WO2022239942A1 - 신규 프로모터 및 이의 용도 - Google Patents
신규 프로모터 및 이의 용도 Download PDFInfo
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- WO2022239942A1 WO2022239942A1 PCT/KR2022/002984 KR2022002984W WO2022239942A1 WO 2022239942 A1 WO2022239942 A1 WO 2022239942A1 KR 2022002984 W KR2022002984 W KR 2022002984W WO 2022239942 A1 WO2022239942 A1 WO 2022239942A1
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- WIPO (PCT)
- Prior art keywords
- polynucleotide
- nucleotide
- gdh
- promoter
- seq
- Prior art date
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- 235000000346 sugar Nutrition 0.000 description 1
- 150000005846 sugar alcohols Chemical class 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 239000000375 suspending agent Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010361 transduction Methods 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000000844 transformation Methods 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 241001515965 unidentified phage Species 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000004474 valine Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 239000000080 wetting agent Substances 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- 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
- 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
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/0004—Oxidoreductases (1.)
- C12N9/0012—Oxidoreductases (1.) acting on nitrogen containing compounds as donors (1.4, 1.5, 1.6, 1.7)
- C12N9/0014—Oxidoreductases (1.) acting on nitrogen containing compounds as donors (1.4, 1.5, 1.6, 1.7) acting on the CH-NH2 group of donors (1.4)
- C12N9/0016—Oxidoreductases (1.) acting on nitrogen containing compounds as donors (1.4, 1.5, 1.6, 1.7) acting on the CH-NH2 group of donors (1.4) with NAD or NADP as acceptor (1.4.1)
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- 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
- C12P13/06—Alanine; Leucine; Isoleucine; Serine; Homoserine
-
- 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
- C40—COMBINATORIAL TECHNOLOGY
- C40B—COMBINATORIAL CHEMISTRY; LIBRARIES, e.g. CHEMICAL LIBRARIES
- C40B40/00—Libraries per se, e.g. arrays, mixtures
- C40B40/04—Libraries containing only organic compounds
- C40B40/06—Libraries containing nucleotides or polynucleotides, or derivatives thereof
-
- 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
- C12N2800/00—Nucleic acids vectors
- C12N2800/60—Vectors containing traps for, e.g. exons, promoters
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N2830/00—Vector systems having a special element relevant for transcription
- C12N2830/34—Vector systems having a special element relevant for transcription being a transcription initiation element
-
- 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
- C12Y—ENZYMES
- C12Y104/00—Oxidoreductases acting on the CH-NH2 group of donors (1.4)
- C12Y104/01—Oxidoreductases acting on the CH-NH2 group of donors (1.4) with NAD+ or NADP+ as acceptor (1.4.1)
- C12Y104/01003—Glutamate dehydrogenase (NAD(P)+)(1.4.1.3)
Definitions
- the present application relates to a novel promoter and a method for producing a target substance using the same, and more particularly, to a novel polynucleotide having promoter activity, a vector and a microorganism of the genus Corynebacterium containing the same, and production of a target substance using the microorganism It relates to methods and uses of promoters.
- target substances eg, amino acids
- microorganisms of the genus Corynebacterium sp., particularly Corynebacterium glutamicum are Gram-positive microorganisms that are widely used in the production of L-amino acids and other useful substances.
- various studies are being conducted to develop highly efficient producing microorganisms and fermentation process technology.
- L-lysine a representative material produced by microorganisms of the genus Corynebacterium, is used in animal feed, human medicine and cosmetics industries, and is produced by fermentation using Corynebacterium strains. Microorganisms with enhanced L-lysine biosynthesis-related genes and methods for producing L-lysine using the same are known (KR 10-0924065B1).
- L-threonine is a kind of essential amino acid and is widely used as a feed and food additive, and is also used as a synthetic raw material for infusion solutions and pharmaceuticals. Since L-threonine is low in vegetable protein and is easily deficient in animals with a vegetarian-oriented diet, it is particularly useful as an additive for animal feed. L-threonine is mainly produced by fermentation using E. coli or Corynebacterium microorganisms developed by artificial mutation or genetic recombination. Representatively, a method using a genetic recombination strain (TURBA E, et al, Agric. Biol. Chem. 53:2269-2271, 1989) and the like are known.
- O-acetyl homoserine is a material used as a precursor for methionine production and is an intermediate in the methionine biosynthetic pathway (WO2008/013432).
- O-acetyl-L-homoserine is synthesized using L-homoserine and acetyl-CoA as substrates by homoserine O-acetyl transferase.
- Isoleucine is a type of essential amino acid that is not synthesized in the body and is known to have effects such as growth promotion, nerve function enhancement, liver function enhancement and muscle strengthening, and is usually produced by a fermentation method using microorganisms.
- a system that exhibits high expression efficiency in various microorganisms that is, microorganisms belonging to the genus Escheria, microorganisms belonging to the genus Corynebacterium, or microorganisms belonging to the genus Bacillus, is still required, and thus the need for development of universal promoters is still emerging.
- a universal promoter that is not limited to a specific target substance it is expected that it can be used for the production of various substances.
- the present application has developed a novel synthetic promoter and confirmed that it has higher expression activity for lower genes when present in the forward direction compared to known promoters, thereby producing various target substances.
- One object of the present application is to provide a polynucleotide having promoter activity.
- Another object of the present application is the polynucleotide; and a vector or expression cassette comprising a gene encoding a target protein operably linked to the polynucleotide.
- Another object of the present application is the polynucleotide; Or to provide a microorganism of the genus Corynebacterium comprising the polynucleotide and a gene encoding a target protein operably linked to the polynucleotide.
- Another object of the present application is culturing the microorganisms of the genus Corynebacterium in a medium; And to provide a method for producing a target substance, comprising the step of recovering the target substance from the medium.
- Another object of the present application is to use a polynucleotide having promoter activity in which nucleotides 27, 28, 31, 32 and 36 in the polynucleotide sequence of SEQ ID NO: 1 are substituted with other nucleotides as a promoter provides
- novel polynucleotide having promoter activity of the present application can be introduced into a microorganism that produces a target substance, thereby increasing the production of the target substance. Due to the improved production yield, effects such as manufacturing cost reduction and convenience of production can be expected from an industrial point of view.
- One aspect of the present application provides a polynucleotide having promoter activity.
- the polynucleotide having promoter activity of the present application may be a polynucleotide having promoter activity comprising at least one nucleotide substitution in the polynucleotide sequence of SEQ ID NO: 1.
- polynucleotide is a DNA strand of a certain length or longer as a polymer of nucleotides in which nucleotide monomers are connected in a long chain shape by covalent bonds.
- polynucleotide having promoter activity is present near a gene to be expressed, that is, a site where transcription of a target gene including a site where RNA polymerase or an enhancer binds for the expression of the target gene. refers to a region of DNA that
- the polynucleotide having promoter activity of the present application can be used as a universal enhanced promoter.
- it can be used as a promoter that can enhance the expression of a polypeptide having glutamate dehydrogenase (gdh) activity.
- the polynucleotide may be a polynucleotide involved in increasing the production or production of a target substance, specifically, lysine, threonine, O-acetyl homoserine or isoleucine.
- polynucleotide of the present application may be included without limitation as long as it is a polynucleotide sequence having promoter activity.
- a polynucleotide having promoter activity is a promoter comprising at least 1, at least 2, at least 3, at least 4, at least 5, at least 6, or at least 7 nucleotide substitutions in the polynucleotide sequence of SEQ ID NO: 1 It may be a polynucleotide having an activity.
