WO2005001095A1 - 酢酸菌の増殖促進機能に関与する遺伝子及びその使用 - Google Patents
酢酸菌の増殖促進機能に関与する遺伝子及びその使用 Download PDFInfo
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- WO2005001095A1 WO2005001095A1 PCT/JP2004/008797 JP2004008797W WO2005001095A1 WO 2005001095 A1 WO2005001095 A1 WO 2005001095A1 JP 2004008797 W JP2004008797 W JP 2004008797W WO 2005001095 A1 WO2005001095 A1 WO 2005001095A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/195—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12J—VINEGAR; PREPARATION OR PURIFICATION THEREOF
- C12J1/00—Vinegar; Preparation or purification thereof
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12J—VINEGAR; PREPARATION OR PURIFICATION THEREOF
- C12J1/00—Vinegar; Preparation or purification thereof
- C12J1/04—Vinegar; Preparation or purification thereof from alcohol
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- the present invention relates to an acetic acid-resistant microorganism, more specifically, a gene encoding a protein having a growth promoting function derived from the microorganism, a microorganism having an increased copy number of the gene, and vinegar using these microorganisms. It relates to a method of manufacturing. Background art
- Acetic acid bacteria are microorganisms widely used in the production of vinegar, and in particular, acetic acid bacteria belonging to the genus Acetobacter and the genus Dalcon acetic acid are used for industrial acetic acid fermentation.
- acetic acid fermentation In acetic acid fermentation, ethanol in the medium is oxidized by acetic acid and converted to acetic acid, which results in acetic acid accumulating in the medium.Acetic acid is also inhibitory for acetic acid bacteria and the amount of acetic acid accumulated is reduced. As the concentration increases and the acetic acid concentration in the medium increases, the growth ability and fermentation ability of acetic acid bacteria gradually decrease.
- the period from the start of fermentation until the actual growth of acetic acid bacteria starts and acetic acid accumulation can be confirmed, that is, the period called the growth induction period, becomes longer as the acetic acid concentration increases. There is a tendency.
- PQQ 4,5-dihydro-1,4,5-dioxo
- a gene encoding a protein having the function of promoting the growth of acetic acid bacteria in the presence of high concentration acetic acid (acetic acid resistance) and shortening the so-called growth induction period is cloned.
- Efforts have been made to breed and improve acetic acid bacteria using the growth promoting gene.
- the growth-promoting gene of acetic acid bacteria has not been isolated so far, and under such circumstances, the growth of acetic acid bacteria in the presence of high-concentration acetic acid (acetic acid resistance) is promoted at a practical level, and the growth induction period is increased. It has been desired to isolate a novel gene having a growth-promoting function that encodes a protein having a function of shortening, and to breed acetic acid bacteria having a stronger growth function using this growth-promoting gene. Disclosure of the invention
- the present invention improves the growth function (acetate resistance) in the presence of acetic acid at a practical level and isolates a gene having a novel growth promoting function that encodes a protein capable of shortening the so-called lag phase.
- An object of the present invention is to provide a method for breeding acetic acid bacteria having an excellent growth promoting function using a gene having a promoting function, and for efficiently producing vinegar having a high acetic acid concentration using the acetic acid bacteria.
- an acetic acid bacterium capable of growing and fermenting even in the presence of acetic acid has a gene encoding a protein having a specific growth promoting function that is not present in other microorganisms. An attempt was made to isolate this gene, and succeeded in isolating such a new gene.
- the use of a gene encoding a protein having this growth-promoting function can improve the growth-promoting function of a microorganism and acetic acid resistance, and further contains a high concentration of acetic acid, which could not be obtained conventionally. It has been found that a new vinegar can be efficiently produced, and the present invention has been completed.
- the present invention provides the following (1) to (8).
- (C) Of the nucleotide sequence shown in SEQ ID NO: 1, a DNA consisting of a nucleotide sequence having a function as a primer or probe prepared from a part of the nucleotide sequence consisting of nucleotide numbers 180 to 137'6 DNA encoding a protein that hybridizes under stringent conditions and has a growth promoting function
- a microorganism having an enhanced growth promoting function wherein the copy number from the DNA of (2) or (3) is amplified in a cell.
- microorganism examples include an acetic acid bacterium belonging to the genus Acetobacter or the genus Dalcon acetic acid.
- a method for producing vinegar comprising culturing the microorganism of (6) in a medium containing alcohol, and producing and accumulating acetic acid in the medium.
- FIG. 1 is a schematic diagram of a restriction enzyme map and the like of a gene fragment (including pS10 and ompA) derived from Dalcon acetopactor 'entanii.
- FIG. 2 shows a fragment from Dalconacetobacter eentani which has a growth-promoting function.
- FIG. 4 is a diagram showing the progress of culture of a transformant in which the copy number of a gene has been amplified in an acetic acid-containing medium.
