WO2022231056A1 - L-라이신 생산능이 향상된 코리네박테리움 글루타미쿰 변이주 및 이를 이용한 l-라이신의 생산 방법 - Google Patents
L-라이신 생산능이 향상된 코리네박테리움 글루타미쿰 변이주 및 이를 이용한 l-라이신의 생산 방법 Download PDFInfo
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- WO2022231056A1 WO2022231056A1 PCT/KR2021/006681 KR2021006681W WO2022231056A1 WO 2022231056 A1 WO2022231056 A1 WO 2022231056A1 KR 2021006681 W KR2021006681 W KR 2021006681W WO 2022231056 A1 WO2022231056 A1 WO 2022231056A1
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- WO
- WIPO (PCT)
- Prior art keywords
- lysine
- corynebacterium
- corynebacterium glutamicum
- mutant
- strain
- Prior art date
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Images
Classifications
-
- 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
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/74—Vectors or expression systems specially adapted for prokaryotic hosts other than E. coli, e.g. Lactobacillus, Micromonospora
- C12N15/77—Vectors or expression systems specially adapted for prokaryotic hosts other than E. coli, e.g. Lactobacillus, Micromonospora for Corynebacterium; for Brevibacterium
-
- 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
- C12N9/10—Transferases (2.)
- C12N9/1022—Transferases (2.) transferring aldehyde or ketonic groups (2.2)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P13/00—Preparation of nitrogen-containing organic compounds
- C12P13/04—Alpha- or beta- amino acids
- C12P13/08—Lysine; Diaminopimelic acid; Threonine; Valine
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y202/00—Transferases transferring aldehyde or ketonic groups (2.2)
- C12Y202/01—Transketolases and transaldolases (2.2.1)
- C12Y202/01001—Transketolase (2.2.1.1)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
- C12R2001/01—Bacteria or Actinomycetales ; using bacteria or Actinomycetales
- C12R2001/15—Corynebacterium
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
- C12R2001/01—Bacteria or Actinomycetales ; using bacteria or Actinomycetales
- C12R2001/265—Micrococcus
- C12R2001/28—Micrococcus glutamicus ; Corynebacterium glutamicum
Definitions
- the present invention relates to a Corynebacterium glutamicum mutant having improved L-lysine-producing ability and a method for producing L-lysine using the same.
- L-lysine is an essential amino acid that is not synthesized in humans or animals and must be supplied from the outside, and is generally produced by fermentation using microorganisms such as bacteria or yeast.
- L- lysine production may use a wild-type strain obtained in the natural state or a mutant strain modified to improve its L- lysine production ability.
- genetic recombination technology has been applied to microorganisms such as Escherichia coli and Corynebacterium, which are often used for the production of L-amino acids and other useful substances, and has excellent L-lysine production ability.
- Various recombinant strains or mutants and L-lysine production methods using the same are being developed.
- Korean Patent Application Laid-Open No. 10-2020-0026881 discloses a method of changing an existing promoter of a gene to a promoter having strong activity in order to increase the expression of a gene encoding an enzyme involved in L-lysine production.
- An object of the present invention is to provide a mutant Corynebacterium glutamicum having improved L-lysine production ability.
- Another object of the present invention is to provide a method for producing L-lysine using the mutant.
- the present inventors studied to develop a new mutant with improved L-lysine production ability using a Corynebacterium glutamicum strain. As a result, within the promoter of the tkt gene encoding the transketolase involved in the L-lysine biosynthesis pathway. The present invention was completed by confirming that the production of L-lysine was increased when the nucleotide sequence at a specific position was substituted.
- One aspect of the present invention provides a Corynebacterium glutamicum mutant with enhanced L-lysine production ability by enhancing the activity of transketolase.