- polynucleotide sequence of SEQ ID NO: 1 can be cited as an example of a polynucleotide having glutamate dehydrogenase promoter activity.
- a polynucleotide in which a specific nucleotide is substituted in the polynucleotide sequence of SEQ ID NO: 1 may also be a polynucleotide having glutamate dehydrogenase promoter activity.
- the polynucleotide sequence of SEQ ID NO: 1 may be a representative polynucleotide sequence for indicating a mutation site, and other polynucleotide sequences corresponding to it having promoter activity are also included in sequences capable of introducing mutations.
- any polynucleotide sequence capable of serving as a promoter of glutamate dehydrogenase (gdh) or a polypeptide having an activity corresponding thereto may be included without limitation in the range of sequences capable of introducing mutations of the present application.
- the nucleotide sequence of SEQ ID NO: 1 can be confirmed in NCBI Genbank, a known database, and the sequence corresponding to SEQ ID NO: 1 as a sequence capable of serving as a promoter of the glutamate dehydrogenase is Corynebacterium ( Corynebacterium sp.), specifically Corynebacterium glutamicum ( Corynebacterium glutamicum ) It may be a sequence, but a sequence having the same activity as or higher than the polynucleotide may be included in the promoter of the present application without limitation. can
- the polynucleotide having promoter activity provided in the present application may be one in which a nucleotide at a specific position is substituted in an existing polynucleotide sequence having promoter activity to enhance promoter activity.
- the polynucleotide having promoter activity of the present application may include a polynucleotide having promoter activity in which one or more nucleotides of the nucleotide sequence of SEQ ID NO: 1 are substituted with other nucleotides.
- it may be composed of a polynucleotide having promoter activity in which one or more nucleotides of the nucleotide sequence of SEQ ID NO: 1 are substituted with other nucleotides.
- a polynucleotide having the promoter activity may be used interchangeably with a "mutant promoter" herein.
- the mutant promoter comprises substitution of any one or more nucleotides selected from the group consisting of nucleotides 27, 28, 31, 32 and 36 of SEQ ID NO: 1 with another nucleotide, a promoter It may be a polynucleotide having an activity. Specifically, the mutant promoter may be substituted with other nucleotides at any one or more, two or more, three or more, four or more, or all five positions or their corresponding positions at the above positions. In addition, nucleotides may be additionally substituted at positions 66 and/or 261.
- the 'other nucleotide' is not limited as long as it is different from the nucleotide before substitution.
- adenine (A) the 27th nucleotide of SEQ ID NO: 1 as an example, if "the 27th nucleotide in SEQ ID NO: 1 is substituted with another nucleotide", cytosine (C), thymine (T), guanine excluding adenine (G) means to be substituted.
- cytosine (C) cytosine
- T thymine
- G guanine excluding adenine
- a nucleotide even if not indicated otherwise, when a nucleotide is described as "substituted” in this application, it means that it is substituted with a nucleotide different from the nucleotide before substitution.
- nucleotides 27, 28, 31, 32, 36, 66, and 261 of SEQ ID NO: 1 of the present application can find positions corresponding to nucleotides 27, 28, 31, 32, 36, 66, and 261 of SEQ ID NO: 1 of the present application in any polynucleotide sequence through sequence alignment known in the art. It is possible to identify the nucleotide of, and even if not separately described in this application, if "nucleotide at a specific position in a specific sequence number" is described, it means to include "nucleotide at a corresponding position" in any polynucleotide sequence is self-explanatory.
- any polynucleotide sequence having promoter activity a group consisting of nucleotides at positions corresponding to positions 27, 28, 31, 32, 36, 66, and 261 of the polynucleotide sequence of SEQ ID NO: 1
- Polynucleotide sequences in which any one or more nucleotides selected from are substituted with other nucleotides are also included in the scope of the present application.
- the polynucleotide having promoter activity in the present application is selected from the group consisting of nucleotides 27, 28, 31, 32, 36, 66, and 261 in the polynucleotide sequence of SEQ ID NO: 1 Any one or more nucleotides may be substituted with other nucleotides.
- nucleotides 27, 28, 31, 32, and 36 in the polynucleotide sequence of SEQ ID NO: 1 are substituted with other nucleotides, or nucleotides 27, 28, and 31
- Nucleotides 32, 36, 66, and 261 may be substituted with other nucleotides, or nucleotides 27, 28, 31, 32, 36, and 66 may be substituted with other nucleotides, Not limited to this.
- the polynucleotide having promoter activity of the present application may be one in which nucleotides 27, 28, 31, 32, and 36 in the polynucleotide sequence of SEQ ID NO: 1 are substituted with other nucleotides. Additionally, it may be a polynucleotide having promoter activity in which nucleotides 66 and 261 are substituted with other nucleotides or nucleotide 66 is substituted with another nucleotide.
- adenine (A), nucleotide 27, is converted to thymine (T), and cytosine (C), nucleotide 28, is converted to guanine (G).
- Cytosine (C) at nucleotide 31 is substituted with guanine (G)
- cytosine (C) at nucleotide 32 is substituted with thymine (T)
- adenine (A) at nucleotide 36 is substituted with cytosine (C);
- adenine (A) at nucleotide 27 is thymine (T)
- cytosine (C) at nucleotide 28 is guanine (G)
- cytosine (C) at nucleotide 31 is guanine (G )
- cytosine (C) at nucleotide 32 becomes thymine (T)
- nucleotide 36 adenine (A) becomes cytosine (C)
- nucleotide 66 cytosine (C) becomes thymine (T)
- the polynucleotide having promoter activity may include or (essentially) consist of the polynucleotide sequence of SEQ ID NO: 2, 3 or 4.
- a polynucleotide having promoter activity is at least 70%, 80%, 85%, 90%, 95%, 96%, 97%, 98%, or 99% or more identical to SEQ ID NO: 2, 3, or 4. It may be a polynucleotide sequence having homology or identity.
- a nucleotide sequence having homology or identity may be a sequence having less than 100% identity or excluding sequences having 100% identity among the above categories.
- a meaningless sequence is added to the inside or end of the nucleotide sequence of the corresponding sequence number, or a polynucleotide in which some sequence inside or at the end of the nucleotide sequence of the corresponding sequence number is deleted It is obvious that also falls within the scope of the present application.
- Homology and identity mean the extent to which two given base sequences are related and can be expressed as a percentage.
- Sequence homology or identity of conserved polynucleotides is determined by standard alignment algorithms, together with default gap penalties established by the program used. Substantially homologous or identical sequences are usually present under moderate or high stringency conditions along at least about 50%, 60%, 70%, 80% or 90% of the entire or full-length sequence. It can hybridize under stringent conditions. Hybridization is also contemplated for polynucleotides that contain degenerate codons in lieu of codons in the polynucleotide.
- Whether any two polynucleotide sequences have homology, similarity or identity can be determined, for example, by Pearson et al (1988) [Proc. Natl. Acad. Sci. USA 85]: can be determined using known computer algorithms such as the “FASTA” program using default parameters as in 2444. or, as performed in the Needleman program of the EMBOSS package (EMBOSS: The European Molecular Biology Open Software Suite, Rice et al., 2000, Trends Genet. 16: 276-277) (version 5.0.0 or later), It can be determined using the Needleman-Wunsch algorithm (Needleman and Wunsch, 1970, J. Mol. Biol. 48: 443-453).
