WO2009096690A2 - 개량된 프로모터 및 이를 이용한 l-라이신의 생산 방법 - Google Patents
개량된 프로모터 및 이를 이용한 l-라이신의 생산 방법 Download PDFInfo
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- WO2009096690A2 WO2009096690A2 PCT/KR2009/000382 KR2009000382W WO2009096690A2 WO 2009096690 A2 WO2009096690 A2 WO 2009096690A2 KR 2009000382 W KR2009000382 W KR 2009000382W WO 2009096690 A2 WO2009096690 A2 WO 2009096690A2
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- Prior art keywords
- promoter
- vector
- lysine
- gene
- transformant
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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
- C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
- C12N15/52—Genes encoding for enzymes or proenzymes
-
- 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
- C12N1/00—Microorganisms, e.g. protozoa; Compositions thereof; Processes of propagating, maintaining or preserving microorganisms or compositions thereof; Processes of preparing or isolating a composition containing a microorganism; Culture media therefor
- C12N1/20—Bacteria; Culture media therefor
-
- 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
Definitions
- the present invention relates to an improved promoter and a method for producing L-lysine using the same, specifically, corynebacterium operably linked to a gene encoding diaminopimelate dehydrogenase and having promoter activity.
- Nucleic acid molecules derived from glutamicum vectors comprising such nucleic acid molecules, transformants transformed with such vectors, and methods for producing L-lysine using such transformants.
- Coryneform bacteria are traditionally the most widely used industrial microorganisms for the production of amino acids and nucleic acid-related substances, mainly L-lysine, L-threonine, L-arginine, L-threonine, And gram-positive bacteria used for producing chemicals having various uses in fields such as feeds, pharmaceuticals, and foods including amino acids such as glutamic acid and various nucleic acids, and require biotin for growth. It has a characteristic of snapping at right angles during cell division, and its low degradation activity on the generated metabolite is one of the advantages of the bacteria.
- Representative species include the genus Corynebacterium, including Corynebacterium glutamicum, and the genus Brivibacterium, including Brevibacterium flavum, Athrobacter sp., And Microbacterium sp.
- L-lysine is one of L-amino acids and is used commercially as a feed supplement for animals due to its ability to improve the quality of feed by increasing the absorption of other amino acids, and especially in human medicine as a component of injectable solutions. It is used in the pharmaceutical industry. Therefore, industrial production of lysine has become an economically important industrial process.
- a method for improving the production efficiency of lysine a method of amplifying a gene on a lysine biosynthetic pathway or modifying a promoter of the gene to increase enzymatic activity has been used.
- US Pat. No. 6,746,855 discloses a culture of corynebacteria, in which a lysE gene (lysine excretion carrier gene) is enhanced and additionally a gene selected from the group consisting of dapA gene, lysC gene, pyc gene and dapB gene is introduced.
- a method of producing L-lysine is disclosed.
- U.S. Patent No. 6,221,636 discloses a DNA sequence encoding an aspartokinase and a DNA sequence encoding a diaminopimelate decarboxylase substantially insensitive to feedback inhibition by L-lysine and L-threonine. Corynebacteria transformed with recombinant DNA comprising a is disclosed.
- Korean Patent No. 10-0345592 discloses dapA and lysC which are suppressed by L-lysine, which are released from cells, and Escherichia spp. Amplified by dapB and ddh genes, and L-lysine production method using the same It is described.
- ddh a gene encoding diaminopimelate dehydrogenase
- ddh a gene that is believed to play a key role in the lysine biosynthesis pathway
- the present inventors have improved the promoter of the ddh gene present on the Corynebacterium chromosome through base substitution and introduced the improved promoter to increase the activity of the diaminopimelate dehydrogenase enzyme than the intrinsic activity.
- the present invention was able to provide a microorganism of the genus Bacteria.
- Still another object of the present invention is to provide a vector comprising a nucleic acid molecule having the above promoter activity.
- Still another object of the present invention is to provide a transformant transformed with the vector.
- Still another object of the present invention is to provide a method for producing lysine, comprising culturing the above-described transformant.
- Nucleic acid molecules derived from Corynebacterium glutamicum operably linked to the ddh gene according to the present invention and having improved promoter activity exhibit higher promoter activity compared to the native form, resulting in diaminopimelate dehydrogenase. By increasing the enzyme activity, the lysine production efficiency of the lysine producing strain using these nucleic acid molecules can be increased.
