WO2003106677A1 - ホッコクアカエビ由来の新規なカテプシンl様システインプロテアーゼ - Google Patents
ホッコクアカエビ由来の新規なカテプシンl様システインプロテアーゼ Download PDFInfo
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- WO2003106677A1 WO2003106677A1 PCT/JP2003/007661 JP0307661W WO03106677A1 WO 2003106677 A1 WO2003106677 A1 WO 2003106677A1 JP 0307661 W JP0307661 W JP 0307661W WO 03106677 A1 WO03106677 A1 WO 03106677A1
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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
- C12N9/14—Hydrolases (3)
- C12N9/48—Hydrolases (3) acting on peptide bonds (3.4)
- C12N9/50—Proteinases, e.g. Endopeptidases (3.4.21-3.4.25)
- C12N9/64—Proteinases, e.g. Endopeptidases (3.4.21-3.4.25) derived from animal tissue
- C12N9/6402—Proteinases, e.g. Endopeptidases (3.4.21-3.4.25) derived from animal tissue from non-mammals
- C12N9/6405—Proteinases, e.g. Endopeptidases (3.4.21-3.4.25) derived from animal tissue from non-mammals not being snakes
- C12N9/641—Cysteine endopeptidases (3.4.22)
Definitions
- the present invention relates to a novel cathepsin L-like enzyme extracted from P. cruzi, a method of purifying the same, a polynucleotide encoding a novel protease, catebucin L-like cysteine protease enzyme, newly identified from P. cruzi, and a polynucleotide encoded thereby.
- Peptides the use of such polynucleotides and polypeptides.
- Protease is a general term for enzymes that hydrolyze peptide bonds in proteins. It is widely distributed in microorganisms, plants and animals, and many proteases with different catalytic groups and substrate specificities have been isolated. It has a wide range of applications, for example, it is used for food modifiers, detergents, cosmetic raw materials, beer clarification agents, leather tanning agents, and pharmaceuticals.
- Proteases are one of the most important groups of enzymes that hydrolyze peptide bonds in proteins, are widely distributed in microorganisms, plants and animals, and are involved in a wide variety of biological processes.
- proteases are classified into four families based on catalytic groups: aspartic acid mono-, cysteine mono-, serine mono-, and metallo-lipase. The molecular mechanisms of action of these enzymes have been extensively studied.
- SH protease cyste protease having an SH group at its active center includes enzymes such as promelain.
- Cathepsins which belong to the papains superfamily of cysteine proteases, are divided into the cathepsin L subfamily and the force-tepsin B subfamily. Cathepsin L subfamily
- the former ER (F / W) NIN motif is absent in cathepsin B family and cathepsin C, 0, and X.
- Cathepsin L is present in lysosomes in mammals and has strong endoprotease activity, but has no exotype activity. To date, cathepsin L and cathepsin L-like cysteine protease have been identified and sequenced from several animals. These are listed below.
- Nephrops norvegicus (Norway lobster) Le Boulay C., Van Wormhoudt A., Sellos D. Molecular cloning and sequencing of two cDNAs encoding cathepsin related cysteine proteinases in the nervous system and in the stomach of the Norway lobster (Nephrops norvegicus) .Comp.Biochem.Physiol. 111: 353-359 (1995).
- Rattus norvegicus (Norway rat)
- Cathepsin L shown above has an optimal pH under acidic conditions and an optimal temperature of 50-70 ° C.
- the cloning of the gene alone has not identified the enzyme and has not been characterized.
- cathepsin L which retains high activity even at low temperatures under neutral to alkaline conditions, is not known to date. If cathepsin L can be found to maintain high activity even at low temperatures under neutral to alkaline conditions, it will be possible to avoid the deterioration of properties due to protein denaturation and to modify the properties of protein materials. It is possible to provide a very useful enzyme when it is applied to modifiers, detergents, cosmetic raw materials, and pharmaceuticals.
- the present inventors sought naturally a protease capable of degrading collagen even in a low-temperature region, and as a result of intensive screening, by chance, Japanese pink By using prawns, we succeeded in finding a new protease in the liver that retains activity even in the low-temperature region.
- This protease is a cathepsin L-like cysteine protease.
- Red-necked shrimp are cold-adapted species distributed in the North Pacific Ocean and the North Atlantic Ocean, usually in a low temperature environment of -1.6 to 5 ° C.