- GCG program package (Devereux, J., et al, Nucleic Acids Research 12: 387 (1984)), BLASTP, BLASTN, FASTA (Atschul, [S.] [F.,] [ET AL, J MOLEC BIOL 215] : 403 (1990);Guide to Huge Computers, Martin J. Bishop, [ED.,] Academic Press, San Diego, 1994, and [CARILLO ETA/.] (1988) SIAM J Applied Math 48: 1073) Homology, similarity or identity can be determined using, for example, BLAST of the National Center for Biotechnology Information Database, or ClustalW.
- GAP program defines the total number of symbols in the shorter of the two sequences divided by the number of similarly aligned symbols (i.e., nucleotides or amino acids).
- the default parameters for the GAP program are (1) a binary comparison matrix (containing values of 1 for identity and 0 for non-identity) and Schwartz and Dayhoff, eds., Atlas Of Protein Sequence And Structure, National Biomedical Research Foundation , pp.
- a probe that can be prepared from a known gene sequence for example, a polynucleotide sequence that hybridizes under stringent conditions with a complementary sequence to all or part of the above-described polynucleotide sequence and has the same activity, may be included without limitation.
- the "stringent condition” means a condition that allows specific hybridization between polynucleotides. These conditions are described in the literature (e.g., J. Sambrook et al., Molecular Cloning, A Laboratory Manual, 2nd Edition, Cold Spring Harbor Laboratory press, Cold Spring Harbor, New York, 1989; F.M. Ausubel et al., Current Protocols in Molecular Biology , John Wiley & Sons, Inc., New York).
- genes with high homology or identity 40% or more, specifically 70% or more, 80% or more, 85% or more, 90% or more, more specifically 95% or more, More specifically, genes having homology or identity of 97% or more, particularly specifically, 99% or more hybridize, and genes having lower homology or identity than that do not hybridize, or normal Southern hybridization (southern hybridization) hybridization) washing conditions of 60 ° C, 1XSSC, 0.1% SDS, specifically 60 ° C, 0.1XSSC, 0.1% SDS, more specifically 68 ° C, 0.1XSSC, 0.1% SDS At a salt concentration and temperature corresponding to, Conditions for washing once, specifically two to three times, can be enumerated.
- Hybridization requires that two nucleic acids have complementary sequences, although mismatches between bases are possible depending on the stringency of hybridization.
- complementary is used to describe the relationship between nucleotide bases that are capable of hybridizing to each other. For example, with respect to DNA, adenine is complementary to thymine and cytosine is complementary to guanine.
- the present application may also include isolated nucleic acid fragments complementary to substantially similar nucleic acid sequences as well as the entire sequence.
- polynucleotides having homology or identity can be detected using hybridization conditions including a hybridization step at a Tm value of 55° C. and using the above-described conditions.
- the Tm value may be 60 ° C, 63 ° C, or 65 ° C, but is not limited thereto and may be appropriately adjusted by those skilled in the art according to the purpose.
- Appropriate stringency for hybridizing polynucleotides depends on the length of the polynucleotide and the degree of complementarity, parameters well known in the art (see Sambrook et al., supra, 9.50-9.51, 11.7-11.8).
- a polynucleotide having promoter activity of the present application can be used as a promoter.
- the promoter may be located at the 5' site of the initiation site of transcription into mRNA.
- the promoter may have increased promoter activity compared to conventional promoters. That is, it is possible to increase the expression and/or activity of a protein encoded by the gene of interest as well as the expression of the gene of interest in the host cell.
- the gene of interest for enhancing expression may be changed depending on the product to be produced, and the promoter may be used as a universal promoter for enhancing the gene of interest.
- target gene for the purpose of the present application, means a gene whose expression is to be controlled by the promoter sequence of the present application.
- a protein encoded by the target gene may be referred to as “target protein”, and a gene encoding the "target protein” may be referred to as “target gene”.
- a polynucleotide encoding a protein of interest can be varied in the coding region within a range that does not change the polypeptide sequence due to codon degeneracy or in consideration of codons preferred in organisms in which the polynucleotide is to be expressed. Transformations can be made. Description of the polynucleotide sequence is as described above.
- the target protein may be a polypeptide having glutamate dehydrogenase (gdh) activity. That is, the target gene of the promoter may be a gene encoding a polypeptide having glutamate dehydrogenase (gdh) activity.
- glutamate dehydrogenase (gdh)
- glutamate dehydrogenase may also be referred to as “glutamate dehydrogenase” and the like, and the glutamate dehydrogenase is involved in the metabolism of glutamate into 2-oxoglutarate, It is possible to obtain an effect of improving the productivity of useful substances such as lysine, threonine, O-acetyl homoserine, and isoleucine through the regulation of their activity.
- genes encoding glutamate dehydrogenase may include, but are not limited to, the gdh gene (NCgl1999) of Corynebacterium glutamicum ATCC13032. Those skilled in the art can easily obtain gene information encoding glutamate dehydrogenase from known databases (GenBank, etc.).
- amino acid sequence constituting the glutamate dehydrogenase can be obtained from GenBank of NCBI, a known database. For example, it may be derived from Corynebacterium glutamicum.
- polypeptide having glutamate dehydrogenase activity includes not only the wild type, non-mutated type or natural type of the glutamate dehydrogenase, but also variants having the same activity or enhanced activity.
- variable polypeptide has the same meaning as “variant”, and one or more amino acids in the sequence listed above in conservative substitution and / or modification (the recited sequence) It is different from, but refers to a protein that retains the functions or properties of the protein.
- a variant differs from an identified sequence by several amino acid substitutions, deletions or additions. Such variants can generally be identified by modifying one or more amino acids in the amino acid sequence of the protein and evaluating the properties of the modified protein. That is, the ability of the mutant can be increased compared to the original protein (native protein). In addition, some variants may include variants in which one or more portions such as an N-terminal leader sequence or a transmembrane domain are removed.
- variant may include terms such as variant, modification, mutated protein, mutation (in English, modification, modified protein, modified polypeptide, mutant, mutein, divergent, variant, etc.) The terms used are not limited thereto.
- the variant may be one in which the activity of the mutated protein is increased compared to the natural wild-type or unmodified protein, but is not limited thereto.
- conservative substitution means the substitution of one amino acid with another amino acid having similar structural and/or chemical properties. Such variants may have, for example, one or more conservative substitutions while still retaining one or more biological activities. Such amino acid substitutions can generally occur based on similarities in polarity, charge, solubility, hydrophobicity, hydrophilicity and/or amphipathic nature of the residues.
- Variants may also include deletions or additions of amino acids that have minimal impact on the secondary structure and properties of the polypeptide.
- a polypeptide may be conjugated with a signal (or leader) sequence at the N-terminus of a protein that is involved in protein transfer either co-translationally or post-translationally.
- the polypeptide may also be conjugated with other sequences or linkers to allow identification, purification, or synthesis of the polypeptide.
- a gene encoding a polypeptide having glutamate dehydrogenase activity of the present application may be referred to as a "gdh gene”.
- the gene may be derived from a microorganism of the genus Corynebacterium, specifically derived from Corynebacterium glutamicum.
- the "gdh gene” that is, a polynucleotide encoding a polypeptide having glutamate dehydrogenase activity, is a polynucleotide of a polypeptide due to codon degeneracy or considering a preferred codon in an organism to express the polypeptide.
- Various modifications may be made to the coding region within the range of not changing the amino acid sequence.