- 1 is a diagram showing a vector pDZ for Corynebacterium chromosome insertion.
- FIG. 2 is a diagram showing a vector for corynebacterium base substitution pDZ-ddhP1.
- the invention is derived from Corynebacterium glutamicum with improved promoter activity, operably linked to a gene encoding diaminopimelate dehydrogenase, and having a nucleotide sequence of SEQ ID NO: 2. It relates to a nucleic acid molecule.
- promoter refers to a non-ready nucleic acid sequence upstream of a coding region, that is, a polymerase, that contains a binding site for a polymerase and has a transcription initiation activity to an mRNA of a promoter subgene. Refers to a DNA region for initiating transcription of a gene and is located at the 5 'region of the mRNA transcription initiation site.
- Corynebacterium glutamicum nucleic acid molecules having a promoter activity of the present invention are operably linked to genes encoding diaminopimelate dehydrogenase.
- the gene encoding diaminopimelate dehydrogenase is the ddh gene, a major gene on the biosynthetic pathway that produces lysine in bacteria of the genus Corynebacterium.
- operably linked means that the gene sequence and the promoter sequence are functionally functional so that the nucleic acid sequence having the promoter activity of the present invention initiates and mediates the transcription of a gene encoding diaminopimelate dehydrogenase. It means connected.
- the nucleic acid sequence having the promoter activity of the present invention can be operably linked to the ddh gene to regulate the transcriptional activity of the ddh gene.
- the nucleic acid sequence having the promoter activity of the present invention is a modification of the promoter of the ddh gene in Corynebacterium glutamicum, and is characterized by having a higher promoter activity than a wild type promoter. In other words, it is intended to exhibit increased enzymatic activity than the intrinsic activity of the enzyme.
- the intrinsic activity means the active state of the enzyme that the Corynebacteria genus has in its natural state.
- Methods for improving to have higher promoter activity can be readily accomplished by methods known in the art, and preferably delete, insert, non-conservative or conservative the promoter nucleic acid sequence of the Corynebacterium glutamicum ddh gene. Substitutions or variations in the sequences are induced to improve by substitution.
- Promoter nucleic acid molecules of the invention can be isolated or prepared using standard molecular biology techniques. For example, it can be separated by PCR using the appropriate primer sequence. It can also be prepared using standard synthetic techniques using automated DNA synthesizers.
- the present inventors obtain a nucleotide sequence including a promoter region of the ddh gene (NCBI accession number NCgl2528) based on the National Institute of Health's Gene Bank (NIH GenBank) (SEQ ID NO: 1), After synthesizing four primers (SEQ ID NOS: 3-6), the chromosomal DNA of Corynebacterium glutamicum KFCC10881 was used as a template, and PCR was performed using the primers to provide a promoter having a modified sequence at the main site.
- a nucleic acid molecule according to the present invention comprising (SEQ ID NO: 2) was obtained.
- the nucleic acid molecule having the Corynebacterium glutamicum promoter activity of the present invention is preferably useful as a promoter for gene expression in prokaryotic cells, in particular E. coli or Coryneform bacteria.
- the term "coryneform bacterium” in the present invention is a concept including a microorganism of the genus Corynebacterium (Corynebacterium) or Brevibacterium (Brevibacterium).
- coryneform bacterium Corynebacterium glutamicum ATCC13032, Corynebacterium thermoaminogenes amino to Ness (thermoaminogenes) FERM BP-1539, Brevibacterium Plastic boom (Brevibacterium flavum) ATCC 14067, Brevibacterium lactofermentum ( lactofermentum ) ATCC 13869 and L-amino acid producing mutants or strains prepared therefrom, for example Corynebacterium glutamicum KFCC10881, Corynebacterium glutamicum KFCC11001, preferably Corynebacterium Glutamicum KFCC 10881, but is not limited to these examples.
- the present invention relates to a vector comprising a nucleic acid molecule having the above described improved promoter activity.
- the term "vector” refers to a DNA preparation containing a nucleotide sequence of a gene operably linked to a suitable regulatory sequence to allow expression of the gene of interest in a suitable host.
- the regulatory sequence includes a promoter capable of initiating transcription, any operator sequence for regulating such transcription, a sequence encoding a suitable mRNA ribosomal binding site, and a sequence regulating termination of transcription and translation.
- the vector used in the present invention is not particularly limited as long as it is replicable in the host, and any vector known in the art may be used.