- Some cold-adapted enzymes have been reported to exhibit substantially higher catalytic efficiencies than their mammalian counterparts. For example, it has been reported that, for trypsin, a serine protease that is particularly well studied among proteases, salmon trypsin has a 40-fold higher catalytic efficiency than dicitribins.
- the present inventors at the time of screening, removed liver liver from unfrozen raw pink squash to prevent the cells of liver liver from being destroyed by freezing, and the enzyme in liver liver cells was degraded. We devised it so that it can be extracted without receiving it. Furthermore, the present inventors have found a method for purifying the cathepsin L-like cysteine protease of the present invention from the rapidly frozen liver and knee.
- This cathepsin L-like protein can be purified from pink squash by appropriately combining ion exchange column, gel filtration column, adsorption column, salting out, dialysis, ultrafiltration, centrifugation and the like.
- liver liver is isolated from raw pink squash, homogenized, defatted, proteins are precipitated with ammonium sulfate, redissolved, the supernatant is purified by anion exchange column, separated by adsorption chromatography, and It can be purified and prepared by ion exchange chromatography.
- anion-exchange chromatography for example, Q Sepharose and Mono Q can be used, and as the adsorption chromatography, for example, hydroxyapatite can be used.
- anion exchange chromatography examples include Q Sepharose and Mono Q
- examples of gel filtration chromatography include Superdex
- examples of adsorption chromatography include hydroxypatite.
- the thus purified pink quake shrimp cathepsin L-like cysteine protease has (1) a molecular weight of about 3 OKDa, (2) an optimum pH of about 7 to 8, and (3) an optimum temperature of about 35 ° C.
- the expressed isoform of P. aeruginosa cathepsin L-like cysteine protease has (1) a molecular weight of about 30 KDa, (2) an optimal PH of about 6-8, and (3) an optimal temperature of about 40 ° C ( (It was active even at 20 ° C)), (4) it showed collagen degradability, and (5) it showed cathepsin L-like activity.
- pink quack shrimp cathepsin L1 and pink quack shrimp cathepsin L2 were named pink quack shrimp cathepsin L1 and pink quack shrimp cathepsin L2, respectively.
- pink quake shrimp cathepsin L1 may be referred to as NSL1 or NsCtL
- pink quack shrimp cathepsin L2 may be referred to as NSL2
- pink quack shrimp cystine protease, NsCys, or Crustapain pink quack shrimp cystine protease, NsCys, or Crustapain.
- the gene coding for P. catechusin L1 and L2 is recombined into an appropriate expression vector, and the recombinant expression vector is introduced into a suitable host.
- a suitable host Can be produced.
- various well-known vectors can be used.For example, when the host is E. coli, a series of pUR vectors, pATH vectors, pGEX vectors, etc. When animal cells are used as hosts, vectors such as pXM and pDC201 can be used.
- the gene of the present invention is inserted into expression vectors pGEX (Amersham Pharmacia), pET39b (Novagen), and pRSET (Invitorgen), and introduced into Escherichia coli. Expression could be induced.
- SDS-PAGE SDS-PAGE, It was confirmed that a gene having a target molecular weight was expressed.
- the yeast expression vector p PICZ into which the present gene has been introduced is introduced into the host yeast strain P. pastoris X-33 or KM71H by electroporation to obtain a high-concentration (2000 M g / ml) of a zeocin-containing medium.
- a band having a size corresponding to the target enzyme was detected.
- the present invention encompasses the two isolated cathepsin L-like proteases and naturally occurring variants thereof. Further, the present invention relates to a protein comprising an amino acid sequence in which one or several amino acids are deleted, substituted or added in the amino acid sequence of L. or L. cathepsin L1 or L2, and having a cathepsin L-like enzyme activity. Include. The present invention also includes prepro-forms of these cathepsin L-like enzymes. Also included are polypeptides that are 80% or more identical to all or part of the amino acid sequence of these cathepsins L1 or L2. Further, the present invention also includes signal peptides and propeptides of these cathepsin L-like enzymes. These propeptides are also useful as inhibitors of the present cathepsin-like enzyme. The present invention also includes DNAs encoding these enzymes, their signal peptides, and propeptides.
- the present invention provides a method for hybridizing with the DNA comprising the complementary strand of the above-mentioned squamous lobster 'cathepsin L1, the squamous lobster .cathepsin L2, or the respective prepro-compounds under stringent engineering conditions, and a cathepsin L-like Includes DNA encoding a protein having enzymatic activity.