- Polypeptides having glutamate dehydrogenase activity of the present application also include variant sequences, and specifically, may also include protein variants mutated to exhibit enhanced activity of glutamate dehydrogenase.
- composition for gene expression comprising the polynucleotide having promoter activity of the present application.
- the gene expression composition means a composition capable of expressing a gene that can be expressed by a polynucleotide having promoter activity of the present application.
- composition for gene expression includes the polynucleotide having promoter activity of the present application, and may further include a component capable of operating the polynucleotide as a promoter without limitation.
- the polynucleotide may be in a form contained in a vector so as to express the operably linked gene in the introduced host cell.
- Another aspect of the present application includes an expression cassette including the polynucleotide having the promoter activity, the polynucleotide and a gene encoding a target protein.
- the term "expression "cassette” refers to a unit “cassette capable of expressing the target gene” operably linked downstream of the promoter, including the polynucleotide having the promoter activity and the gene encoding the target protein. .
- the expression cassette may be operably linked to the gene encoding the target protein and the polynucleotide having the promoter activity.
- operably linked means that a polynucleotide having a promoter activity to initiate and mediate the transcription of a gene encoding a target protein of the present application and the gene sequence are functionally linked.
- the “gene” expression cassette may include a transcription termination signal, a ribosome binding site, and a translation termination signal in addition to a promoter operably linked to the target gene.
- the target protein may be a polypeptide having glutamate dehydrogenase activity.
- Another aspect of the present application includes a polynucleotide having the promoter activity, or a vector including the polynucleotide and a gene encoding a target protein.
- the target protein may be a polypeptide having glutamate dehydrogenase activity.
- vector refers to a DNA preparation containing a polynucleotide sequence encoding a protein of interest operably linked to suitable regulatory sequences to enable expression of the protein of interest in a suitable host.
- the regulatory sequence may include a polynucleotide having the promoter activity of the present application.
- the regulatory sequence may include a promoter capable of initiating transcription, an arbitrary operator sequence for regulating such transcription, a sequence encoding a suitable mRNA ribosome binding site, and a sequence regulating the termination of transcription and translation.
- the vector can replicate or function independently of the host genome and can integrate into the genome itself.
- Vectors used in the present application are not particularly limited as long as they can be expressed in host cells, and host cells can be transformed using any vector known in the art. Examples of commonly used vectors include natural or recombinant plasmids, cosmids, viruses and bacteriophages.
- pWE15, M13, ⁇ LB3, ⁇ BL4, ⁇ IXII, ⁇ ASHII, ⁇ APII, ⁇ t10, ⁇ t11, Charon4A, and Charon21A may be used as phage vectors or cosmid vectors, and pBR-based, pUC-based, and pBluescriptII-based plasmid vectors may be used.
- pGEM-based, pTZ-based, pCL-based, pET-based, etc. can be used.
- an endogenous promoter in a chromosome can be replaced with a polynucleotide having promoter activity of the present application through a vector for chromosomal insertion into a host cell.
- a vector for chromosomal insertion into a host cell For example, pECCG117, pDZ, pACYC177, pACYC184, pCL, pUC19, pBR322, pMW118, pCC1BAC, pCES208, pXMJ19 vectors, etc. may be used, but are not limited thereto.
- a vector of known technology may be used (Republic of Korea Patent Registration No. 10-09240675).
- Insertion of the polynucleotide into the chromosome may be performed by any method known in the art, for example, homologous recombination, but is not limited thereto.
- a selection marker for determining whether the chromosome is inserted may be further included.
- Selectable markers are used to select cells transformed with a vector, that is, to determine whether a target nucleic acid molecule has been inserted, and to give selectable phenotypes such as drug resistance, auxotrophy, resistance to cytotoxic agents, or expression of surface proteins. markers may be used. In an environment treated with a selective agent, only cells expressing the selectable marker survive or exhibit other expression traits, so transformed cells can be selected. For example, a wild-type polynucleotide in a chromosome can be replaced with a mutated polynucleotide through a vector for intracellular chromosomal insertion.
- the term "transformation” may mean introducing a vector containing a polynucleotide encoding a target protein into a host cell so that the target protein can be expressed in the host cell.
- the transformed polynucleotide may be inserted into and located in the chromosome of the host cell or located outside the chromosome.
- the polynucleotide encoding the target protein may include DNA and RNA encoding the target protein.
- the polynucleotide encoding the target protein may be introduced in any form as long as it can be introduced into a host cell and expressed.
- the polynucleotide encoding the target protein may be introduced into a host cell in the form of an expression cassette, which is a gene construct containing all elements required for self-expression.
- the expression cassette may include a promoter operably linked to the polynucleotide encoding the target protein, a transcription termination signal, a ribosome binding site, and a translation termination signal.
- the polynucleotide encoding the target protein may be introduced into a host cell in its own form and operably linked to a sequence required for expression in the host cell, but is not limited thereto.
- operably linked means that a promoter sequence that initiates and mediates transcription of a polynucleotide encoding a target protein of the present application and the gene sequence are functionally linked.
- the promoter may be a polynucleotide having the promoter activity of the present application.
- the method of transforming the vector of the present application includes any method of introducing a nucleic acid into a cell, and can be performed by selecting an appropriate standard technique as known in the art according to the host cell. For example, electroporation, calcium phosphate (CaPO4) precipitation, calcium chloride (CaCl2) precipitation, microinjection, polyethylene glycol (PEG) method, DEAE-dextran method, cationic liposomal method, and lithium acetate -DMSO method, etc., but is not limited thereto.
- Another aspect of the present application is a polynucleotide having promoter activity of the present application; an expression cassette including the polynucleotide and a gene encoding the target protein; Alternatively, a microorganism comprising the polynucleotide and a vector comprising a gene encoding a target protein is provided.
- microorganism includes both wild-type microorganisms and microorganisms in which genetic modification has occurred naturally or artificially, and specific mechanisms are weakened due to causes such as insertion of external genes or enhancement or weakening of the activity of endogenous genes. It is a concept that includes all microorganisms that have been enhanced or enhanced. Specifically, it may be a microorganism containing a polynucleotide having promoter activity of the present application and a target protein.
- the target protein may be a polypeptide having glutamate dehydrogenase (gdh) activity.
- Polynucleotides having promoter activity, target proteins, polypeptides having glutamate dehydrogenase (gdh) activity, vectors, and expression cassettes of the present application are as described above.
- the microorganism may be a microorganism of the genus Corynebacterium, specifically Corynebacterium glutamicum .
- the microorganism may be a microorganism expressing glutamate dehydrogenase, a microorganism expressing a polypeptide having glutamate dehydrogenase activity, or a microorganism into which a polypeptide having glutamate dehydrogenase activity has been introduced, but is not limited thereto.
- the microorganism may include a polynucleotide having a promoter activity of the present application, and specifically may include the polynucleotide and/or a gene operably linked to the polynucleotide and encoding a target protein.
- the microorganism may include a vector or expression cassette including the polynucleotide or gene expression control sequence and a gene encoding a target protein, but is not limited thereto.
- the polynucleotide, the gene encoding the target protein, the vector, and the expression cassette may be introduced into the microorganism by transformation, but are not limited thereto. Furthermore, as long as the gene can be expressed in the microorganism, it is irrelevant whether the gene encoding the polynucleotide and the target protein is located on a chromosome or extrachromosomal.
- the term "to/to be expressed" a protein refers to a state in which a target protein, eg, glutamate dehydrogenase or a variant thereof, is introduced into a microorganism or modified to be expressed in a microorganism.