- Transketolase as used in the present invention is an enzyme that catalyzes the reaction of making sedoheptulose phosphate by transferring a ketol group (HOCH 2 CO - ) from xylulose phosphate to ribose phosphate in the pentose phosphate pathway. it means. Genes encoding these transketolase are transaldolase, glucose-6-phosphate dehydrogenase, and 6-phosphogluconolactonase. constituting a gene and operon encoding
- the transketolase may be derived from a Corynebacterium sp. strain.
- the Corynebacterium sp. strain is Corynebacterium glutamicum ( Corynebacterium glutamicum ), Corynebacterium crudilactis ( Corynebacterium crudilactis ), Corynebacterium deserti ( Corynebacterium deserti ), Corynebacterium Corynebacterium callunae , Corynebacterium suranareeae , Corynebacterium lubricantis , Corynebacterium doosanense, Corynebacterium doosanense , Corynebacterium ipish Ens ( Corynebacterium efficiens ), Corynebacterium utereki ( Corynebacterium uterequi ), Corynebacterium stationis ( Corynebacterium stationis ), Corynebacterium stationis ( Coryne
- enhanced activity means that the expression of a gene encoding a protein, such as a desired enzyme, transcription factor, or transport protein, is newly introduced or increased, so that the expression level is increased compared to the wild-type strain or strain before modification.
- the enhancement of this activity is when the activity of the protein itself is increased compared to the activity of the protein possessed by the original microorganism through nucleotide substitution, insertion, deletion, or a combination thereof, and the expression or translation increase of the gene encoding it For example, when the overall degree of enzymatic activity in the cell is higher than that of the wild-type strain or the strain before modification, a combination thereof is also included.
- the enhancement of the activity of the transketolase may be to induce a site-specific mutation in the promoter of the gene encoding the transketolase.
- the promoter of the gene encoding the transketolase may be represented by the nucleotide sequence of SEQ ID NO: 1.
- promoter refers to a specific region of DNA that regulates transcription of a gene, including a binding site for RNA polymerase that initiates mRNA transcription of a desired gene, and generally refers to a transcription initiation point. It is located upstream based on .
- a promoter is defined as a region around the transcriptional initiation point to which RNA polymerase binds, and is generally composed of two short nucleotide sequences -10 and -35 base pairs away from the transcription initiation point. .
- the promoter mutation in the present invention is improved to have higher activity than the wild-type promoter, and by inducing mutation in the promoter region located above the transcription start point, it is possible to increase the expression of the gene located downstream.
- the enhancement of the activity of the transketolase is that one or more bases in the region of -300 to -10 are substituted forward from the transcription start point in the promoter sequence of the gene encoding the transketolase.
- the promoter mutation in the present invention is one or more bases of -300 to -10 region, preferably -250 to -50 region, -230 to -200 region, -190 to -160 region, or -90 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10 bases in the region to -60 may be continuously or non-contiguously substituted.
- the nucleotide sequence of the -83 to -74 region is substituted from ccaattaacc to tgtgctgtca, and the A Corynebacterium glutamicum mutant having a new promoter sequence was obtained.
- Such a Corynebacterium glutamicum mutant may include a mutated promoter of the tkt gene represented by the nucleotide sequence of SEQ ID NO: 2.
- the nucleotide sequence in the region of -83 to -74 in the promoter sequence of the tkt gene encoding the transketolase of the Corynebacterium glutamicum strain is substituted from ccaattaacc to tgtggtatca.
- a Corynebacterium glutamicum mutant having a new promoter sequence was obtained.
- Such a Corynebacterium glutamicum mutant may include a mutated promoter of the tkt gene represented by the nucleotide sequence of SEQ ID NO: 3.
- improved productivity means that the productivity of L-lysine is increased compared to the parent strain.
- the parent strain means a wild-type or mutant strain to be mutated, and includes a target to be directly mutated or transformed with a recombinant vector.
- the parent strain may be a wild-type Corynebacterium glutamicum strain or a strain mutated from the wild-type.
