627A3 (en) | 2001-04-04 |
US6274359B1 (en) | 2001-08-14 |
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