- a target protein eg, glutamate dehydrogenase or a variant thereof
- the target protein may mean a state in which its activity is enhanced compared to endogenous or before modification.
- introduction of a protein may mean exhibiting the activity of a specific protein that the microorganism does not originally have, or exhibiting an enhanced activity compared to the intrinsic activity or activity of the corresponding protein before modification.
- a polynucleotide encoding a specific protein may be introduced into a chromosome of a microorganism, or a vector or expression cassette including a polynucleotide encoding a specific protein may be introduced into a microorganism to exhibit its activity.
- “enhancement of activity” may mean that the activity is improved compared to the intrinsic activity of a specific protein possessed by the microorganism or the activity before modification.
- “Intrinsic activity” may refer to the activity of a specific protein originally possessed by the parent strain prior to transformation when the character of the microorganism changes due to genetic mutation caused by natural or artificial factors.
- the activity enhancement may be achieved by using the polynucleotide sequence having the promoter activity of the present application as an expression control sequence of the target protein.
- the expression control sequence may be an expression control sequence of a gene encoding a protein variant or an expression control sequence of a gene encoding a natural protein on a chromosome. .
- activity enhancement methods may also be used in combination.
- an increase in intracellular copy number of a gene encoding a target protein, a gene encoding a natural protein on a chromosome Any method selected from the group consisting of a method of replacing a gene encoding the protein variant, a method of additionally introducing a mutation into a gene encoding the protein so as to enhance the activity of the protein variant, and a method of introducing a protein variant into a microorganism.
- One or more methods may be used, but are not limited thereto.
- the activity of the target protein can be enhanced by using the polynucleotide having promoter activity of the present application to control the expression of the target protein in microorganisms.
- the activity or concentration of the corresponding protein is generally at least 1%, 10%, 25%, 50%, 75%, 100%, 150%, 200%, 300%, 400% or 500%, may be increased up to 1000% or 2000%, but is not limited thereto.
- unmodified microorganism does not exclude strains containing mutations that may occur naturally in microorganisms, and are natural strains themselves, microorganisms that do not contain polynucleotides having promoter activity of the present application, or Microorganisms that have not been transformed with a vector containing a polynucleotide having promoter activity of the present application are also included.
- microorganisms that produce a target substance includes all microorganisms in which genetic modification has occurred naturally or artificially, and a specific mechanism is inhibited due to causes such as insertion of external genes or enhancement or inactivation of endogenous gene activity. As a weakened or enhanced microorganism, it may be a microorganism in which genetic mutation has occurred or activity has been enhanced for the production of a desired substance.
- the microorganism producing the target substance refers to a microorganism capable of producing an excess of the desired target substance compared to a wild-type or unmodified microorganism, including a polynucleotide having promoter activity of the present application. can
- microorganism producing the target substance may be used interchangeably with terms such as “target substance producing microorganism”, “target substance producing ability”, “target substance producing strain”, and “target substance producing ability”. have.
- the target substance may be an amino acid, specifically lysine, threonine, O-acetyl homoserine, or isoleucine. More specifically, the lysine may be L-lysine, the threonine may be L-threonine, and the isoleucine may be L-isoleucine, but is not limited thereto.
- the microorganism producing the target substance may have an improved ability to produce the target substance, specifically, lysine, threonine, O-acetyl homoserine, or isoleucine.
- the target material-producing microorganism may be a wild-type microorganism or a recombinant microorganism.
- the recombinant microorganisms are as described above.
- the microorganisms may further include mutations such as enhancement of biosynthetic pathways for increased production of target substances, cancellation of feedback inhibition, decomposition pathways or gene inactivation that weakens biosynthetic pathways, and such mutations may be artificially, for example, It can be caused by UV irradiation, but does not exclude natural ones.
- the target substance-producing microorganism may be mutated to produce the target substance.
- a microorganism without the ability to produce a target substance may be a microorganism that has been mutated to have the ability to produce a target substance, or a microorganism whose productivity has been enhanced.
- a wild-type microorganism may be a microorganism into which a protein involved in a biosynthetic pathway or a variant thereof is introduced so as to produce a target substance (KR 10-2011994, KR 10-1947959, KR 10-1996769).
- the target substance-producing microorganism of the present application is aspartokinase (lysC), homoserine dehydrogenase (hom), pyruvate carboxylase (pyc), L-threo It may be a microorganism of the genus Corynebacterium including L-threonine dehydratase (ilvA) or a combination thereof.
- the aspartokinase, homoserine dehydrogenase, pyruvate carboxylase, or L-threonine dehydratase is a wild-type protein, or a protein variant whose activity is weakened or enhanced so as to be advantageous for the production of a target substance. can be
- microorganisms of the present application have at least 1%, 5%, 10%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20 %, 22%, 25%, 29%, 33%, 38%, 44%, 45%, or may have a target material production ability of 48% or more.
- Another aspect of the present application provides a method for producing a target substance comprising culturing the microorganism in a medium.
- the microorganisms and target substances are as described above.
- the method for producing a target substance using a microorganism containing the polynucleotide may be performed using a method widely known in the art.
- the culture may be cultured continuously in a batch process, injection batch or repeated injection batch process (fed batch or repeated fed batch process), but is not limited thereto.
- the medium used for culture must meet the requirements of the particular strain in an appropriate manner.
- Culture media for Corynebacterium strains are known (eg, Manual of Methods for General Bacteriology by the American Society for Bacteriology, Washington D.C., USA, 1981).
- any medium and other culture conditions used for culturing the strain of the present application may be used without particular limitation as long as it is a medium used for culturing common microorganisms of the genus Corynebacterium.
- the strain of the present application may be used as a suitable carbon source, It can be cultured while controlling temperature, pH, etc. under aerobic or anaerobic conditions in a conventional medium containing a nitrogen source, phosphorus, inorganic compounds, amino acids and/or vitamins.
- Examples of the carbon source in the present application include carbohydrates such as glucose, fructose, sucrose, and maltose; sugar alcohols such as mannitol and sorbitol; organic acids such as pyruvic acid, lactic acid, citric acid and the like; Amino acids such as glutamate, methionine, lysine, and the like may be included, but are not limited thereto.
- natural organic nutritional sources such as starch hydrolysate, molasses, blackstrap molasses, rice winter, cassava, sorghum and corn steep liquor can be used, as well as glucose and pasteurized pretreated molasses (i.e., molasses converted to reducing sugars).
- Carbohydrates such as may be used, and various other carbon sources in appropriate amounts may be used without limitation. These carbon sources may be used alone or in combination of two or more.
- nitrogen source examples include inorganic nitrogen sources such as ammonia, ammonium sulfate, ammonium chloride, ammonium acetate, ammonium phosphate, ammonium carbonate, and ammonium nitrate; Organic nitrogen sources such as amino acids, peptones, NZ-amines, meat extracts, yeast extracts, malt extracts, corn steep liquor, casein hydrolysates, fish or degradation products thereof, defatted soybean cakes or degradation products thereof, and the like can be used. These nitrogen sources may be used alone or in combination of two or more, but are not limited thereto.
- inorganic nitrogen sources such as ammonia, ammonium sulfate, ammonium chloride, ammonium acetate, ammonium phosphate, ammonium carbonate, and ammonium nitrate
- Organic nitrogen sources such as amino acids, peptones, NZ-amines, meat extracts, yeast extracts, malt extracts, corn steep liquor, casein hydrolysates, fish or degradation products thereof,
- the number of persons may include monopotassium phosphate, dipotassium phosphate, or a sodium-containing salt corresponding thereto.