- the parent strain is a mutant strain induced in the sequence of a gene (eg, lysC, zwf and hom genes) involved in lysine production, and the Korean Culture Center of Microorganisms. It may be a Corynebacterium glutamicum strain deposited with accession number KCCM12969P on April 2, 2021 (hereinafter referred to as 'Corynebacterium glutamicum DS1 strain').
- Such a Corynebacterium glutamicum mutant with improved L-lysine-producing ability of the present invention may include a mutated promoter sequence of a transketolase-encoding gene.
- the mutant may include any one of the nucleotide sequences shown in SEQ ID NOs: 2 to 4 as the promoter sequence of the transketolase gene.
- the mutant strain shows an increased L-lysine production capacity compared to the parent strain by including a mutation in the promoter of the tkt gene encoding the transketolase, in particular, L-lysine production compared to the parent strain
- L-lysine production compared to the parent strain
- This 5% or more, specifically 5 to 40%, more specifically 10 to 30% can be increased to produce 65 to 90 g of L-lysine per 1 liter of the strain culture, preferably 70 to 80 g of L - Can produce lysine.
- the mutant can produce L-lysine in a high yield by increasing the L-lysine production by about 4% or more compared to the promoter mutant strain of the conventional tkt gene having a different mutation position.
- Corynebacterium glutamicum mutant according to an embodiment of the present invention may be implemented through a recombinant vector including a mutant in which the promoter sequence of the transketolase-encoding gene is partially substituted in the parent strain.
- “some” means not all of the base sequence or polynucleotide sequence, and may be 1 to 300, preferably 1 to 100, more preferably 1 to 50, but is limited thereto. it is not
- variant refers to a promoter variant in which one or more bases in the region of -300 to -10 in the promoter sequence of the transketolase gene involved in the biosynthesis of L-lysine are substituted.
- the mutant in which the nucleotide sequence of the -83 to -74 region in the promoter sequence of the transketolase gene is substituted with tgtgctgtca is the nucleotide sequence of SEQ ID NO: 2, and the variant substituted with tgtggtatca is SEQ ID NO: It may have a base sequence of 3.
- the term “vector” refers to an expression vector capable of expressing a target protein in a suitable host cell, and refers to a gene preparation comprising essential regulatory elements operably linked to express a gene insert.
- operably linked means that a gene requiring expression and its regulatory sequence are functionally linked to each other and linked in a way that enables gene expression
- regulatory element refers to a promoter for performing transcription, regulating transcription including any operator sequences for sequencing, sequences encoding suitable mRNA ribosome binding sites, and sequences controlling the termination of transcription and translation.
- Such vectors include, but are not limited to, plasmid vectors, cosmid vectors, bacteriophage vectors, viral vectors, and the like.
- the "recombinant vector” used in the present invention can be replicated independently of the genome of the host cell after transformation into a suitable host cell, or can be sutured into the genome itself.
- the "suitable host cell” may include a replication origin, which is a specific nucleotide sequence from which replication is initiated as a vector capable of replication.
- an appropriate vector introduction technique is selected according to the host cell, and the desired gene can be expressed in the host cell.
- vector introduction can be performed by electroporation, heat-shock, calcium phosphate (CaPO4) precipitation, calcium chloride (CaCl2) precipitation, microinjection, polyethylene glycol (PEG) method, DEAE- Dextran method, cationic liposome method, lithium acetate-DMSO method, or a combination thereof can be carried out.
- the transformed gene can be expressed in the host cell, it may be included without limitation whether it is inserted into the chromosome of the host cell or located outside the chromosome.
- the host cells include cells transfected, transformed, or infected with the recombinant vector or polynucleotide of the present invention in vivo or in vitro.
- a host cell comprising the recombinant vector of the present invention is a recombinant host cell, a recombinant cell or a recombinant microorganism.