- FIG. 3 is a view showing an amino acid sequence (SEQ ID NO: 2) of a protein encoded by a gene involved in a growth promotion function derived from Dalconacetopactor 'entanii.
- FIG. 4 is a diagram showing a construction diagram of pGI18 and a restriction enzyme map. BEST MODE FOR CARRYING OUT THE INVENTION
- the present inventors have developed a method for isolating a gene having a growth promoting function from acetic acid bacteria, and have attempted to isolate a gene having such a function.
- a chromosomal DNA library of an acetic acid bacterium is constructed, and the chromosomal DNA library is used to transform an acetic acid bacterium, which usually requires 4 days for growth on an agar medium in the presence of 1% acetic acid.
- a gene having a growth promoting function is isolated from the acetic acid bacterium by screening an acetic acid bacterium strain capable of growing on the same medium in 3 days.
- the obtained acetate resistance gene was homologously searched in DDB J ZEMB L Genbank and SWI SS-P ROT / PIR, and as a result, the omp A gene and Caulobacter ′ Talecentas (Escherichia coli) found in Escherichia coli were identified. It has a certain degree of homology with a group of proteins produced by the omp A gene of Caulobacter crescentus) and was estimated to be the omp A gene of acetic acid bacteria.
- the ompA gene of Escherichia coli is 36%
- the ompA gene of Lacta-Talecentas (Caulobacter crescentus) is 30% homologous at the amino acid sequence level, and the degree of homology is extremely low.
- ompA gene a novel gene that encodes a novel protein specific to acetic acid bacteria (hereinafter also referred to as protein OMPA).
- acetic acid tolerance was remarkably improved in a copy number-amplified transformant produced by linking the omp A gene to a plasmid vector and transforming it into acetic acid bacteria (see Example 3). ). Furthermore, when this transformant is cultured in aeration culture in the presence of ethanol, its acetic acid fermentation ability, especially its growth promotion function, is significantly improved, and its growth promotion (acetic acid resistance) in the presence of high concentration acetic acid is improved. It was confirmed that the induction period was shortened, the growth rate was increased, and the concentration of acetic acid capable of growing was increased (see Examples 2 to 4).
- the ompA gene certainly encodes a protein having a protein having a growth promoting function and is expressed so as to exert the function of the protein. From the above, the present inventor considered that vinegar with a high acetic acid concentration could be efficiently produced by using a microorganism having an amplified copy number of the ompA gene.
- the DNA of the present invention encodes the ompA gene derived from acetic acid bacteria and a regulatory sequence of the gene, and encodes a protein having a function of improving acetic acid resistance and a function of promoting growth. Presumed (SEQ ID NO: 2).
- the DNA of the present invention can be obtained from the chromosomal DNA of Gluconacetobacter entanii as follows.
- Dalcon Acetobacter entanii for example, Acetobacter altoacetigenes MH-24 (Acetobacter altoacetigenes MH-24) strain (Independent Administrative Institution, National Institute of Advanced Industrial Science and Technology
- a chromosomal DNA library having a deposit number of F ERM BP—491, which was deposited on February 23, 1984 (originally deposited) at 1st address, 1st center, 6th) is prepared.
- the chromosomal DNA can be obtained by a conventional method (for example, see JP-A-60-9489).
- a chromosome DNA library is prepared from the chromosome DNA obtained as described above.
- chromosomal DNA is partially digested with an appropriate restriction enzyme to obtain a mixture of various fragments.
- restriction enzymes can be used by adjusting the degree of cleavage by adjusting the cleavage reaction time.
- Sau3AI is allowed to act on chromosomal DNA at a temperature of 30 ° C or higher, preferably 37 ° C, at an enzyme concentration of 1 to 10 units Zm1 for various times (1 minute to 2 hours). Digest.
- the cut chromosomal DNA fragment is ligated to a vector DNA capable of autonomous replication in acetic acid bacteria to prepare a recombinant vector.
- a restriction enzyme for example, BamHI
- Sau3AI used for chromosomal DNA cleavage was used at a temperature of 30 ° C and an enzyme concentration of! Under the condition of ⁇ 100 units Zm1, the DNA is allowed to act on the vector DNA for at least 1 hour to completely digest it and cleave it.
- the chromosomal DNA fragment mixture obtained as described above and the cleaved and cleaved vector DNA are mixed, and T4 DNA ligase is heated at a temperature of 4 to 16 ° C and an enzyme concentration of 1 to 100 units Zm
- the cells are allowed to act for 1 hour or more, preferably 6 to 24 hours, under the conditions of 1 to obtain a recombinant vector.
- acetic acid bacterium that normally requires 4 days for growth in the presence of 1% acetic acid on an agar medium, for example, Acetobacter 'Aceti No. 1023 strain (AcetobacteracetiNo. .1023) Co., Ltd. (Deposited at the National Institute of Advanced Industrial Science and Technology, Patent Organism Depositary) (1-1, Higashi 1-1, Tsukuba, Ibaraki, Japan) on June 27, 1996 (Original Deposit) No.