- the inorganic compound sodium chloride, calcium chloride, iron chloride, magnesium sulfate, iron sulfate, manganese sulfate, calcium carbonate, and the like may be used.
- amino acids, vitamins, and/or appropriate precursors may be included in the medium.
- L-amino acids and the like may be added to the culture medium of the strain.
- glycine, glutamate, and/or cysteine may be added, and if necessary, L-amino acids such as lysine may be further added, but it is not necessarily limited thereto.
- the medium or precursor may be added to the culture in a batch or continuous manner, but is not limited thereto.
- the pH of the culture can be adjusted by adding compounds such as ammonium hydroxide, potassium hydroxide, ammonia, phosphoric acid, sulfuric acid, etc. to the culture in an appropriate manner during cultivation of the strain.
- an antifoaming agent such as a fatty acid polyglycol ester.
- oxygen or oxygen-containing gas may be injected into the culture, or nitrogen, hydrogen or carbon dioxide gas may be injected without injection of gas or gas to maintain the anaerobic and non-aerobic state.
- the temperature of the culture may be 25 ° C to 40 ° C, more specifically, 28 ° C to 37 ° C, but is not limited thereto.
- the culturing period may be continued until a desired yield of a useful substance is obtained, and specifically may be 1 hour to 160 hours, 10 hours to 100 hours, but is not limited thereto.
- the method for preparing the target substance may further include an additional process after the culturing step.
- the additional process may be appropriately selected according to the purpose of the target material.
- the method for preparing the target substance is obtained from at least one material selected from among the microorganism, the medium, the dried product of the microorganism, the extract of the microorganism, the culture of the microorganism, the supernatant of the culture, and the lysate of the microorganism after the culturing step.
- a step of recovering the target material may be included.
- the method may further include a step of lysing microorganisms (strains) before or simultaneously with the recovering step. Lysis of the strain may be performed by a method commonly used in the art, for example, a lysis buffer, a sonicator, heat treatment, and a French press.
- the lysis step may include, but is not limited to, enzyme reactions such as cell wall degrading enzymes, nucleic acid degrading enzymes, nucleic acid transferases, and proteolytic enzymes.
- drying matter of microorganisms may be used interchangeably with terms such as "dry matter of strains”.
- the dried product of the microorganism may be prepared by drying the cells in which the target substance is accumulated, and may be specifically included in a composition for feed, a composition for food, etc., but is not limited thereto.
- the strain extract may refer to a material remaining after separating cell walls from cells of the strain. Specifically, it may refer to components obtained by lysing cells except for cell walls.
- the strain extract includes a target substance, and components other than the target substance may include, but are not limited to, one or more components of proteins, carbohydrates, nucleic acids, and fibers.
- the target substance which is the target substance
- the target substance may be recovered using a suitable method known in the art.
- the recovery step may include a purification process.
- the purification process may be pure purification by separating only the target substance from the strain. Through the above purification process, a pure purified target material may be prepared.
- the method for preparing the target substance may further include mixing a substance selected from among the strains obtained after the culturing step, their dried products, extracts, cultures, lysates, and the target substances recovered therefrom with an excipient. .
- excipients may be appropriately selected and used according to the intended use or form, and for example, starch, glucose, cellulose, lactose, glycogen, D-mannitol, sorbitol, lactitol, maltodextrin, calcium carbonate, synthetic aluminum silicate, Calcium monohydrogen phosphate, calcium sulfate, sodium chloride, sodium hydrogen carbonate, purified lanolin, dextrin, sodium alginate, methylcellulose, colloidal silica gel, hydroxypropyl starch, hydroxypropylmethylcellulose, propylene glycol, casein, calcium lactate , Primogel, and gum arabic, and specifically, may be one or more components selected from starch, glucose, cellulose, lactose, dextrin, glycogen, D-mannitol, and maltodextrin, but is not limited thereto.
- the excipient may include, for example, a preservative, a wetting agent, a dispersing agent, a suspending agent, a buffer, a stabilizer, or an isotonic agent, but is not limited thereto.
- Another aspect of the present application is the use as a promoter of a polynucleotide having promoter activity in which nucleotides 27, 28, 31, 32 and 36 in the polynucleotide sequence of SEQ ID NO: 1 are substituted with other nucleotides to provide.
- the polynucleotide is as described above.
- Example 1-1 gdh promoter mutation library using random mutagenesis
- nucleotide sequence (SEQ ID NO: 1) containing the promoter region of the gdh gene (NCBI registration number NCgl1999) of wild type Corynebacterium glutamicum ATCC13032 based on the NIH GenBank of the US National Institutes of Health ) was obtained.
- the Diversify PCR Random Mutagenesis Kit (takara) was used as a template with the promoter of the gdh gene consisting of the nucleotide sequence of SEQ ID NO: 1, and mutation was randomly induced using the primers of SEQ ID NO: 5 and SEQ ID NO: 6 according to the manufacturer's manual.
- This other gdh promoter mutant PCR product (Pmgdh) was obtained.
- the ORF (Open Reading Frame) of the GFP gene was subjected to PCR using the pGFPuv vector (clontech, USA) as a template and the primers of SEQ ID NOs: 7 and 8. After 30 cycles of denaturation for 30 seconds, annealing at 55°C for 30 seconds, and polymerization at 72°C for 1 minute, polymerization was performed at 72°C for 7 minutes to obtain a gene fragment containing an ORF of GFP.
- pCES208 J. Microbiol. Biotechnol. 18:639-647
- E. coli-Corynebacterium shuttle vector prepared by digesting the amplification product gdh promoter mutant PCR product (Pmgdh) and GFP with BamHI/SalI restriction enzyme , 2008
- a recombinant vector library in which Pmgdh is linked to GFP was constructed using the In-Fusion® HD cloning kit (clontech).
- Each vector was named from pCES_Pm1gdh_gfp to pCES_Pm100gdh_gfp.
- a recombinant vector in which the wild-type gdh gene promoter (SEQ ID NO: 1) and GFP were linked was used.
- wild type Corynebacterium glutamicum ATCC13032 as a template and primers of SEQ ID NO: 5 and SEQ ID NO: 6, a promoter gene fragment of the wild type gdh gene was obtained.
- the ORF (Open Reading Frame) of the GFP gene was subjected to PCR using the pGFPuv vector (clontech, USA) as a template and the primers of SEQ ID NOs: 7 and 8. After 30 cycles of denaturation for 30 seconds, annealing at 55°C for 30 seconds, and polymerization at 72°C for 1 minute, polymerization was performed at 72°C for 7 minutes to obtain a gene fragment containing an ORF of GFP.
- pCES208 J. Microbiol. Biotechnol. 18:639-647
- E. coli-Corynebacterium shuttle vector prepared by digesting the amplification product gdh wild-type promoter PCR product (Pgdh) and GFP with BamHI/SalI restriction enzymes , 2008
- a recombinant vector in which Pgdh is linked to GFP was constructed using the In-Fusion® HD cloning kit (clontech), which was named pCES_Pgdh_gfp.
- the vector pCES208 and the recombinant vector pCES_Pmgdh_gfp library were electroporated into Corynebacterium glutamicum ATCC13032 (Appl. Microbiol. Biothcenol.