- it may be a plasmid, phage particles, or simply a potential genomic insert, preferably pACYC177 (New England Biolab, GenBank accetion # X06402), but is not limited thereto.
- pACYC177 New England Biolab, GenBank accetion # X06402
- the vector of the present invention is introduced into a host cell such that the nucleic acid molecular sequence having promoter activity in the vector causes homologous recombination with the sequence of the promoter region of the endogeneous ddh gene gene on the host cell genome and is inserted into the chromosome.
- the vector of the present invention may further include a selection marker for confirming whether the chromosome is inserted, and the selection marker selects cells transformed with the vector, that is, confirms whether the target gene is inserted.
- markers may be used that confer a selectable phenotype such as drug resistance, nutritional requirements, resistance to cytotoxic agents or expression of surface proteins. In an environment treated with a selective agent, only cells expressing a selection marker survive or exhibit different expression traits, so that transformed cells can be selected.
- it may include a lacZ gene.
- the inventors prepared a vector that can replace the promoter region of the ddh gene gene of Corynebacterium glutamicum with a mutated promoter sequence to enhance promoter activity through homologous recombination.
- the lacZ gene was amplified by PCR from genomic DNA of E. coli K12W3110, and then a number of restriction enzymes were included.
- An adapter sequence including a recognition site was inserted to prepare a vector pDZ for corynebacterium chromosome insertion (FIG. 1).
- nucleic acid molecule comprising a promoter having a modified sequence in the promoter main region of the ddh gene, prepared to have high promoter activity as described above, is inserted into an adapter region of the pDZ vector, thereby A vector pDZ-ddhP1 (FIG. 2) comprising a nucleic acid sequence was prepared.
- the present invention relates to a transformant transformed with the vector described above.
- transformation means that DNA is introduced into a host so that the DNA is replicable as an extrachromosomal factor or by chromosomal integration.
- the transformant of the present invention is characterized in that, after a vector is transformed into a host cell, the nucleic acid molecular sequence having promoter activity in the vector causes homologous recombination with the sequence of the promoter region of the endogeneous ddh gene on the host cell genome and into the chromosome. It can be inserted or retained in the form of a plasmid.
- Methods for transforming a vector of the present invention include any method for introducing nucleic acids into cells, and can be carried out by selecting appropriate standard techniques as known in the art depending on the host cell. For example, electroporation, calcium phosphate (CaPO 4 ) precipitation, calcium chloride (CaCl 2 ) precipitation, microinjection, polyethylene glycol (PEG) method, DEAE-dextran method, cationic liposome method, and Lithium acetate-DMSO method;
- the host cell it is preferable to use a host having high DNA introduction efficiency and a high expression efficiency of the introduced DNA, and all microorganisms including prokaryotic and eukaryotic may be used, preferably E. coli or coryneform bacteria, more preferably. Corynebacterium glutamicum KFCC10881 may be used.
- the transformant transformed with the vector of the present invention replaces the promoter region of the ddh gene of Corynebacterium glutamicum with a mutated promoter sequence to enhance promoter activity through homologous recombination, thereby allowing the ddh gene to replace the improved promoter.
- This has the characteristic that the enzymatic activity of diaminopimelate dehydrogenase is increased than the natural form.
- vector pDZ-ddhP1 comprising a nucleic acid molecule having a promoter activity of SEQ ID NO: 2 is transformed into Corynebacterium glutamicum KFCC10881 to reduce the promoter activity of the ddh gene.
- the transformant (KFCC-10881-ddhP1) with improved diaminopimelate dehydrogenase activity was designated CA01-0136, and as of January 18, 2008, the Korean Culture Center of Microorganisms (Hereinafter abbreviated as "KCCM”) was deposited with accession number KCCM10920P.
- the present invention relates to a method for producing lysine comprising culturing the above-described transformant.
- the enzymatic activity of the diaminopimelate dehydrogenase is increased compared to the natural form. Since diaminopimelate dehydrogenase is the most essential enzyme on the biosynthetic pathway of lysine, it is possible to increase the production efficiency of lysine by culturing the transformant of the present invention.
- Cultivation of the transformant in the present invention can be carried out according to well-known methods, conditions such as culture temperature, incubation time and pH of the medium can be appropriately adjusted.