- DNA of the present invention include DNA having the nucleotide sequence shown in SEQ ID NO: 1, wherein the nucleotide sequence consisting of nucleotide numbers 180 to 136 is a coding region, It encodes the protein shown in SEQ ID NO: 2.
- the nucleotide sequence shown in SEQ ID NO: 1 and the amino acid sequence shown in SEQ ID NO: 2 was homologously searched in DD BJ / EMB L / Gen Bank and SWI SS-P ROT / PIR, and found that Escherichia coli
- the omp A gene of the protein has 36% homology at the amino acid sequence level
- the omp A gene of Caulobacter crescentus has 30% homology at the amino acid sequence level
- the protein ⁇ MP A These genes were estimated to be genes encoding the same, but all had low homology of 40% or less, and were clearly different from these genes.
- the nucleotide sequence of the ompA gene encoded by the DNA of the DNA of the present invention has been clarified, for example, the genomic DNA of the acetic acid bacterium Dalcon acetopactor 'entanii' is used as type ⁇ , and It can also be obtained by polymerase chain reaction (PCR reaction) using an oligonucleotide synthesized based on the primer as a primer, or by hybridization using an oligonucleotide synthesized based on the base sequence as a probe.
- PCR reaction polymerase chain reaction
- a DNA having a function as such a primer or a probe and prepared from a partial sequence of the ompA gene is also included in the DNA of the present invention.
- DNA consisting of the sequences shown in SEQ ID NOs: 3 and 4 can be used as a primer in the present invention.
- “having a function as a primer or a probe” means having a base sequence length, a base composition of a base sequence, or the like that can be used as a primer or a probe.
- the design of a DNA to function as is well known to those skilled in the art.
- the DNA can be synthesized, for example, using various commercially available DNA synthesizers according to a standard method.
- the PCR reaction was performed using a Thermonocycler Gene Amp PCR System 9700 manufactured by Applied Biosystems, and using Taq DNA polymerase (manufactured by Takara Bio) and KOD-Plus-(Toyobo Co., Ltd.). Can be performed according to a standard method.
- the OMP A protein of the present invention is encoded by the above DNA, and specifically includes the amino acid sequence shown in SEQ ID NO: 2. As long as the protein containing the amino acid sequence shown in SEQ ID NO: 2 has a growth promoting function, Mutations such as substitutions, deletions, insertions, additions, and inversions may occur in a plurality, preferably one or several amino acids in the amino acid sequence.
- 1 to 10, preferably 1 to 5 amino acids of the amino acid sequence shown in SEQ ID NO: 2 may be deleted, and 1 to 10, preferably 1 to 10 amino acids in the amino acid sequence shown in SEQ ID NO: 2
- One to five amino acids may be added, or one in which 1 to 10, preferably 1 to 5 amino acids in the amino acid sequence shown in SEQ ID NO: 2 are substituted with another amino acid
- a DNA encoding a protein having a growth promoting function containing a mutant amino acid sequence as described above may be deleted, substituted, inserted, or added to an amino acid at a specific site by, for example, site-directed mutagenesis, or Can also be obtained by modifying the base sequence.
- the DNA modified as described above can also be obtained by a known mutation treatment.
- a mutant DNA of the present invention which encodes a protein having a growth promoting function
- a known method such as the Kunkel method and the gapped duplex method or a method similar thereto can be adopted.
- the mutation is introduced using a mutagenesis kit using site-directed mutagenesis (for example, Mutan-K (manufactured by Takara Bio Inc.) or Mutan-G (manufactured by Takara Bio Inc.)).
- gene mutation can be introduced or a chimeric gene can be constructed by techniques such as error-introduced PCR and DNA shuffling.
- Error-introducing PCR and DNA shuffling techniques are known in the art. For example, for error-introducing PCR, see Chen K, and Arnold FH. 1993, Proc. Natl. Acad. Sci. USA, 90 See 5618-5622, and for DNA shuffling see Stemmer WP 1994, Nature, 370: 389-391 and Stemmer WP, 1994, Proc. Natl. Acad. Sci. USA 91: 10747-10751.
- the term “proliferation promoting function” refers to a function of promoting the growth of microorganisms in the presence of acetic acid, and more specifically, a high growth rate in the presence of acetic acid, It means that the amount of growth is large, and that the upper limit of the acetic acid concentration at which growth or acetic acid fermentation is possible is high.
- the gene into which the mutation has been introduced encodes a protein having a growth-promoting function can be confirmed by determining the presence or absence of growth in a medium containing acetic acid as shown in the Examples. .
- amino acid sequence of a protein and the nucleotide sequence encoding the same differ slightly between species, strains, mutants, and variants, so DNA encoding substantially the same protein is used.
- DNA encoding substantially the same protein is used.