- the transformed strains were selected in a selection medium containing 25 mg/L kanamycin, and these were respectively ATCC13032/pCES, ATCC13032/pCES_Pmgdh_gfp (ATCC13032/pCES_Pm1gdh_gfp to ATCC13032/pCES_Pm100gdh_gfp) and ATCC1303 ATCC1303. It was named pCES_Pgdh_gfp.
- Example 1-3 Screening for gdh promoter variants
- Corynebacterium glutamicum ATCC13032 / pCES, ATCC13032 / pCES_Pgdh_gfp and ATCC13032 / pCES_Pmgdh_gfp were cultured in the following manner, and the activity of GFP was measured.
- the medium glucose 20 g, ammonium sulfate 5 g, yeast extract 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, biotin 150 ⁇ g, Thiamine hydrochloride 1.5 mg, calcium pantothenic acid 3 mg, nicotinamide 3 mg (based on 1 L of distilled water), pH 7.2) were inoculated with each of the transformed Corynebacterium glutamicum strains in a flask containing 25 ml, and at 30 ° C. It was cultured with shaking for 20 hours.
- PCR products corresponding to the promoter mutations were obtained using primers of SEQ ID NO: 13 and SEQ ID NO: 14 using the vectors pCES_Pm3gdh_gfp, pCES_Pm16gdh_gfp, and pCES_Pm78gdh_gfp as templates, respectively.
- the three amplification products were mixed with the pDCM2 vector (Korean Publication No. 10-2020-0136813) prepared by digestion with SmaI restriction enzyme in advance to construct a recombinant vector using the In-Fusion® HD cloning kit (clontech), which were respectively They were named pDCM2_Pm3gdh_gdh, pDCM2_Pm16gdh_gdh, and pDCM2_Pm78gdh_gdh.
- the CJ3P strain is a Corynebacterium glutami with L-lysine production ability by introducing three mutations (pyc (Pro458Ser), hom (Val59Ala), lysC (Thr311Ile)) into wild strains based on previously known technology. It is a Kumbh strain.
- the vectors prepared in Example 2 were introduced into the CJ3P strain by electroporation, and then the transformed strain was obtained in a selection medium containing 25 mg/L of kanamycin.
- the strain into which the gdh promoter variant was introduced by the DNA fragment inserted into the chromosome by the secondary recombination process (cross-over) was selected through PCR and sequencing using primers of SEQ ID NO: 9 and SEQ ID NO: 10, and the above
- the selected strains were named Corynebacterium glutamicum CJ3P::Pm3gdh_gdh, CJ3P::Pm16gdh_gdh, and CJ3P::Pm78gdh_gdh.
- each strain was inoculated into a 250 ml corner-baffle flask containing 25 ml of seed medium, and cultured at 30° C. for 20 hours with shaking at 200 rpm. Then, 1 ml of the seed culture was inoculated into a 250 ml corner-baffle flask containing 24 ml of production medium, and incubated at 32° C. for 48 hours with shaking at 200 rpm.
- the composition of the seed medium and production medium is as follows.
- Table 3 shows the L-lysine concentration and concentration increase rate in the culture solution for Corynebacterium glutamicum CJ3P, CJ3P::Pm3gdh_gdh, CJ3P::Pm16gdh_gdh and CJ3P::Pm78gdh_gdh strains.
- CJ3P concentration of L-lysine increased in the three strains into which the gdh promoter variant was introduced compared to the parent strain, CJ3P.
- the CJ3P::gdhPm3_gdh was named CM03-1660, and It was deposited with the Korea Microbial Conservation Center, an entrusted institution, on April 5, 2021, and was given the accession number KCCM12970P.
- a vector for introducing lysC (L377K) was first constructed.
- PCR was performed using the primers of SEQ ID NOs: 17 and 18 and SEQ ID NOs: 19 and 20 using the chromosome of the wild-type Corynebacterium glutamicum ATCC13032 strain as a template. After denaturation at 95 ° C for 5 minutes, denaturation at 95 ° C for 30 seconds, annealing at 55 ° C for 30 seconds, and polymerization at 72 ° C for 30 seconds were repeated 30 times, polymerization was performed at 72 ° C for 7 minutes to obtain each PCR product. .
- the amplification product was previously digested with SmaI restriction enzyme and mixed with the prepared pDCM2 vector to prepare a recombinant vector using the In-Fusion® HD cloning kit, and named pDCM2_lysC(L377K).
- the pDCM2_lysC (L377K) vector prepared above was introduced into the Corynebacterium glutamicum ATCC13032 strain by electroporation, and then the transformed strain was obtained in a selective medium containing 25 mg/L of kanamycin.
- a strain in which a nucleotide mutation was introduced into the lysC gene by a DNA fragment inserted into the chromosome by a secondary recombination process (cross-over) was selected through PCR and sequencing using primers of SEQ ID NO: 25 and SEQ ID NO: 26. , The selected strain was named ATCC13032 :: lysC (L377K).
- PCR was performed using primers of SEQ ID NOs: 21 and 22 and primers of SEQ ID NOs: 23 and 24 using the chromosome of Corynebacterium glutamicum ATCC13032 strain as a template. PCR conditions were denaturation at 95 ° C for 5 minutes, denaturation at 95 ° C for 30 seconds, annealing at 55 ° C for 30 seconds, and polymerization at 72 ° C for 30 seconds were repeated 30 times, followed by polymerization at 72 ° C for 7 minutes.
- the amplification product was previously digested with SmaI restriction enzyme and mixed with the prepared pDCM2 vector to prepare a recombinant vector using the In-Fusion® HD cloning kit, and named pDCM2_hom(R398Q).
- the pDCM2_hom (R398Q) vector prepared above was introduced into the Corynebacterium glutamicum ATCC13032 :: lysC (L377K) strain prepared above by electroporation, and then transformed in a selective medium containing 25 mg / L of kanamycin. was obtained.
- Strains in which a nucleotide mutation was introduced into the hom gene by a DNA fragment inserted into the chromosome by a secondary recombination process (cross-over) were selected through PCR and sequencing using primers of SEQ ID NO: 27 and SEQ ID NO: 28, , The selected strain was named Corynebacterium glutamicum ATCC13032::lysC(L377K)_hom(R398Q).
- the transformed strain was transformed in a selection medium containing 25 mg/L of kanamycin. Acquired.
- the strain into which the gdh promoter variant was introduced by the DNA fragment inserted into the chromosome by the secondary recombination process (cross-over) was selected through PCR and sequencing using primers of SEQ ID NO: 9 and SEQ ID NO: 10, and the above The selected strain was Corynebacterium glutamicum ATCC13032 :: lysC (L377K)_hom (R398Q) :: Pm3gdh_gdh, ATCC13032 :: lysC (L377K)_hom (R398Q) :: Pm16gdh_gdh, ATCC13032 :: lysC (L377K)_hom ( R398Q)::Pm78gdh_gdh.
- each strain was inoculated into a 250 ml corner-baffle flask containing 25 ml of seed medium, and cultured at 30° C. for 20 hours with shaking at 200 rpm. Then, 1 ml of the seed culture was inoculated into a 250 ml corner-baffle flask containing 24 ml of production medium, and incubated at 32° C. for 48 hours with shaking at 200 rpm.
- the composition of the seed medium and production medium is as follows.
- the vectors prepared in Example 2 were introduced into a wild type strain, Corynebacterium glutamicum ATCC13032, by electroporation, and then transformed strains were obtained in a selective medium containing 25 mg/L of kanamycin.