- the stringent conditions are, for example, a condition in which the DNA is bound by treating at 120 ° C for 20 minutes with Hybond N + Nia membrane (Amersham Pharmacia) in a church phosphate buffer solution (0.5M Na 2 HPO 1 mM EDTA, 7%
- the creation of the probe for example, a cDNA fragment was amplified by P CR, using a Takara randara primer DNA labeling kit Ver.2 ( Takara), [a u2 P] - performs labeling of the probe by d CTP. Then, remove the unreacted isotope using a centrifugal filter (Millipore).
- the present invention provides an amino acid sequence in which one or several amino acids have been deleted, substituted or added to the amino acid sequence of the pink prawn 'Catebsin L 1, Pink prawn' Catebsin L 1, or its prepro-form, and A DNA encoding a protein having a cathepsin L-like enzyme activity, or a DNA encoding a prepro-form of a protein having a cathepsin L-like enzyme activity is also included.
- the present invention relates to the present invention comprising 1 to 100, preferably 1 to 10, and more preferably 1 to 100, preferably 1 to 100, DNAs encoding the pink quake shrimp cathepsin L 1, the pink quake shrimp force tepsin L 2, and its prepro-form.
- DNAs encoding the pink quake shrimp cathepsin L 1, the pink quake shrimp force tepsin L 2, and its prepro-form One to several bases are deleted, substituted or added DNAs, including DNAs encoding proteins having the activity of L. or L2.
- polypeptide-producing ability that is 80% or more, preferably 90% or more, particularly preferably 95% or more identical to the whole or part of the amino acid sequence of L. or cathepsin L1 or L2.
- DNA has a cathepsin L-like enzyme activity having a homology of 80% or more, preferably 90% or more, and particularly preferably 95% or more with respect to the DNA sequence encoding these cathepsin L or preprocatecatin L.
- DNAs encoding proteins or proteins that function as prebub cathepsin L-like enzymes are included.
- the present invention provides primers for detecting these genes, for example, a sequence of 15 or more bases in 1 or 2 base sequences or one or several deletions, substitutions, or additions to the sequences. Includes base sequence.
- the amino acid sequence of L. or L. 2 comprises one or more amino acids deleted, substituted or added in the amino acid sequence of L. or L.2, and L. or L.2 for L. or L.
- 6 7 and 6 8 are Val
- 13 3 are Cys
- 1 5 7 force S Ile 1 6 0 is Ala
- 2 5 5 is Gin
- 6 7 is Trp
- 68 Pro
- 133 Cys
- 157 is Ala
- 160 Ala
- 205 is Tyr. I do.
- FIG. 1 shows the nucleotide sequence and amino acid sequence of P. catecabin L1.
- FIG. 2 shows the nucleotide sequence and amino acid sequence of P. catecabin L2.
- FIG. 3 shows the SDS-PAGE of P. catebucin L1.
- Lanel Molecular weight marker
- Lane2 Pink squab.
- Figure 4 shows the degradation pattern of collagen by Pink squab 'Cathepsin L1.
- Lanel Molecular weight marker
- Lane2 Collagen
- Lane3 0 hour reaction
- Lane4 25 ° C, 30 Minute reaction
- FIG. 5 is a graph showing the optimum pH of the stag beetle catechusin L1.
- FIG. 6 is a graph showing the optimum temperature of the stag beetle catebucin L1.
- FIG. 7 is a diagram showing the temperature stability of Pseudomonas catechusin L1.
- Figure 8 shows the amino acid sequences of L. and L2 07661 Sequence comparison with shellfish cathepsin L, rat cathepsin L and papain
- Position numbers are based on papain position numbers, identical residues are indicated by dots, and gaps are added to maximize matching.
- the cysteines that form the three S—S bonds are gray, and the active centers Cys and His Asp are outlined.
- the brown squid 'cathepsin L 1 and L 2 correspond to Northern Shrimp 1 and 2, respectively.
- Figure 9 shows (A) phylogenetic tree of cathepsins belonging to papain superfamily and (B) homology between amino acid sequences.
- the phylogenetic tree was created by the neighbor-joining method based on the parallel alignment of the mature enzyme sequences. The sequences that appear in FIG. 8 are in bold. The number beside the branch indicates the bootstrap value (%).
- Pink cat shrimp cathepsin L-like cysteine proteases L1 and L2 are papain, rat tepsins B, H, K, S, and L (RCB, RCH, RCB, respectively).
- RCK, RCL and RCL American Mouth Buster ⁇ Homarus amen'c cysteine proteases 1, 2, and 3 (abbreviated as LCP1, LCP2, and LCP3, respectively), and No.