- acetobacterium of the genus Acetobacter ⁇ dalconacetopactor or acetic acid bacterium of the genus Acetobacter ⁇ dalconacetopactor, or a naturally-occurring mutant or variant thereof, for example, the sequence Of the base sequence shown in No. 1, DNA consisting of a part of the base sequence complementary to the base sequence consisting of base sequence numbers 180 to 1376, or base sequence numbers 180 to 1376
- a DNA consisting of a nucleotide sequence which can be a probe prepared from a part of a DNA consisting of a DNA consisting of a DNA consisting of a protein having a growth-promoting function.
- the stringent conditions refer to conditions under which a so-called specific hybrid is formed and a non-specific hybrid is not formed.
- nucleic acids with high homology for example, nucleic acids with a homology of 70% or more, hybridize with each other and have lower homology.
- washing conditions for hybridization such as washing at 60 ° C. at a salt concentration equivalent to 0.1% SDS with 1 ⁇ SSC.
- the DNA of the present invention encodes a protein OMPA having a growth promoting function
- the DNA of the present invention is used to produce a microorganism having an enhanced growth promoting function in the presence of acetic acid, that is, a microorganism having enhanced acetic acid resistance. can do.
- the enhancement of the growth promoting function in a microorganism can be achieved, for example, by ligating an ompA gene to a recombinant vector and transforming the microorganism with the vector to amplify the copy number of the gene in a cell.
- the recombinant vector of the present invention can be obtained by ligating the DNA encoding the OMPA protein described in the preceding section “2. DNA and protein of the present invention” to a suitable betater, and a transformant is obtained. It can be obtained by transforming a host so that the omp A gene can be expressed using the recombinant vector of the present invention.
- a recombinant vector a phage or a plasmid capable of autonomous propagation in a host can be used.
- Examples of the plasmid DNA include Escherichia coli-derived plasmids (eg, pBR322, pBR325, pUC118, pET16b, etc.), and Bacillus subtilis-derived plasmids (eg, pUB11). 0, pTP5, etc.), yeast-derived plasmids (eg, YEpi3, YCp50, etc.), and the phage DNA include I phage (gtlO, ZAP, etc.). Furthermore, transformants can be prepared using animal virus vectors such as retrovirus or vaccinia virus, insect virus vectors such as baculovirus, bacterial artificial chromosomes (BAC), yeast artificial chromosomes (YAC), and the like. .
- animal virus vectors such as retrovirus or vaccinia virus
- insect virus vectors such as baculovirus, bacterial artificial chromosomes (BAC), yeast artificial chromosomes (YAC), and the like. .
- the target DNA can be introduced into a host using a multicopy vector or transposon, and such a multicopy vector or transposon is included in the recombinant vector of the present invention.
- Multicopy vectors include pUF106 (see, for example, Fujiwara, M. et al., Cellulose, 1989, 153-158) and pMV24 (for example, Fukaya, M. et al., Appl. Environ. Microbiol. , 1989, 55: 171-176), pGI18 (see, for example, Japanese Patent Application No. 2003-3502265; Example 3), pTA501 (A) And pTA5001 (B) (for example, see Japanese Patent Application Laid-Open No. 60-94888).
- PMVL1 which is a chromosome integration type vector (for example, Okumura, H. et al. al., Agric. Biol. Chem., 1988, 52: 3125-3129). Also, as a transposon Examples include Mu and IS1452.
- the purified DNA is digested with an appropriate restriction enzyme, inserted into an appropriate vector DNA restriction enzyme site or a multicloning site, and ligated to the vector. A method is adopted.
- the DNA of the present invention needs to be incorporated into a vector so that the function of the gene encoded by the DNA is exhibited. Therefore, in addition to the promoter and the DNA of the present invention, a cis element such as an enhancer, a splicing signal, a polyA addition signal, a selectable marker, a liposome binding sequence (SD sequence), and the like may be ligated to the recombinant vector of the present invention. can do.
- the selection marker include a dihydrofolate reductase gene, a kanamycin resistance gene, a tetracycline resistance gene, an ampicillin resistance gene, and a neomycin resistance gene.
- the sequence for homologous recombination must be used.
- a vector may be constructed, and homologous recombination may be caused on a chromosome of a microorganism using the vector.
- promoter sequences include the ampicillin resistance gene of Escherichia coli plasmid pBR322 (manufactured by Takara Bio Inc.), the kanamycin resistance gene of plasmid pHSG298 (manufactured by Takara Bio Inc.), and the like.
- C Homologous recombination which includes promoter sequences derived from microorganisms other than acetic acid bacteria, such as the chloramphenicol resistance gene of plasmid pHSG396 (manufactured by Takara Bio Inc.) and the promoter of each gene such as galactosidase gene.
- the construction of vectors for carrying out is well known to those skilled in the art.
- the microorganism used for transformation is not particularly limited as long as it can express the introduced DNA.
- fungi such as bacteria (Escherichia coli, Bacillus subtilis, lactic acid bacteria, etc.) and yeasts of the genus Paspergillus can be mentioned.