- the recombinant vector according to the present invention may include a selection marker
- the selection marker is for selecting transformants (host cells) transformed with the vector, in the medium treated with the selection marker. Since only cells expressing the selection marker can survive, selection of transformed cells is possible.
- Representative examples of the selection marker include, but are not limited to, kanamycin, streptomycin, chloramphenicol, and the like.
- Genes inserted into the recombinant vector for transformation of the present invention can be substituted into a host cell such as a microorganism of the genus Corynebacterium due to homologous recombination crossover.
- the host cell may be a Corynebacterium sp. strain, for example, Corynebacterium glutamicum ( Corynebacterium glutamicum ) It may be a strain.
- another aspect of the present invention comprises: a) culturing the Corynebacterium glutamicum mutant in a medium; And b) provides a method for producing L- lysine comprising the step of recovering L-lysine from the culture medium of the mutant or mutant strain.
- the culture may be performed according to an appropriate medium and culture conditions known in the art, and those skilled in the art may easily adjust the medium and culture conditions for use.
- the medium may be a liquid medium, but is not limited thereto.
- the culture method may include, for example, batch culture, continuous culture, fed-batch culture, or a combination culture thereof, but is not limited thereto.
- the medium should meet the requirements of a specific strain in an appropriate manner, and may be appropriately modified by a person skilled in the art.
- the culture medium for the Corynebacterium sp. strain may refer to the known literature (Manual of Methods for General Bacteriology. American Society for Bacteriology. Washington D.C., USA, 1981), but is not limited thereto.
- the medium may include various carbon sources, nitrogen sources and trace element components.
- Carbon sources that can be used include sugars and carbohydrates such as glucose, sucrose, lactose, fructose, maltose, starch, cellulose, oils and fats such as soybean oil, sunflower oil, castor oil, coconut oil, palmitic acid, stearic acid, fatty acids such as linoleic acid, alcohols such as glycerol and ethanol, and organic acids such as acetic acid. These materials may be used individually or as a mixture, but are not limited thereto.
- Nitrogen sources that may be used include peptone, yeast extract, broth, malt extract, corn steep liquor, soybean wheat and urea or inorganic compounds such as ammonium sulfate, ammonium chloride, ammonium phosphate, ammonium carbonate and ammonium nitrate.
- the nitrogen source may also be used individually or as a mixture, but is not limited thereto.
- Sources of phosphorus that may be used include, but are not limited to, potassium dihydrogen phosphate or dipotassium hydrogen phosphate or the corresponding sodium-containing salt.
- the culture medium may contain a metal salt such as magnesium sulfate or iron sulfate necessary for growth, but is not limited thereto.
- essential growth substances such as amino acids and vitamins may be included.
- precursors suitable for the culture medium may be used. The medium or individual components may be added batchwise or continuously by an appropriate method to the culture medium during the culturing process, but is not limited thereto.
- the pH of the culture medium by adding compounds such as ammonium hydroxide, potassium hydroxide, ammonia, phosphoric acid and sulfuric acid to the microorganism culture medium in an appropriate manner during culture.
- an antifoaming agent such as fatty acid polyglycol ester during culture can suppress the formation of bubbles.
- oxygen or oxygen-containing gas eg, air
- the temperature of the culture medium may be usually 20 °C to 45 °C, for example, 25 °C to 40 °C.
- the incubation period may be continued until a useful substance is obtained in a desired production amount, for example, it may be 10 to 160 hours.
- the step of recovering L-lysine from the cultured medium and the cultured mutant strain is L-lysine produced from the medium using a suitable method known in the art according to the culture method.
- a suitable method known in the art according to the culture method.
- the biomass in the step of recovering lysine, is removed by centrifuging the culture medium at low speed, and the obtained supernatant can be separated through ion exchange chromatography.
- the step of recovering L-lysine may include a step of purifying L-lysine.
- the Corynebacterium glutamicum mutant according to the present invention can improve the production yield of L-lysine compared to the parent strain by increasing or enhancing the expression of the transketolase-encoding gene.