- These known culture methods are described in Chmiel; Bioreatechnik 1. Einbowung in die Biovonstechnik (Gustav Fischer Verlag, Stuttgart, 1991), and Storhas; Bioreaktoren und periphere bamboo (Vieweg Verlag, Braunschweig / Wiesbaden, 1994).
- the culture method includes a batch culture, continuous culture and fed-batch culture, preferably a batch process or an injection batch or a repeated batch batch process (fed batch or Repeated fed batch process) may be cultured continuously, but is not limited thereto.
- the culture medium used should suitably meet the requirements of the particular strain.
- Culture media for various microorganisms are known (eg, "Manual of Methods for General Bacteriology” from American Society for Bacteriology (Washington D.C., USA, 1981)).
- Carbon sources in the medium include sugars and carbohydrates (e.g. glucose, sucrose, lactose, fructose, maltose, molasses, starch and cellulose), fats and fats (e.g. soybean oil, sunflower seed oil, peanut oil and coconut oil). ), Fatty acids such as palmitic acid, stearic acid and linoleic acid, alcohols such as glycerol and ethanol, organic acids such as acetic acid, and the like.
- sugars and carbohydrates e.g. glucose, sucrose, lactose, fructose, maltose, molasses, starch and cellulose
- fats and fats e.g. soybean oil, sunflower seed oil, peanut oil and coconut oil.
- Nitrogen sources can be nitrogen-containing organic compounds such as peptone, yeast extract, gravy, malt extract, corn steep liquor, soybean meal and urea, or inorganic compounds such as ammonium sulfate, ammonium chloride, ammonium phosphate, ammonium carbonate and nitrate Ammonium) can be used, and these materials can also be used individually or as a mixture. Potassium dihydrogen phosphate or dipotassium hydrogen phosphate or the corresponding sodium containing salts can be used as the phosphorus source.
- the culture medium may contain metal salts necessary for growth (eg, magnesium sulfate or iron sulfate), and finally, essential growth-promoting substances such as amino acids and vitamins may be used in addition to the substances mentioned above.
- Suitable precursors may further be added to the culture medium.
- the feed material may be added to the culture all at once or may be appropriately supplied during the culture.
- the pH of the culture can be adjusted by appropriate use of a basic compound (eg sodium hydroxide, potassium hydroxide or ammonia) or an acidic compound (eg phosphoric acid or sulfuric acid).
- Foaming can be controlled using antifoams such as fatty acid polyglycol esters.
- Oxygen or oxygen-containing gas mixtures, such as air, may be introduced into the culture to maintain aerobic conditions.
- Incubation temperature is usually 20 to 45 °C, preferably 25 to 40 °C. Incubation is continued until the maximum amount of L-amino acid desired is produced. For this purpose it is usually achieved in 10 to 160 hours.
- L-lysine may be excreted in culture medium or contained in cells.
- the production method of lysine comprising the step of culturing the above-described transformant of the present invention may further comprise a method for recovering the lysine produced in the culturing step.
- the method for recovering L-lysine can separate L-lysine from cells or culture medium by methods well known in the art. Examples of L-lysine recovery methods include, but are not limited to, filtration, anion exchange chromatography, crystallization, and HPLC.
- a recombinant vector for replacing the promoter of the ddh gene gene of Corynebacterium glutamicum, a lysine producing strain with an improved promoter through homologous recombination was prepared, and the vector was corynebacterium glutamicum KFCC10881.
- a strain with high lysine production efficiency was prepared.
- Corynebacterium glutamicum KFCC10881 strain used in the present invention is a S- (2-aminoethyl) cysteine (S-) produced by artificial variation using Corynebacterium glutamicum wild strain (ATCC13032) as a parent strain.
- (2-aminoethyl) cysteine hereinafter referred to as AEC
- AEC (2-aminoethyl) cysteine
- homoserine leaky homoserine leaky
- Example 1 Preparation of a recombinant vector for promoter improvement
- a vector pDZ for corynebacterium chromosome insertion was prepared using E. coli cloning vector pACYC177 (New England Biolab, GenBank accetion # X06402) as a base vector.
- the pACYC177 vector was treated with AcuI and BanI restriction enzymes and then blunt-terminated via Klenow enzyme treatment.
- the lacZ gene derived from Escherichia coli to be used as a selection marker was prepared by amplifying the genomic DNA of Escherichia coli K12 W3110 to include its own promoter through PCR, and then phosphorylating and smoothing 5 'terminal through T4 DNA polymerase and polynucleotide kinase treatment.