- NCP 1 and NCP 2 Nervous system and gastric cathepsin L
- CPe prawn-related species
- PCP 1 and PCP 2 Cathepsin L 1 and L 2
- Figure 10 shows PAS (periodic acid Schiff) staining of pink squid 'cathepsin L1 in acrylamide.
- Lane 1 shows the protein-containing protein, L. catechusin L2 (NsCys), and lane 2 shows the mature protein, L. catechusin L2 (NsCys).
- Fig. 13 (Reference 1 Fig. 6) pH profile and pH stability of the activity of cat bacterium L2
- Fig. 15 Substrate specificity of L. catechusin L2
- FR in Fig. 15 is Z-Phe-Arg-MCA
- RR is Z-Arg-Arg-MCA
- PR is Z-Pro-Arg-MCA
- VVR is Z-Val-Val-Arg-MCA
- LLR stands for Z-Leu-Leu-Arg-MCA, respectively.
- Figure 17 SDS-PAGE showing the results of degradation of type I collagen by Aspergillus catechusin L2 The best mode for carrying out the invention
- a live pink squid was purchased from the fishermen's cooperative and dissected to collect liver and liver. To this liver-knee, 2 times the volume of 50 mM Tris-HCl (pH 7.5) was added and homogenized. Next, 1/5 volume of tetrachloromethane was added, and the mixture was stirred at 4 ° C for 1 hour to degrease, and then centrifuged (18,000 g, 4 ° C, 30 minutes) to obtain The supernatant was subjected to ammonium sulfate fractionation. 1 7.6-4 7.2% The (wZ V) ammonium sulfate, 5 mM CaCl 2, 20mM containing 0. 02% NaN 3 Tris- HC1 ( pH7. 5)
- Buffer A dialyzed, and then subjected to Q Sepharose column (Amersham Pharmacia) equilibrated with Buffer A. After the non-adsorbed fraction was washed with Buffer A, it was eluted with a linear gradient between Buffer A and Buffer A containing 0.6 M NaCl.
- the active fraction was collected, dialyzed against 10 mM potassium phosphate buffer ( ⁇ 6.9), and added to a hydroxyapatite (Bio-Rad) column equilibrated with the same buffer. Elution was performed with a linear gradient with mM potassium phosphate buffer (pH 6.9). Further, the active fraction was applied to a MonoQ column. Elution was performed with a linear gradient between Buffer A and Buffer A containing 1 M NaCl. By the above-mentioned method, red lipstick L1 was purified. Tables 1 and 2 show the specific activity of each purification step measured using the synthetic substrate.
- the collagen-degrading activity of the fractions at each purification step and the purified enzyme was confirmed by SDS-PAGE after reacting with acid-soluble type I collagen (Wako Pure Chemical Industries) as a substrate at pH 7.5 and 25 ° C for 30 minutes. . ( Figure 4) 1
- the enzymatic activity during the purification process was quantitatively monitored by a method using the following synthetic substrate.
- DNP-Pro-Gln-Gly-Ile-Ala-Gly-Gly-Gln-D-Arg (hereinafter referred to as DNP-peptide) (Peptide Research Institute) was used. DNP-peptide was dissolved at a concentration of 1 mM in a 50 mM Tris_HCl buffer (pH 7.5) containing 150 mM NaCl to obtain a substrate solution. An equal volume of the enzyme solution of each fraction was added to 100 ml of the substrate solution, and reacted at 25 ° C for 10 minutes.
- the reaction was stopped by adding 0.5 ml of 1N HC1, a mixed solution of ethyl acetate and n-butanol (1: 0.15) was added, and the mixture was shaken vigorously. Then, after centrifugation, the absorbance of the supernatant was measured at 365 nm. The amount of enzyme used to hydrolyze 1 ⁇ of substrate per minute was defined as 1 unit.
- Bz-DL-Arg-pNA BAPA
- Sue- (Ala) 3-pNA STANA
- Suc-Ala -Ala-Pro-Arg-pNA APR
- Sue-Ala-Ala-Pro-Le-pNA AAPL
- BACHEM B z is Benzoyl
- p NA is p-Nitroanilide
- S uc stands for Succinyl, respectively.
- AAPL and AAPR are substrates on which force-derived serine collagenase acts.
- a substrate solution was prepared using dimethylsulfoxide at a concentration of 50 mM.
- the reaction was carried out at 5 ° C for 5 minutes, and the released p-nitroaline was colorimetrically determined at 405 nm.