- FIG. 1 shows the structure of a pCGI (Ptkt83-1) vector including a mutation in which the base sequence of the -83 to -74 region of the transketolase promoter is substituted with tgtgctgtca according to an embodiment of the present invention.
- FIG. 2 shows the structure of a pCGI (Ptkt83-7) vector including a mutation in which the base sequence of the -83 to -74 region of the transketolase promoter is substituted with tgtggtatca.
- the culture solution was centrifuged at 12,000 rpm for 10 minutes to remove the supernatant, washed once with saline, and washed three more times with phosphate buffer. After suspending this in 5 ml of phosphate buffer, it was spread on a solid culture medium (CM liquid medium further containing 15 g/L of agar and 8% lysine) and cultured at 30° C. for 30 hours to form 100 colonies. separated.
- CM liquid medium further containing 15 g/L of agar and 8% lysine
- soluble cells were prepared. After inoculating 10 ml of the cultured Corynebacterium glutamicum ATCC13032 in 100 ml of BHIS medium and culturing at 30° C. overnight, inoculate 100 ml of CM liquid medium with an OD 600 of 0.3 to 120 at 18° C. It was cultured for about 28 hours until OD 600 reached 0.8 at rpm. The culture solution was centrifuged at 6000 rpm at 4° C. for 10 minutes to recover cells, suspended in 20 ml of a 10% glycerol solution, and then centrifuged three times.
- the recovered cells were again suspended in 10% glycerol solution, and 100 ⁇ l of each was dispensed into an E-tube and stored in a -70°C deep freezer until used.
- 1 ⁇ g of DNA was added to 100 ⁇ l of Corynebacterium glutamicum ATCC13032 soluble cells and added to a cooled electroporation cuvette, and electroporation was performed using a MicroPulser manufactured by Bio-Rad. .
- 1 ml of CM broth pre-warmed at 46°C was added to recover cells, incubated on ice for 2 minutes, and then incubated at 180 rpm in an incubator at 30°C.
- 100 ⁇ l was spread on a BHIS agar plate to which kanamycin (50 ⁇ g/ml) was added, and then cultured at 30° C. in an incubator.
- CAT analysis of tkt promoter region variants was measured by the Shaw method (Shaw et al., 1991. Biochemistry. 30(44):10806). Briefly, the transformed Corynebacterium glutamicum strain was cultured in a CM broth containing kanamycin (50 ⁇ g/ml), and then the cells were recovered to obtain a protein lysate.
- Ptkt83-1 and Ptkt83-7 the nucleotide sequences in the region -83 to -74 in the promoter sequence of the tkt gene encoding transketolase were substituted with tgtgctgtca and tgtggtatca, respectively. Thereafter, an experiment was performed to verify the increase in L-lysine productivity by mutation of the promoter of the tkt gene using the Corynebacterium glutamicum DS1 strain.
- Corynebacterium glutamicum mutant with enhanced transketolase activity, Corynebacterium glutamicum DS1 strain and E. coli DH5a (HIT Competent cellsTM, Cat No. RH618) were used. .
- the Corynebacterium glutamicum DS1 strain is a CM of 5 g of glucose, 2.5 g of NaCl, 5.0 g of yeast extract, 1.0 g of urea, 10.0 g of polypeptone and 5.0 g of beef extract in 1 L of distilled water. Incubated in -broth medium (pH 6.8) at a temperature of 30 °C.
- E. coli DH5a was cultured at a temperature of 37° C. on LB medium having a composition of 10.0 g of tryptone, 10.0 g of NaCl and 5.0 g of yeast extract in 1 L of distilled water.
- transketolase involved in pentose metabolism in the strain to increase lysine productivity
- enhancement of transketolase was introduced.
- the method used in this Example induced specific mutations in the promoter of the tkt gene in order to increase the expression of the tkt gene encoding the transketolase.