- acetic acid bacteria for the purpose of enhancing its growth promoting function, it is preferable to use acetic acid bacteria as the microorganism. Good.
- bacteria belonging to the genus Acetobacter and the genus Dalcon acetic acid are preferable.
- Examples of bacteria belonging to the genus Acetobacter include Acetobacter aceti, and specifically, for example, Acetobacter aceti No. 103 strain (FERM BP-22887), The Acetobacter 'Aceti' subsp.
- DSM6160 strain and Gluconacetobacter entanii, and specifically, for example, Acetobacter altoacetigenes MH-24 strain (FERMBP-491) can be used.
- the method for introducing the recombinant vector into bacteria containing acetic acid bacteria is not particularly limited as long as it is a method for introducing DNA into bacteria.
- a method using calcium ions see, for example, Fukaya, M. et al., Agric. Biol. Chem., 1985, 49: 2091-2097
- an electroporation method for example, Wong, H. et al., Pro atl. Acad. Sci. USA, 1990, 87: 8130-8134.
- the method of introducing a recombinant vector into yeast is a method of introducing DNA into yeast.
- the method is not particularly limited as long as it is, for example, an electoral port method, a spheroplast method, a lithium acetate method and the like.
- Transformants are selected based on the properties of the marker gene comprised in the gene to be introduced. For example, when a neomycin resistance gene is used, a microorganism that is resistant to a G418 drug is selected.
- the transformant is a recombinant vector containing at least a nucleic acid having the nucleotide sequence shown in SEQ ID NO: 1, for example, an acetic acid bacteria-E. Coli shuttle vector (multicopy vector) Insert the nucleic acid into pUF106
- an acetic acid bacteria-E. Coli shuttle vector multicopy vector
- pOMPA1 Inserts the nucleic acid into pUF106
- FERMBP-22887 acetobacter aceti No. 102
- FERMBP-22887 acetobacterium-E. Coli shuttle vector.
- the recombinant vector p OMP A2 in which the nucleic acid has been introduced into pGI 18 is introduced into Acetobacter aceti subsp.
- Zylinum IFO 3288 Acetobacter aceti subsp. Xylinum IF03288) strain.
- the production amount and production efficiency of acetic acid can be increased by enhancing the growth promoting function as described above.
- a microorganism (produced as described in the previous section “3. Acetic acid-resistant microorganism of the present invention”) whose growth promotion function has been selectively enhanced by amplifying the copy number of the gene having the growth promotion function ( (Acetic acid bacteria) which have the ability to oxidize alcohols can grow in the presence of acetic acid and produce acetic acid, and can be used for the production of vinegar. Therefore, it is possible to efficiently produce vinegar containing a high concentration of acetic acid by culturing a microorganism having an amplified copy number of the ompA gene in an alcohol-containing medium and producing and accumulating acetic acid in the medium. Can be.
- the acetic acid fermentation in the production method of the present invention may be carried out in the same manner as the conventional vinegar production method by the conventional acetic acid bacteria fermentation method, and is not particularly limited.
- the medium used for acetic acid fermentation contains a carbon source, a nitrogen source, an inorganic substance, and ethanol.If necessary, a synthetic medium is used as long as it contains an appropriate amount of a nutrient source required for growth. A medium may be used.
- the carbon source examples include various carbohydrates such as glucose and sucrose, and various organic acids.
- a natural nitrogen source such as peptone or a fermentation cell decomposition product can be used.
- the cultivation is performed under aerobic conditions such as a stationary culture method, a shaking culture method, and an aeration-agitation culture method, and the culture is usually performed at 30 ° C.
- the pH of the medium is usually in the range of 2.5 to 7, preferably in the range of 2.7 to 6.5, depending on various acids, various bases, buffers and the like. Can also be prepared. Normal culture is performed for 1 to 21 days.
- the present invention it is possible to impart and enhance a growth promoting function to a microorganism.
- the growth function acetic acid resistance
- the growth induction period is remarkably shortened.
- the ability to efficiently accumulate can be provided.
- the microorganisms (acetic acid bacteria) bred in this way are useful for producing vinegar containing high concentrations of acetic acid.
- Gunolet 6 strains of Acetobacter altoacet igenes MH-24 (F ERM BP—491), a strain of ⁇ -nacetonobacter entanii, which is a strain of Gluconacetobacter entanii.
- Shaking culture was performed at 30 ° C. in a YPG medium (3% glucose, 0.5% yeast extract, 0.2% polypeptide) supplemented with 4% acetic acid and 4% ethanol. After culturing, the culture was centrifuged (7,500 X g, 10 minutes) to obtain bacterial cells. Chromosome DNA was prepared from the obtained cells according to the chromosome DNA preparation method described in JP-A-60-9489.
- the chromosome DNA obtained as described above is partially digested with a restriction enzyme Sau3AI (manufactured by TAKARAPIO), and the E. coli monoacetic acid shuttle vector pUF106 is restricted with a restriction enzyme BamHI. And digested. These DNAs are mixed in an appropriate amount, and ligated using a ligation kit (TaKaRa DNA Ligation Kit Ver.2, manufactured by Takara Bio Inc.). One built.