- the amount of enzyme used to hydrolyze 1 ⁇ mol of substrate per minute was defined as 1 unit.
- the activity was measured using Z-Phe-Arg-MCA as a substrate.
- a substrate solution was prepared at a concentration of 2 OmM using dimethyl sulfoxide. Pre-incubate the enzyme solution in 50 mM Tris-HC1 buffer (pH 7.5) containing 50 mM NaC1, add the substrate solution to a final concentration of 50 / M, and add 25 ° C. After reacting for 5 minutes at C, the released 7-amine 4-methylcoumarin (AMC) was measured for fluorescence intensity at an excitation wavelength of 380 nm and a fluorescence wavelength of 460 ⁇ m. A standard curve was prepared and quantified using AMC (Peptide Research Institute), and the amount of enzyme used to hydrolyze 1 / zmo1 substrate per minute was 1 U. At the final stage of purification, 10.2 UZmg of activity was observed.
- FIG. 4 shows the degradation pattern of collagen by the pink squid 'cathepsin L1. As shown in the figure, the enzyme well degraded collagen by a reaction at 25 ° C for 30 minutes.
- FIG. 3 shows the SDS-PAGE pattern of 1 s. A single band around 30 kDa was obtained.
- PAS staining was performed as follows.
- the activity was measured at 25 ° C. in a Britton-Robinson buffer (pH 4-13) using DNP-peptide.
- the final reaction solution was 200 ⁇ l, the final concentration of DNP-peptide was 0.5 mM, and the final concentration of the enzyme was 1.5 gZm1.
- the optimum pH of this enzyme was about 7-8 (Fig. 5).
- This enzyme (300 ng) was added to 50 mM Tris-HCl buffer (pH 7.5) containing 150 mM NaCl, incubated at each temperature (20 ° C to 70 ° C) for 30 minutes and 60 minutes, and immediately cooled with water. . The residual activity was measured at 25 ° C. using DNP-peptide as a substrate.
- the final reaction solution was 200 ⁇ l, the final concentration of DNP-peptide was 0.5 mM, and the final concentration of the enzyme was
- the enzyme was stable at 25 ° C, 1 hour and 30 ° C for 30 minutes, and was inactivated at 50 ° C, 1 hour and 60 ° (30 minutes ( Figure 7).
- Oligonucleotides were prepared with reference to DWRDKGA which is a part of the determined N-terminal amino acid sequence.
- the prepared primer is 5'-GAY TGG CGN GAY AAR GGN GC- 3 '
- the determined base sequence and deduced amino acid sequence of L. and L2 are shown in Figure 1 (SEQ ID NOS: 1 and 2) and Figure 1, respectively. 2 (SEQ ID NOS: 3 and 4).
- Excluding the putative signal sequence (residues 1 to 15: Met to Ala) and prosequence (16 to 105: Ser to Ala) of the putative Lactobacillus cathepsin L1 the N-terminal part is the N-terminal of the purified enzyme It was completely identical to the amino acid sequence.
- catechusin L1 are nucleotides 29 to 73 in SEQ ID NO: 1, and the nucleotides encoding the pro sequence are nucleotides in SEQ ID NO: 1 and nucleotide 74 in FIG. 3 4 3 bases.
- the putative signal sequence of cathepsin L2 is Met to Val of 1 to 14 residues, the pro sequence is Ser to Met of 15 to 106 residues, and the bases encoding each are: It is the 1st to 54th bases and the 55th to 330th bases of SEQ ID NO: 3.
- Table 5 shows the homology of the amino acid sequences of Procathepsin L1 and L2 and Procatebcin L of other organisms.
- the crude extract was fractionated with 25-70% (v / v) cold acetone, 19,00 Ox Centrifuged at g for 15 minutes.
- the obtained precipitate was redissolved in 50 mM Tris-HC1 ( ⁇ 7.5, containing 50 mM NaCl) (buffer 1) and dialyzed against the same buffer 1 for 1 ⁇ .
- the dialyzed solution was filtered through a 0.45 ⁇ m filter, and then applied to a Q Separose ion exchange column (1.6 ⁇ 40 cm Amersham Pharmacia Biotech) equilibrated with the same buffer solution 1. After washing the column with the same buffer, the bound protein was
- Elution was with a linear gradient of NaCl in the M range.
- proteolytic activity was measured using Z-Phe-Arg-MCA, Z-Arg-Arg-MCA, and gelatin zymography.