- the two DNA fragments prepared as described above were conjugated, and an adapter sequence containing a number of restriction enzyme recognition sites artificially synthesized into the restriction enzyme BamHI site of the conjugated cyclic DNA molecule was inserted to corynebacter.
- a vector pDZ for indium chromosome insertion was completed.
- 1 is a diagram showing a vector pDZ for Corynebacterium chromosome insertion.
- a recombinant vector was prepared to improve the promoter of the dh-producing Corynebacterium glutamicum-derived ddh gene.
- ddh A nucleotide sequence (SEQ ID NO: 1) containing a promoter region of the gene (NCBI accession number NCgl2528) was obtained, and a DNA fragment (SEQ ID NO: 2) containing a promoter having a modified sequence in the main portion was obtained.
- SEQ ID NO: 1 A nucleotide sequence containing a promoter region of the gene (NCBI accession number NCgl2528) was obtained, and a DNA fragment (SEQ ID NO: 2) containing a promoter having a modified sequence in the main portion was obtained.
- Each modified promoter sequence is designed based on promoter consensus sequences generally known in microorganisms.
- the primer for preparing the modified promoter sequence synthesized four primers (Table 1, SEQ ID NO: 3 to 6) based on the nucleotide sequence.
- PCR was performed using the chromosomal DNA of Corynebacterium glutamicum KFCC10881 as a template to obtain a promoter sequence of the ddh gene gene of Corynebacterium glutamicum, and using the oligonucleotide pairs shown in Table 1 as primers.
- the polymerase was PfuUltra TM high-trust DNA polymerase (Stratagene), and PCR conditions were denatured 96 ° C., 30 seconds; Annealing 53 ° C., 30 seconds; And 30 degreeC of the polymerization reaction 72 degreeC and 30 second was repeated. As a result, a 300 bp DNA fragment containing a substitution site at one end was obtained.
- ddhP1-1 was amplified using SEQ ID NOs: 3 and 6 as primers
- ddhP1-2 was amplified using SEQ ID NOs: 5 and 4 as primers.
- the amplified product was previously mixed with a pDZ vector prepared by digestion with XbaI restriction enzyme and cloned using an In-fusion Cloning Kit (TAKARA) to obtain a pDZ-ddhP1 vector.
- TAKARA In-fusion Cloning Kit
- FIG. 2 is a diagram showing a Corynebacterium chromosome substitution vector pDZ-ddhP1 containing ddhP1 corresponding to SEQ ID NO: 2.
- the recombinant vector prepared above was transformed into Corynebacterium glutamicum KFCC-10881, a lysine producing strain, and the promoter sequence of the strain chromosome. And by replacing homologous recombination of the promoter sequence on the vector, the improved promoter sequence was inserted into the chromosome.
- Corynebacterium glutamicum KFCC10881 using Corynebacterium chromosome substitution vector pDZ-ddhP1, which is a recombinant vector containing a DNA fragment having a recombinant vector improved promoter sequence prepared in Example 1 above.
- pDZ-ddhP1 Corynebacterium chromosome substitution vector pDZ-ddhP1
- chromosomal insertion of the vector was made possible by checking whether it was blue in solid media, including X-gal (5-bromo-4-chloro-3-indolyl- ⁇ -D-galactosid).
- the primary chromosome-inserted strains were shaken in nutrient medium (30 ° C., 8 hours), diluted from 10 ⁇ 4 to 10 ⁇ 10 , respectively, and plated on solid medium containing X-gal. While most colonies are blue, white colonies appearing at a low rate, and thus, strains in which the nucleotide sequence is substituted in the major region of the promoter of the ddh gene are selected by secondary crossover.
- the strains selected as described above were finally selected through a process of confirming base substitution through PCR and a sequence sequence of a corresponding region.
- Promoter base substitution of the strain transformed with the pDZ-ddhP1 vector was confirmed by sequencing the target site by performing PCR using SEQ ID NOs: 4 and 7 as primers.
- Diaminopimelate Dehydrogenase Enzyme Activity of Corynebacterium glutamicum KFCC10881 Strains Used as Parent Strains and Corynebacterium glutamicum KFCC10881-ddhP1 Strains In order to determine the cultivation in the following manner, the protein was separated from the culture solution to determine the diaminopimelate dehydrogenase activity.