- the chromosome DNA lipalyse of Darcon acetopacta entaniii obtained as described above is usually grown on an agar medium containing 1% acetic acid for 4 days.
- o. Transform the strain 103 (FERM BP-22887) on YPG agar medium containing 1% acetic acid and 100 ⁇ gZm1 ampicillin at 30 ° C for 3 days. Cultured. The colonies formed in 3 days were inoculated and cultured in a YPG medium containing 100 ⁇ g / m1 of ampicillin, and the plasmid was recovered from the obtained cells.
- a 3 kbp Sau3AI fragment has been cloned and this plasmid was named pS10.
- the acetopactor .Aceti No. 103 strain which normally requires 4 days for growth on an agar medium containing 1% acetic acid, can grow on an agar medium containing 1% acetic acid in 3 days.
- a gene fragment having a growth promoting function was obtained.
- the cloned Sau3AI fragment was inserted into the BamHI site of pUC19, and the nucleotide sequence of the fragment was determined by Sanger's dideoxy chain 'termination method. The nucleotide sequence shown in No. 1 was determined. Sequencing was performed on all regions of both DNA strands, with all breaks overlapping. The gene thus obtained was named ompA.
- Example 2 Effect of shortening the induction period in a transformant transformed with a gene having a growth-promoting function derived from Dalconacetopactor entanii
- Acetobacter altoacetogenes MH cloned according to Example 1 The omp A gene from 24 strains (FERM BP—49 1) was amplified by PCR using KOD—P 1 us— (manufactured by Toyobo Co., Ltd.). A plasmid p OMP A1 inserted into the restriction enzyme Sma I cleavage site of the E. coli shuttle vector p UF106 (see, for example, Fujiwara, M. et al., CELLULOSE, 1989, 153-158) was prepared. . Figure 1 shows the outline of the amplified fragment inserted into p OMP AI.
- Figure 1 shows the restriction enzyme map of the gene fragment (p SIO) derived from Dalcon acetobacta 1.entanii cloned using Sau3AI, the location of the gene having a growth promoting function, and p OMP A1. Shows the fragment of the import.
- the PCR method was specifically performed as follows. Specifically, genomic DNA of strain Acetobacter altoacetigenes MH-24 was used as a mirror type, and primers 1 (5′-GTTTC CCGGAATTC CCGTTTCAG CTCCTTC 13 ′: SEQ ID NO: 3) and primer 2 (5, 1 Using ATATCTT TCAGGGCATTTGGAGGTATTCCG-3 ': SEQ ID NO: 4), PCR was carried out under the following PCR conditions using KOD-Plus- (manufactured by Toyobo Co., Ltd.).
- the PCR method was performed for 30 cycles at 94 ° C. for 15 seconds, 60 ° C. for 30 seconds, and 68 ° C. for 1 minute as one cycle.
- This pOMPAl was transformed into an Acetopator 'Aceti No. 103 strain by electroporation (see, for example, Wong, HC. Et al., Proc. Natl. Acad. Sci. USA, 1990, 87: 8130-8134). ). Transformants were selected on a YPG agar medium supplemented with 100 ⁇ g / ml of ampicillin and 1% acetic acid.
- Plasmids were extracted from the ampicillin-resistant transformant grown on the selection medium in 3 days and analyzed by a standard method, and it was confirmed that the plasmid possesses a gene that possesses a gene that promotes growth. did.
- the ampicillin-resistant transformant having the plasmid p OMP A1 obtained as described above was compared with the original strain Acetobacter 1.aceti No. 1023 having only the shuttle vector pUF106.
- the acetic acid fermentation ability was compared. Specifically, using a 5 L mini-jar (manufactured by Mitsui Chemicals, Inc .; KM J-5A), 2.5% containing 1% of acetic acid, 4% of ethanol and 100 ⁇ g / m1 of ampicillin was used. ⁇ ?
- the medium was subjected to aeration and stirring culture at 30 ° C, 400 rpm, and 0.20 vvm in a 0 medium, and fermentation was performed to an acetic acid concentration of 3%.
- pGI18 is an approximately 3. 1kb plasmid pGI1 and pUC18 derived from the Acetobacter altoacetigenes MH-24 strain (FERM BP-491). And made from.
- cells are collected from a culture solution of Acetobacter altoacetigenes MH-24 (Acetobacter altoacetigenes MH-24) strain (FERM BP-4991), and sodium hydroxide or dodecyl. After lysis using sodium sulfate, the cells were treated with phenol and the plasmid DNA was purified with ethanol.
- the obtained plasmid was identified in three places in Hinc II and one place in Sfi I. It is a circular double-stranded DNA plasmid with a ligated site, and the overall length of the plasmid is about
- This plasmid was designated as pGI1 and used to construct the vector pGI18.