- the solution was added to a Superdex75pg gel filtration column (1.6 ⁇ 100 cm Amersham Pharmacia Biotech), and the column was eluted at a flow rate of 0.4 ml / min.
- Enzyme activity was measured at 25 ° C using an MCA (methylcoumalyl amide) substrate whose fluorescence was lost in the molecule at 100 mM sodium acetate, pH 6.0, 100 mM NaCl, 2 mM DTT, 2 mM EDTA and The test was performed in 0.01% Brij-35 gently diluted solution. Substrate solutions were prepared at a concentration of 20 raM in dimethyl sulfoxide. The hydrolysis reaction is started by adding an enzyme diluted in the same buffer, and the enzyme activity is determined by exposing the released 7-amino-4-methylcoumarin (AMC) to an excitation wavelength of 380 nm and an emission wavelength of 460 nm. The fluorescence intensity was measured at 0 nm. ⁇ Assay for substrate specificity>
- pseudo-first-order conditions refer to conditions that use substrate concentrations much lower than the estimated m value, where the initial velocity V is directly proportional to c K m .
- the following fluorescent peptide substrates were used as substrates.
- pink 'akaebi catebucin L 1 is located at position P 2 (Schechter and d Berger. 1967 On the size of the active site in proteinases, I. Papain. Biochem. Biophys. Res.Commun. 27, 157-162) shows that it can cleave with high specificity a synthetic substrate having a non-aromatic attribute hydrophobic residue.
- This specificity pattern is similar to cathepsins K and S, both of which are more specific to Leu than Phe at this position.
- Cathepsin L has the opposite order of specificity.
- the enzyme solution is E64 (L-trans-epoxysuccinyl-leucyl-agmatine) Z-Phe-Phe-CHN 2 , and Z-Phe-Tyr (t-Bu) -CHN 2 , leupeptin ⁇ antipain, PMSF (phenylmethylsulfonyl fluoride) , And 1,10-phenanthroline inhibitor and a buffer (containing 1 OOmM sodium acetate, 2mM DTT, 2mM EDTA, and 0.05% Triton X-100) in a buffer solution Residual enzyme activity was measured by Z-Phe-Arg-MCA. The final concentrations of enzyme and substrate were InM and ⁇ , respectively, and the residual enzyme activity was measured as described above.
- Pink squid 'Catebcin L1 shows a typical cystin protease inhibition profile. Pink scabine cathepsin L1 is strongly inhibited by the cysteine protease inhibitor E64 even at a concentration of 0.1 tM. L1 binds to both cysteine and serine proteases It is also strongly inhibited by leupeptin and ant ipain.
- Z-Phe-Phe-CHN 2 is an effective inhibitor of cathepsin L, but not cathepsin B or
- Z - Phe - Tyr (t - Bu) - CHN 2 is a specific inhibitor to the force cathepsin L.
- this pink 'akaebi catebucin L1 is a completely new enzyme, differing in both the specificity and the inhibition by the inhibitor from the conventionally known cathepsin L-like protease. it can.
- Pink prawn a 92-base cDNA encoding the full-length precursor, excluding the cathepsin L2 (NsCys) signal peptide, was amplified by PCR, and the pUniD / V5- It was subcloned into the His-TOP0 vector.
- the resulting vector is a PPICA pastoris shuttle vector, pPICZ ⁇ , so that the cDNA of P. catechusin L2 (NsCys) is located downstream of the yeast ⁇ -mating factor secretion signal. -Recombined in Plasmid fusion via Cre recombinase.
- the P. pastoris KM71H strain (arg4 aoxl :: ARG4) was transformed by the electroporation method (GenePulser Biorad). Positive transformants in which multiple copies of cat bacterium 'cathepsin L 2 (NsCys) were incorporated were prepared at a concentration of 200 g of zeocin in a medium (YPDS) containing yeast extract, peptone extract and sorbitol.
- Pichia nostrils (P. pastoris) clones were inoculated into 1 liter of GCM (glycerol complex medium) prior to induction of expression and pre-cultured at 30 ° C under aeration conditions for 4 days.
- the cells were collected by centrifugation at 3000 Xg for 5 minutes at room temperature, and the expression was induced in 100 ml of BMM (buffered Minimal Methanol medium) or MM (Minimal Methanol medium) medium. Methanol was added daily to a final concentration of 0.75% to compensate for evaporation loss from the medium.
- BMM buffere.glycerol complex medium
- Methanol was added daily to a final concentration of 0.75% to compensate for evaporation loss from the medium.