- Cultures cultured up to the log phase were inoculated in 50 ml of the following species medium (I) such that the OD 600 value was 0.3, and then cultured until the OD 600 value reached about 15.
- the cells were collected from the culture by centrifugation (5,000 rpm, 15 minutes), washed twice with 20 mM Tris.HCl (pH8.0) buffer, and then suspended in a buffer solution of about 160 to 610 nm turbidity. It was. After adding 1.25 g of glass beads per 1.5 ml of the suspension, the cells were crushed for 6 minutes using a bead beater.
- the supernatant was collected by centrifugation (15,000 rpm, 20 minutes) and the protein concentration was quantified by the Bradford method (Bradford, MM 1976. Anal. Biochem. 72: 248-254), followed by diaminopimelate dehydro It was used as a crude protein solution for the determination of genease enzyme activity.
- the diaminopimelate dehydrogenase enzyme activity was measured by using a reaction solution containing 0.2 M Glycine / NaOH (pH10.5), 2 mM NADP, 4 mM meso-diaminopimelate and about 0.01. After the reaction was initiated by mixing ml of crude protein solution to a total volume of 1 ml, the reaction was continuously measured at 340 nm wavelength while reacting at 25 degrees for 10 minutes. Diaminopimelate dehydrogenase enzyme active unit (U) was defined as NADPH ⁇ mole reduced by 1 mg of protein for 1 minute.
- Corynebacterium glutamicum KFCC10881-ddhP1 strain was found to show a 23.2 fold increase in diaminopimelate dehydrogenase activity compared to parent strain KFCC10881 (Table 2).
- Glucose 20 g Polypeptone 10 g, Yeast extract 5 g, (NH 4 ) 2 SO 4 5 g, Urea 1.5 g, KH 2 PO 4 4 g, K 2 HPO 4 8 g, MgSO 4 7H 2 O 0.5 g, 150 ⁇ g biotin, 1500 ⁇ g thiamine HCl, 3000 ⁇ g calcium-pantothenic acid, 3000 ⁇ g nicotinamide (based on 1 liter of distilled water)
- 250 ml corner-baffle flasks containing 25 ml of the following species medium (II) were inoculated with the strains of Corynebacterium glutamicum strains KFCC-10881 and KFCC10881-ddhP1 and shake incubated at 200 rpm for 20 hours at 30 ° C. It was.
- a 250 ml corner-baffle flask containing 24 ml of the following production medium was inoculated with 1 ml of seed culture and shaken at 30 ° C. for 120 hours (200 rpm).
- Corynebacterium glutamicum-derived nucleic acid molecules with improved promoter activity according to the present invention exhibit higher promoter activity compared to the native form, thereby increasing the enzymatic activity of diaminopimelate dehydrogenase to improve the biosynthetic efficiency of lysine.
- L-lysine a kind of L-amino acid useful for industry, can be produced in high yield.
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Abstract
Description
프라이머 | 염기서열 | 서열번호 |
ddh/PF | CCG GGG ATC CTC TAG AGT GCG TGG CGA GTT TTA CAA AG | 3 |
ddh/PR | GCA GGT CGA CTC TAG AGG CGA ACT GCG CGA ACT TTG G | 4 |
ddh/P1F | TAT GCA TTG TGG TAA GCT CG | 5 |
ddh/P1R | CGA GCT TAC CAC AAT GCA TA | 6 |
ddh/P1mut | CTA AGT ATG CAT TGT | 7 |
균주 | 디아미노피멜레이트 디히드로게나제 (U) | Folds |
KFCC10881 | 25.2 | 1 |
KFCC10881-ddhP1 | 584.5 | 23.2 |
균주 | 라이신(g/l) | ||
뱃치 1 | 뱃치 2 | 뱃치 3 | |
KFCC10881 | 43.2 | 42.5 | 42.5 |
KFCC10881-ddhP1 | 44.2 | 44.2 | 44.1 |
Claims (9)
- 디아미노피멜레이트 디히드로게나제를 암호화하는 유전자와 작동가능하게 연결되고, 서열번호 2의 뉴클레오타이드 서열을 가지는, 개량된 프로모터 활성을 갖는 핵산 분자.
- 제1항의 개량된 프로모터 활성을 갖는 핵산 분자를 포함하는 벡터.
- 제2항에 있어서, 상기 벡터는 도 2에 나타낸 pDZ-ddhP1인 벡터.
- 제2항의 벡터로 형질전환된 형질전환체.