- the plasmid pGI1 obtained above was amplified by the PCR method using KOD-P1us- (manufactured by Toyobo Co., Ltd.) and cut with AatII. This fragment was inserted into the pUC18 restriction enzyme AatII cleavage site to produce a plasmid pGI18 (FIG. 4).
- the PCR method was specifically performed as follows. That is, the plasmid pGI1 was used as a cycline type, primer A (SEQ ID NO: 6) and primer B (SEQ ID NO: 7) having a restriction enzyme A at II recognition site were used as primers, and the following PCR conditions were used. PCR was performed.
- the PCR method was performed for 30 cycles, with 30 seconds at 60 ° C, 30 seconds at 60 ° C, and 3 minutes at 68 ° C, as one cycle.
- the obtained plasmid pGI18 contains both pUC18 and pGI1, and has a total length of about 580 base pairs (5.8 kbp).
- nucleotide sequence of this plasmid pGI18 is shown in SEQ ID NO: 5.
- Example 2 Transformation into Acetobacter / Aceti / Subspecies / Zyrinam Acetobacter altoacetogenes MH-24 obtained in Example 1 (Acetobacter altoacetigenes MH-24) strain (FE RM BP—491)
- a gene having the function of promoting the growth of yeast is amplified by the PCR method using KOD-Plus- (manufactured by Toyobo Co., Ltd.), and the amplified DNA fragment is used for the acetic acid bacteria-E. Coli shuttle prepared in (1). After cutting pGI18 with the restriction enzyme SmaI, the amplified DNA fragment was inserted into the site to produce plasmid pOMPA2.
- FIG. Figure 1 is S au 3 cloning using AI has been dull con ⁇ Seto Park terpolymers' Enta two-derived gene fragment (p S 1 0) 1 shows a restriction map of the present invention, the position of a gene having a growth promoting function, and a fragment inserted into P ⁇ MPA2.
- the PCR method was specifically performed as follows. Specifically, genomic DNA of the strain Acetobacter. Artacetigenes MH-24 was used as type I, and primers 1 (5'-GTTTC CCGGAATTCC CGTTTCAG CTCCTTC-1, SEQ ID NO: 3) and primer 2 (5, 1 ATATCTT Using TCAGGGCATTTGGAGGTATTCCG-3 ': SEQ ID NO: 4), PCR was carried out using KOD-Plus- (manufactured by Toyobo Co., Ltd.) under the following PCR conditions.
- KOD-Plus- manufactured by Toyobo Co., Ltd.
- Xylinum IF ⁇ 2888 (Acetobacter aceti subsp. Xylinum IF03288) was transformed by the electroporation method (see, for example, Wong, HC. Et al., Proc. Natl. Acad. Sci. USA, 1990, 87: 8130-8134). The transformant was selected on a YPG agar medium supplemented with 10 ° ⁇ g / ml of ampicillin and 1% of acetic acid.
- Plasmids were extracted from the ampicillin-resistant transformant grown on the selective medium and analyzed according to a standard method, and it was confirmed that the plasmid retained the plasmid containing the acetate resistance gene.
- the ampicillin-resistant transformed transformant having the plasmid p OMP A2 obtained in the above (2) was grown on a YPG medium containing acetic acid, and the original strain was introduced only with the shuttle vector pGI18.
- Case 1 Pactor Asechi Subspecies, Zirinham IFO 3288 compared with 288 shares.
- shaking culture 150 rpm was performed in 100 ml of YPG medium containing 3% acetic acid and 100 ⁇ g / m1 of ampicillin at 30 ° C, followed by transformation.
- acetate containing medium 6 6 0 c a result of comparison by measuring the bacterial deactivation concentration in nm, as shown in FIG. 2, in 3% acetic acid supplemented medium, (shown by white circles) transformants was able to grow, whereas the former strain, Acetobacter p. Acetii subspecies.
- Xilinam IF ⁇ 3288 shown by a black circle
- the resistance enhancement function was confirmed.
- Example 4 Acetic acid fermentation test of a transformant transformed with a gene having a growth-promoting function derived from Dalconacetopactor entanii
- the ampicillin-resistant transformant having the plasmid p OMP A2 obtained in Example 3 was compared with the original strain Acetobacter, which introduced only the shuttle vector pGI18-1.Acetich subspecies Zirinum IFO 3288. The acetic acid fermentation ability was compared.
- a 5-liter mini jar (manufactured by Mitsui Chemicals, Ltd .; KM J-5A) is filled with a 1% acetic acid concentration and a 4% alcohol concentration YPG medium, and the transformed strain or the original strain is reduced to 0%. 4% was inoculated, and aeration and agitation culture at 500 rpm and 0.20 vvm was started at a fermentation temperature of 32 ° C.
- Table 3 shows the acetic acid fermentation ability when the flow rate of the transformed strain was almost equivalent to that of the original strain during continuous fermentation at an acetic acid concentration of 7.2%.