- samples were taken daily and centrifuged at 12,000 xg for 20 minutes at 4 ° C, and the supernatant was subjected to SDS-PAGE using a polyacrylamide slab gel with a gradient of 420%. Was done.
- the supernatant from the cell-free medium was concentrated to about 10 ml at 4 ° C by ultrafiltration using a YM-10 membrane (Amicon).
- the concentrate was dialyzed against 50 mM Tri-HCl (containing 150 mM NaCl).
- the dialyzed material was subjected to gel filtration chromatography using a Superdex75pg column (1.6 x 100 cm) equilibrated with the same buffer, and the protein was eluted using an FPLC system at a flow rate of 0.3 ml / min. Was.
- enzyme activity was measured using Z-Phe-Arg-MCA, and the fraction showing the highest activity was further analyzed by SDS-PAGE and zymography to confirm the uniformity of the purity. .
- Gelatin zymography was used with a slight modification of the method of Heussen and Dowdle et al.
- Electrophoresis was performed at 4 ° C, containing 0.1% gelatin at 15 ° /. Performed on polyacrylamide slab gel. After electrophoresis, SDS was removed by washing twice in 2.5% Triton-X for 30 minutes. Gel 3 hours the enzyme reaction solution at room temperature (100mM sodium acetate, pH5. 5,100mM NaCl s 2mM DTT , 2mM EDTA ⁇ Pi 0. 01% Bri j) were incubated in coma Sheep Brilliant Blue R 2 5 0 And destained with 10% acetic acid. The results are shown in FIG. 12 (Reference 1, FIG. 5).
- the concentration of the purified recombinant pink squab 'cathepsin L 2 was determined by the method of Bradford using bovine serum albumin as a standard.
- the molar amount of the enzyme was determined by titrating the active site with E-64 by the method of Barrett and Kirschke.
- the pH activity profile of the recombinant P. catechusin L2 was measured at a 10 M substrate concentration under the pseudo-primary conditions described above.
- the following buffers were used: LOOmM sodium citrate buffer for PH3.0-6.0, lOOmM sodium phosphate buffer for pH 6.0-8.0, and lOOmM sodium phosphate buffer for pH 8.0-11.0. Each pH buffer further contains 2 mM DTT, 2 mM EDTA, and 300 mM NaCl.
- Enzymes were incubated in these buffers at 25 ° C for 30 minutes to determine pH stability. Residual activity was measured using the fluorescent substrates described above.
- cathepsins L and S prefer more substrates with Phe and Leu, which have a larger side chain at the P2 site that is more hydrophobic than the small] 3 branch Val.
- Val and Leu are reversed for pink squid.
- Cathepsin L 2 NsCys.
- Mammalian cathepsin K also prefers Pro at P2, but differs in that it also accepts Leu as a P2 residue and has considerable affinity for Phe. Disassembly of glucagon>
- ⁇ of glucagon sample is 12.5 ⁇ in 100 mM NaCl, 2mMDTT, and lOOmM sodium acetate buffer ( ⁇ 6.0) containing 0.01% Brij-35. ) At 25 ° C for 4 hours. The sample was then acidified with 15% acetic acid, and the resulting peptide fragments were immediately separated on a reverse-phase HPLC (0 DS-120A column (25 ⁇ 0.4 cm toso)).
- the column is washed with water containing 0.1% trifluoroacetic acid until the absorbance at 215 nm reaches the baseline, and the elution is performed with 95% acetonitrile containing 0.1% trifluoroacetic acid using a 0-60% linear gradient with a flow rate of l.Oml. / min.
- Glucagon does not contain Pro, but it is consistent with the results of degradation of the synthetic substrate.
- the preference of the residue at the P2 position is Val, Thr, and Ala. Has a very low affinity. K collagen digestion>
- LOOmM sodium acetate buffer pH 6.0, containing 150mM NaCl, 2mM DTT, and 2mM EDTA
- concentration of acid-soluble type I collagen in pig skin is 2.5 ⁇ .
- NsCys pink quache-catebucin L 2
- a novel cathepsin L-like enzyme derived from Aspergillus niger that degrades collagen is provided.
- the enzyme can be obtained from the liver and knee of the stomach or by introducing a gene encoding the enzyme and culturing transformed host cells, and is useful in a wide range of fields such as the food field, cosmetics field, and pharmaceutical field. Can be used.
- the present application was filed with the Japanese Patent Office on June 17, 2002, filed with the Japanese Patent Office in Japanese Patent Application No. 2002-175773, and on May 20, 2003, filed with the United States Patent Office by the present inventors.