- 제4항에 있어서, 상기 형질전환체는 코리네박테리움 속 또는 브레비박테리움 속인 형질전환체.
- 제4항에 있어서. CA01-0136로 명명된 수탁번호 KCCM10920P인 형질전환체.
- 제4항에 있어서, 제1항의 개량된 프로모터 활성을 갖는 핵산 분자가 염색체 내에 상동 재조합으로 삽입되는 것을 특징으로 하는 형질전환체.
- 제4항에 있어서, 제1항의 개량된 프로모터 활성을 갖는 핵산 분자를 플라스미드 형태로 보유하고 있는 것을 특징으로 하는 형질전환체.
- 제4항의 형질전환체를 배양하는 단계를 포함하는 라이신의 생산 방법.
Priority Applications (12)
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US12/864,979 US8535915B2 (en) | 2008-01-31 | 2009-01-23 | Promoter, and a production method for L-lysine using the same |
BRPI0906584-9A BRPI0906584B1 (pt) | 2008-01-31 | 2009-01-23 | promotor aprimorado e método para a produção de l-lisina usando o mesmo |
LTEP09705987.7T LT2236610T (lt) | 2008-01-31 | 2009-01-23 | Patobulintas promotorius ir jo panaudojimas l-lizino gamybos būdui |
PL15184909T PL2993233T3 (pl) | 2008-01-31 | 2009-01-23 | Ulepszony promotor oraz sposób wytwarzania L-lizyny przy jego zastosowaniu |
EP15184909.8A EP2993233B1 (en) | 2008-01-31 | 2009-01-23 | Improved promoter, and a production method for l-lysine using the same |
CN201210322618.0A CN103555721B (zh) | 2008-01-31 | 2009-01-23 | 改进的启动子和用其产生l-赖氨酸的方法 |
CN2009801033156A CN101939432B (zh) | 2008-01-31 | 2009-01-23 | 改进的启动子和用其产生l-赖氨酸的方法 |
JP2010544884A JP5400065B2 (ja) | 2008-01-31 | 2009-01-23 | 改良されたプロモーターおよびこれを用いたl−リシンの生産方法 |
DK09705987.7T DK2236610T3 (en) | 2008-01-31 | 2009-01-23 | Promoter and improved method for producing L-lysine using the same |
EP09705987.7A EP2236610B1 (en) | 2008-01-31 | 2009-01-23 | Improved promoter, and a production method for l-lysine using the same |
ES09705987.7T ES2597877T3 (es) | 2008-01-31 | 2009-01-23 | Promotor mejorado y método para la producción de L-lisina mediante el uso del mismo |
HRP20161224TT HRP20161224T1 (hr) | 2008-01-31 | 2016-09-26 | Poboljšani promotor, i postupak proizvodnje l-lizina uporabom istog |
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KR1020080010073A KR100987281B1 (ko) | 2008-01-31 | 2008-01-31 | 개량된 프로모터 및 이를 이용한 l-라이신의 생산 방법 |
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US (1) | US8535915B2 (ko) |
EP (3) | EP2990488A1 (ko) |
JP (1) | JP5400065B2 (ko) |
KR (1) | KR100987281B1 (ko) |
CN (2) | CN103555721B (ko) |
BR (1) | BRPI0906584B1 (ko) |
DK (2) | DK2236610T3 (ko) |
ES (2) | ES2743422T3 (ko) |
HR (1) | HRP20161224T1 (ko) |
HU (2) | HUE030771T2 (ko) |
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JP2011182779A (ja) * | 2010-03-05 | 2011-09-22 | Cj Cheiljedang Corp | 改良されたプローモーターおよびそれを用いたl−リシンの生産方法 |
WO2013081296A1 (ko) | 2011-12-01 | 2013-06-06 | 씨제이제일제당 (주) | L-아미노산 및 리보플라빈을 동시에 생산하는 미생물 및 이를 이용한 l-아미노산 및 리보플라빈을 생산하는 방법 |
JP2013529073A (ja) * | 2010-05-03 | 2013-07-18 | フォルシャングスツェントラム ユーリッヒ ゲーエムベーハー | 細胞内代謝産物の検出のためのセンサー |
WO2019022375A1 (ko) * | 2017-07-24 | 2019-01-31 | 씨제이제일제당(주) | L-라이신을 생산하는 미생물 및 이를 이용한 l-라이신의 생산 방법 |