- a novel gene having a growth promoting function is provided.
- the growth function acetic acid tolerance
- the growth induction period is shortened, and acetic acid resistant vinegar with improved acetic acid resistance can be produced with high efficiency. It is possible to obtain seeds. Therefore, the present invention is useful for producing vinegar having a high acetic acid concentration with high efficiency.
- SEQ ID NOs: 3, 4, 6, and 7 synthetic oligonucleotides
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DE602004009931T DE602004009931T2 (de) | 2003-06-26 | 2004-06-16 | An der wachstumsfördernden funktion des essigsäurebakteriums beteiligtes gen und verwendungen davon |
JP2005511020A JP4551870B2 (ja) | 2003-06-26 | 2004-06-16 | 酢酸菌の増殖促進機能に関与する遺伝子及びその使用 |
US10/561,834 US7541491B2 (en) | 2003-06-26 | 2004-06-16 | Gene involved in growth-promoting function of acetic acid bacteria and uses thereof |
EP04746266A EP1642977B1 (en) | 2003-06-26 | 2004-06-16 | Gene involved in growth-promoting function of acetic acid bacteria and uses thereof |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2007100036A1 (ja) * | 2006-03-03 | 2007-09-07 | Mizkan Group Corporation | 酢酸菌の増殖促進機能に関与する遺伝子、該遺伝子を用いて育種された酢酸菌、及び該酢酸菌を用いた食酢の製造方法 |
JP4551978B1 (ja) * | 2010-05-12 | 2010-09-29 | 株式会社ミツカングループ本社 | 酢酸菌の増殖促進機能に関与する遺伝子、該遺伝子を用いて育種された酢酸菌、及び該酢酸菌を用いた食酢の製造方法 |
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CN102226142B (zh) * | 2011-05-06 | 2012-09-19 | 江南大学 | 一种用于固态酿造食醋发酵过程的生物强化方法 |
CN105368828B (zh) * | 2015-11-04 | 2019-01-15 | 苏州天绿生物制药有限公司 | 一种高效全细胞催化鹅去氧胆酸合成熊去氧胆酸的方法 |
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- 2004-06-16 JP JP2005511020A patent/JP4551870B2/ja not_active Expired - Fee Related
- 2004-06-16 EP EP04746266A patent/EP1642977B1/en not_active Expired - Fee Related
- 2004-06-16 CN CNA2004800244655A patent/CN1842595A/zh active Pending
- 2004-06-16 DE DE602004009931T patent/DE602004009931T2/de not_active Expired - Fee Related
- 2004-06-16 US US10/561,834 patent/US7541491B2/en not_active Expired - Fee Related
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007100036A1 (ja) * | 2006-03-03 | 2007-09-07 | Mizkan Group Corporation | 酢酸菌の増殖促進機能に関与する遺伝子、該遺伝子を用いて育種された酢酸菌、及び該酢酸菌を用いた食酢の製造方法 |
JP2007236203A (ja) * | 2006-03-03 | 2007-09-20 | Mitsukan Group Honsha:Kk | 酢酸菌の増殖促進機能に関与する遺伝子、該遺伝子を用いて育種された酢酸菌、及び該酢酸菌を用いた食酢の製造方法 |
JP4528270B2 (ja) * | 2006-03-03 | 2010-08-18 | 株式会社ミツカングループ本社 | 酢酸菌の増殖促進機能に関与する遺伝子、該遺伝子を用いて育種された酢酸菌、及び該酢酸菌を用いた食酢の製造方法 |
US8067538B2 (en) | 2006-03-03 | 2011-11-29 | Mizkan Group Corporation | Gene related to growth promoting function of acetic acid bacterium, acetic acid bacterium bred using the gene and method for producing vinegar using the acetic acid bacterium |
JP4551978B1 (ja) * | 2010-05-12 | 2010-09-29 | 株式会社ミツカングループ本社 | 酢酸菌の増殖促進機能に関与する遺伝子、該遺伝子を用いて育種された酢酸菌、及び該酢酸菌を用いた食酢の製造方法 |
JP2010213714A (ja) * | 2010-05-12 | 2010-09-30 | Mitsukan Group Honsha:Kk | 酢酸菌の増殖促進機能に関与する遺伝子、該遺伝子を用いて育種された酢酸菌、及び該酢酸菌を用いた食酢の製造方法 |
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US20060228445A1 (en) | 2006-10-12 |
US7541491B2 (en) | 2009-06-02 |
DE602004009931D1 (de) | 2007-12-20 |
JPWO2005001095A1 (ja) | 2006-10-26 |
CN1842595A (zh) | 2006-10-04 |
EP1642977B1 (en) | 2007-11-07 |
DE602004009931T2 (de) | 2008-08-28 |
JP4551870B2 (ja) | 2010-09-29 |
EP1642977A4 (en) | 2006-10-04 |
EP1642977A1 (en) | 2006-04-05 |
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