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Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003241717A AU2003241717A1 (en) | 2002-06-17 | 2003-06-17 | Novel cathepsin l-like cysteine protease originating in pink shrimp |
CA002489736A CA2489736A1 (en) | 2002-06-17 | 2003-06-17 | Novel cathepsin l-like cysteine protease originating in pink shrimp |
JP2004513490A JP4355287B2 (ja) | 2002-06-17 | 2003-06-17 | ホッコクアカエビ由来の新規なカテプシンl様システインプロテアーゼ |
US10/849,162 US7595183B2 (en) | 2002-06-17 | 2004-05-20 | Cathepsins L-like cysteine protease derived from northern shrimp (Pandalus eous) |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-175773 | 2002-06-17 | ||
JP2002175773 | 2002-06-17 | ||
US47173303P | 2003-05-20 | 2003-05-20 | |
US60/471,733 | 2003-05-20 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/849,162 Continuation US7595183B2 (en) | 2002-06-17 | 2004-05-20 | Cathepsins L-like cysteine protease derived from northern shrimp (Pandalus eous) |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003106677A1 true WO2003106677A1 (ja) | 2003-12-24 |
Family
ID=29738421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/007661 WO2003106677A1 (ja) | 2002-06-17 | 2003-06-17 | ホッコクアカエビ由来の新規なカテプシンl様システインプロテアーゼ |
Country Status (6)
Country | Link |
---|---|
US (1) | US7595183B2 (ja) |
JP (1) | JP4355287B2 (ja) |
CN (1) | CN100408681C (ja) |
AU (1) | AU2003241717A1 (ja) |
CA (1) | CA2489736A1 (ja) |
WO (1) | WO2003106677A1 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101886065B (zh) * | 2010-06-28 | 2012-05-02 | 浙江大学 | 鲤鱼背肌中组织蛋白酶l的分离纯化方法 |
CN112852846B (zh) | 2021-02-05 | 2021-11-23 | 中国水产科学研究院淡水渔业研究中心 | 青虾Cathepsin L基因、其dsRNA及应用 |
CN113846078B (zh) * | 2021-11-30 | 2022-02-11 | 中国水产科学研究院黄海水产研究所 | 一种南极磷虾组织蛋白酶及其异源表达方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6544767B1 (en) * | 1994-10-27 | 2003-04-08 | Axys Pharmaceuticals, Inc. | Cathespin O2 protease |
US5736357A (en) * | 1994-10-27 | 1998-04-07 | Arris Pharmaceutical | Cathespin O protease |
US5776759A (en) * | 1996-09-26 | 1998-07-07 | Incyte Pharmaceuticals, Inc. | Two novel human cathepsin proteins |
US6033893A (en) * | 1997-06-26 | 2000-03-07 | Incyte Pharmaceuticals, Inc. | Human cathepsin |
US7045333B1 (en) * | 1998-01-16 | 2006-05-16 | Incyte Corporation | Human protease molecules |
US6232454B1 (en) * | 1998-02-27 | 2001-05-15 | Incyte Genomics, Inc. | Human proteinase molecules |
CN1295128A (zh) * | 2000-12-19 | 2001-05-16 | 中国科学院武汉病毒研究所 | 中国棉铃虫病毒组织蛋白酶基因 |
-
2003
- 2003-06-17 CN CNB038194902A patent/CN100408681C/zh not_active Expired - Fee Related
- 2003-06-17 CA CA002489736A patent/CA2489736A1/en not_active Abandoned
- 2003-06-17 JP JP2004513490A patent/JP4355287B2/ja not_active Expired - Lifetime
- 2003-06-17 WO PCT/JP2003/007661 patent/WO2003106677A1/ja active Application Filing
- 2003-06-17 AU AU2003241717A patent/AU2003241717A1/en not_active Abandoned
-
2004
- 2004-05-20 US US10/849,162 patent/US7595183B2/en active Active
Non-Patent Citations (5)
Also Published As
Publication number | Publication date |
---|---|
US20040253707A1 (en) | 2004-12-16 |
AU2003241717A1 (en) | 2003-12-31 |
CN100408681C (zh) | 2008-08-06 |
US7595183B2 (en) | 2009-09-29 |
JPWO2003106677A1 (ja) | 2005-10-13 |
CN1675358A (zh) | 2005-09-28 |
JP4355287B2 (ja) | 2009-10-28 |
CA2489736A1 (en) | 2003-12-24 |
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