- a primer containing the mutant sequence was prepared, and tkt on the genome of the Corynebacterium glutamicum DS1 mutant strain selected in Example 1
- the left arm 696 bp part and the right arm 697 bp part were amplified by PCR centering on the mutated part of the gene promoter, and ligated by overlap PCR (overlap PCR), and then the recombinant vector pCGI (Reference [Kim et al., Journal of Microbiological Methods 84 (2011) 128-130]).
- This plasmid was named pCGI (Ptkt83-1) (see FIG. 1).
- the primers in Table 2 below were used to amplify each gene fragment.
- PCR was performed under the following conditions using the corresponding primers from the genomic DNA of the Corynebacterium glutamicum DS1 strain.
- a Thermocycler TP600, TAKARA BIO Inc., Japan
- each deoxynucleotide triphosphate dATP, dCTP, dGTP, dTTP
- 100 ⁇ M was added to a reaction solution containing oligonucleotides 1 pM
- Corynebacterium glutamicum Using 10 ng of chromosomal DNA of the DS1 strain as a template, 25 to 30 cycles were performed in the presence of 1 unit of pfu-X DNA polymerase mixture (Solgent, Korea).
- PCR conditions were (i) denaturation step: 94°C for 30 seconds, (ii) annealing step: 58°C for 30 seconds, and (iii) extension step: 1-2 at 72°C. It was carried out under the conditions of minutes (providing a polymerization time of 2 minutes per 1 kb).
- the thus-prepared gene fragment was cloned into a pCGI vector using BamHI, EcoRI restriction enzymes and DNA Ligation kit Ver2.1 (Takara, Japan).
- the vector was transformed into E. coli DH5a, spread on an LB-agar plate containing 50 ⁇ g/ml kanamycin, and cultured at 37° C. for 24 hours. After isolating the finally formed colony and confirming that the insert is exactly present in the vector, this vector was isolated and used for recombination of the Corynebacterium glutamicum strain.
- a Corynebacterium glutamicum mutant was prepared in the same manner as in Example 3, except that the nucleotide sequence of the promoter -83 ⁇ -74 region of the tkt gene was substituted with tgtggtatca in ccaattaacc.
- the primers shown in Table 3 were used to amplify each gene fragment to construct a plasmid, and a mutant strain DS1-Ptkt83-7 was prepared using the prepared plasmid pCGI (Ptkt83-7) vector. Finally, a Corynebacterium glutamicum mutant strain (DS1-Ptkt83-7) into which the mutated tkt gene was introduced was obtained.
- Corynebacterium glutamicum mutants DS1-Ptkt83-1 and DS1-Ptkt83-7 strains were located at specific positions (-83 to -74 region) was substituted with the optimal nucleotide sequence, so that the productivity of L-lysine was increased by about 14% and 17%, respectively, compared to the parent strain Corynebacterium glutamicum DS1 strain.
- Corynebacterium glutamicum mutant DS1-Ptkt83-1 and DS1-Ptkt83-7 strains have different mutation positions (-217 to -206 regions) and sequences (CCCTGACTACAAA) compared to the conventional mutant Ptkt217, the productivity of L-lysine It was confirmed that this increased by about 4% and 7%, respectively.