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KR100987281B1 (ko) * | 2008-01-31 | 2010-10-12 | 씨제이제일제당 (주) | 개량된 프로모터 및 이를 이용한 l-라이신의 생산 방법 |
EP2796555B1 (en) | 2011-12-21 | 2018-08-29 | Cj Cheiljedang Corporation | Method for producing l-lysine using microorganisms having ability to produce l-lysine |
KR20140066553A (ko) | 2012-11-23 | 2014-06-02 | 삼성전자주식회사 | 코리네박테리움 속 균주의 신규 프로모터 |
KR101793328B1 (ko) * | 2015-07-03 | 2017-11-03 | 씨제이제일제당 (주) | L-라이신 생산능을 갖는 미생물 및 이를 이용한 l-라이신 생산 방법 |
CN106190997B (zh) * | 2016-07-20 | 2024-09-17 | 清华大学 | 一种nadh依赖性的二氨基庚二酸脱氢酶及其应用 |
DK3508580T3 (da) * | 2016-08-31 | 2022-03-07 | Cj Cheiljedang Corp | Ny promotor og anvendelse deraf |
CN113201536B (zh) * | 2020-08-19 | 2022-09-13 | 中国科学院天津工业生物技术研究所 | 具有启动子活性的多核苷酸及其在生产氨基酸中的应用 |
WO2022265130A1 (ko) * | 2021-06-15 | 2022-12-22 | 씨제이제일제당 (주) | 신규 프로모터 및 이의 용도 |
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JP2011182779A (ja) * | 2010-03-05 | 2011-09-22 | Cj Cheiljedang Corp | 改良されたプローモーターおよびそれを用いたl−リシンの生産方法 |
EP2371947A1 (en) * | 2010-03-05 | 2011-10-05 | CJ CheilJedang Corporation | Enhanced promoter and method for producing L-lysine usinge the same |
US8329434B2 (en) | 2010-03-05 | 2012-12-11 | Cj Cheiljedang Corporation | Enhanced promoter and method for producing L-lysine using the same |
JP2013529073A (ja) * | 2010-05-03 | 2013-07-18 | フォルシャングスツェントラム ユーリッヒ ゲーエムベーハー | 細胞内代謝産物の検出のためのセンサー |
WO2013081296A1 (ko) | 2011-12-01 | 2013-06-06 | 씨제이제일제당 (주) | L-아미노산 및 리보플라빈을 동시에 생산하는 미생물 및 이를 이용한 l-아미노산 및 리보플라빈을 생산하는 방법 |
WO2019022375A1 (ko) * | 2017-07-24 | 2019-01-31 | 씨제이제일제당(주) | L-라이신을 생산하는 미생물 및 이를 이용한 l-라이신의 생산 방법 |
Also Published As
Publication number | Publication date |
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EP2990488A1 (en) | 2016-03-02 |
HUE044749T2 (hu) | 2019-11-28 |
EP2236610A4 (en) | 2011-03-16 |
CN101939432B (zh) | 2013-02-13 |
ES2597877T3 (es) | 2017-01-23 |
CN103555721B (zh) | 2025-04-08 |
ES2743422T3 (es) | 2020-02-19 |
LT2236610T (lt) | 2016-10-25 |
EP2236610B1 (en) | 2016-07-20 |
US20110076731A1 (en) | 2011-03-31 |
BRPI0906584A2 (pt) | 2019-10-01 |
HUE030771T2 (en) | 2017-05-29 |
PL2993233T3 (pl) | 2019-11-29 |
DK2236610T3 (en) | 2016-11-14 |
HRP20161224T1 (hr) | 2016-12-02 |
JP5400065B2 (ja) | 2014-01-29 |
JP2011510651A (ja) | 2011-04-07 |
US8535915B2 (en) | 2013-09-17 |
EP2993233A1 (en) | 2016-03-09 |
KR100987281B1 (ko) | 2010-10-12 |
BRPI0906584B1 (pt) | 2020-12-01 |
CN103555721A (zh) | 2014-02-05 |
PL2236610T3 (pl) | 2017-01-31 |
CN101939432A (zh) | 2011-01-05 |
KR20090084099A (ko) | 2009-08-05 |
EP2236610A2 (en) | 2010-10-06 |
EP2993233B1 (en) | 2019-06-19 |
WO2009096690A3 (ko) | 2009-10-29 |
DK2993233T3 (da) | 2019-08-19 |
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