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Abstract
Description
조성 | 함량 (1 L 기준) |
Glucose | 100 g |
Ammonium sulfate | 55 g |
KH2PO4 | 1.1 g |
MgSO4ㆍH2O | 1.2 g |
MnSO4ㆍH2O | 180 mg |
FeSO4ㆍH2O | 180 mg |
ThiamineㆍHCl | 9 mg |
Biotin | 1.8 mg |
CaCO3 | 5% |
pH | 7.0 |
프라이머(primer) (5' - 3') | 서열번호 | |
Ptkt-1F | ggaattcccctgggcttcgttagcgc | 4 |
Ptkt83-1-F2 | cctttgccaaatttgaatgtgctgtcataagtcgtagatctg | 5 |
Ptkt83-1-R1 | cagatctacgacttatgacagcacattcaaatttggcaaagg | 6 |
Ptkt-R2 | gggatccctcacgacgagcagccatgg | 7 |
프라이머(primer) (5' - 3') | 서열번호 | |
Ptkt-1F | ggaattcccctgggcttcgttagcgc | 4 |
Ptkt83-7-F2 | cctttgccaaatttgaatgtggtatcataagtcgtagatctg | 8 |
Ptkt83-7-R1 | cagatctacgacttatgataccacattcaaatttggcaaagg | 9 |
Ptkt-R2 | gggatccctcacgacgagcagccatgg | 7 |
균주 | L-라이신 (g/L) |
모균주 (DS1) | 64.2 |
변이주 (Ptkt217) | 69.9 |
변이주 (DS1-Ptkt83-1) | 73.0 |
변이주 (DS1-Ptkt83-7) | 75.1 |
Claims (5)
- 트랜스케톨라아제의 활성이 강화되어 L-라이신 생산능이 향상된 코리네박테리움 글루타미쿰(Corynebacterium glutamicum) 변이주.
- 청구항 1에 있어서,상기 트랜스케톨라아제의 활성 강화는 트랜스케톨라아제를 암호화하는 유전자의 프로모터에 위치 특이적 변이를 유발하는 것인 코리네박테리움 글루타미쿰 변이주.
- 청구항 2에 있어서,상기 트랜스케톨라아제를 암호화하는 유전자는 서열번호 1의 염기서열로 표시되는 것인 코리네박테리움 글루타미쿰 변이주.
- 청구항 1에 있어서,상기 변이주는 서열번호 2 및 3으로 표시되는 염기서열 중 어느 하나를 포함하는 것인 코리네박테리움 글루타미쿰 변이주.
- a) 청구항 1의 변이주를 배지에서 배양하는 단계; 및b) 상기 변이주 또는 변이주가 배양된 배지로부터 L-라이신을 회수하는 단계를 포함하는 L-라이신의 생산 방법.
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EP21939438.4A EP4332230A1 (en) | 2021-04-30 | 2021-05-28 | Corynebacterium glutamicum variant with improved l-lysine production ability, and method for producing l-lysine using same |
BR112023022512A BR112023022512A2 (pt) | 2021-04-30 | 2021-05-28 | Promotor, variante de corynebacterium glutamicum e método para produção de l-lisina |
JP2023566852A JP2024515390A (ja) | 2021-04-30 | 2021-05-28 | L-リシン生産能が向上したコリネバクテリウム・グルタミカム変異株及びそれを用いたl-リシン生産方法 |
MX2023012873A MX2023012873A (es) | 2021-04-30 | 2021-05-28 | Variante de corynebacterium glutamicum con capacidad mejorada de producción de l-lisina y procedimiento para la producción de l-lisina mediante el uso de la misma. |
AU2021443607A AU2021443607A1 (en) | 2021-04-30 | 2021-05-28 | Corynebacterium glutamicum variant with improved l-lysine production ability, and method for producing l-lysine using same |
CA3217305A CA3217305A1 (en) | 2021-04-30 | 2021-05-28 | Corynebacterium glutamicum variant with improved l-lysine production ability, and method for producing l-lysine using same |
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KR1020210067391A KR102682180B1 (ko) | 2021-04-30 | 2021-05-26 | L-라이신 생산능이 향상된 코리네박테리움 글루타미쿰 변이주 및 이를 이용한 l-라이신의 생산 방법 |
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CN117511834A (zh) | 2024-02-06 |
KR20240000419A (ko) | 2024-01-02 |
CN115261294B (zh) | 2024-03-29 |
CA3217305A1 (en) | 2022-11-03 |
AU2021443607A1 (en) | 2023-11-16 |
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