- the strain into which the gdh promoter variant was introduced by the DNA fragment inserted into the chromosome by the secondary recombination process (cross-over) was selected through PCR and sequencing using primers of SEQ ID NO: 9 and SEQ ID NO: 10, and the above
- the selected strains were named Corynebacterium glutamicum ATCC13032::Pm3gdh_gdh, ATCC13032::Pm16gdh_gdh, ATCC13032::Pm78gdh_gdh.
- Corynebacterium glutamicum ATCC13032 used as a parent strain in order to evaluate the O-acetyl homoserine production ability of ATCC13032::Pm3gdh_gdh, ATCC13032::Pm16gdh_gdh and ATCC13032::Pm78gdh_gdh strains prepared in Example 3-3-1 After culturing the strain in the same way as the following, it was analyzed.
- One platinum strain was inoculated into a 250 ml corner-baffle flask containing 25 ml of the following medium, and cultured at 33 degrees for 20 hours with shaking at 200 rpm.
- Table 5 shows the O-acetyl homoserine concentration and concentration increase rate in the culture medium for Corynebacterium glutamicum ATCC13032, ATCC13032::Pm3gdh_gdh, ATCC13032::Pm16gdh_gdh and ATCC13032::Pm78gdh_gdh strains.
- the vectors prepared in Example 2 were introduced into the CJP1 strain by electroporation, and then the transformed strain was obtained in a selection medium containing 25 mg/L of kanamycin.
- the strain into which the gdh promoter variant was introduced by the DNA fragment inserted into the chromosome by the secondary recombination process (cross-over) was selected through PCR and sequencing using primers of SEQ ID NO: 9 and SEQ ID NO: 10, and the above
- the selected strains were named Corynebacterium glutamicum CJP1::Pm3gdh_gdh, CJP1::Pm16gdh_gdh, and CJP1::Pm78gdh_gdh.
- Corynebacterium glutamicum CJP1/pECCG117-ilvA (V323A) used as parent strain CJP1::Pm3gdh_gdh/pECCG117-ilvA (V323A), CJP1::Pm16gdh_gdh/pECCG117-ilvA prepared in Example 3-4-1 (V323A) and CJP1::Pm78gdh_gdh/pECCG117-ilvA (V323A) strains were cultured and analyzed in the following manner to evaluate the L-isoleucine-producing ability.
- each strain was inoculated into a 250 ml corner-baffle flask containing 25 ml of seed medium, and cultured at 30° C. for 20 hours with shaking at 200 rpm. Then, 1 ml of the seed culture was inoculated into a 250 ml corner-baffle flask containing 24 ml of production medium, and incubated at 32° C. for 48 hours with shaking at 200 rpm.
- the composition of the seed medium and production medium is as follows.
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Abstract
Description
균주 | 형광 감도 |
ATCC13032/pCES | 0 |
ATCC13032/pCES_Pgdh_gfp | 583 |
ATCC13032/pCES_Pm3gdh_gfp | 1217 |
ATCC13032/pCES_Pm16gdh_gfp | 1205 |
ATCC13032/pCES_Pm78gdh_gfp | 1198 |
서열번호 | 변이체 | 서열 |
2 | Pm3gdh | ATTCTTTGTGGTCATATCTGTGCGACTGTGGTATACTTGAACGTGAGCATTTACCAGCCTAAATGCCCGCAGTGAGTTAAGTCTCAAAGCAAGAAGTTGCTCTTTAGGGCATCCGTAGTTTAAAACTATTAACCGTTAGGTATGACAAGCCGGTTGATGTGAACGCAGTTTTTAAAAGTTTCAGGATCAGATTTTTCACAGGCATTTTGCTCCAGCAAACGCCTAGGATGTACATGGTGCCCTCAATGGGAACCACCAACATCACTAAATGGCCCAGGTACACACTTTAAAATCGTGCGCGCATGCAGCCGAGATGGGAACGAGGAAATC |
3 | Pm16gdh | ATTCTTTGTGGTCATATCTGTGCGACTGTGGTATACTTGAACGTGAGCATTTACCAGCCTAAATGTCCGCAGTGAGTTAAGTCTCAAAGCAAGAAGTTGCTCTTTAGGGCATCCGTAGTTTAAAACTATTAACCGTTAGGTATGACAAGCCGGTTGATGTGAACGCAGTTTTTAAAAGTTTCAGGATCAGATTTTTCACAGGCATTTTGCTCCAGCAAACGCCTAGGATGTACATGGTGCCCTCAATGGGAACCACCAACGTCACTAAATGGCCCAGGTACACACTTTAAAATCGTGCGCGCATGCAGCCGAGATGGGAACGAGGAAATC |
4 | Pm78gdh | ATTCTTTGTGGTCATATCTGTGCGACTGTGGTATACTTGAACGTGAGCATTTACCAGCCTAAATGTCCGCAGTGAGTTAAGTCTCAAAGCAAGAAGTTGCTCTTTAGGGCATCCGTAGTTTAAAACTATTAACCGTTAGGTATGACAAGCCGGTTGATGTGAACGCAGTTTTTAAAAGTTTCAGGATCAGATTTTTCACAGGCATTTTGCTCCAGCAAACGCCTAGGATGTACATGGTGCCCTCAATGGGAACCACCAACATCACTAAATGGCCCAGGTACACACTTTAAAATCGTGCGCGCATGCAGCCGAGATGGGAACGAGGAAATC |
균주명 | L-라이신 농도(g/L) | L-라이신 농도 증가율(%) |
CJ3P | 4.12 | - |
CJ3P::gdhPm3_gdh | 4.96 | 20.39% |
CJ3P::gdhPm16_gdh | 4.84 | 17.48% |
CJ3P::gdhPm78_gdh | 4.79 | 16.26% |
균주명 | L-쓰레오닌 농도(g/L) | L-쓰레오닌 농도 증가율(%) |
ATCC13032::lysC(L377K)_hom(R398Q) | 0.83 | - |
ATCC13032:: lysC(L377K)_hom(R398Q)::Pm3gdh_gdh | 1.11 | 33.73% |
ATCC13032:: lysC(L377K)_hom(R398Q)::Pm16gdh_gdh | 0.95 | 14.46% |
ATCC13032:: lysC(L377K)_hom(R398Q)::Pm78gdh_gdh | 1.02 | 22.89% |
균주명 | O-아세틸 호모세린 농도(g/L) | O-아세틸 호모세린 농도 증가율(%) |
ATCC13032 | 0.31 | - |
ATCC13032::Pm3gdh_gdh | 0.45 | 45.16% |
ATCC13032::Pm16gdh_gdh | 0.39 | 25.80% |
ATCC13032::Pm78gdh_gdh | 0.43 | 38.70% |
균주명 | L-이소류신 농도(g/L) | L-이소류신 농도 증가율(%) |
CJP1/pECCG117-ilvA(V323A) | 0.74 | - |
CJP1::Pm3gdh_gdh/pECCG117-ilvA(V323A) | 1.10 | 48.65% |
CJP1::Pm16gdh_gdh/pECCG117-ilvA(V323A) | 0.96 | 29.73% |
CJP1::Pm78gdh_gdh/pECCG117-ilvA(V323A) | 1.07 | 44.59% |
Claims (18)
- 서열번호 1의 폴리뉴클레오티드 서열에서 27번, 28번, 31번, 32번 및 36번 뉴클레오티드가 다른 뉴클레오티드로 치환된, 프로모터 활성을 갖는 폴리뉴클레오티드.
- 제1항에 있어서, 추가적으로 66번 및 261번 뉴클레오티드가 다른 뉴클레오티드로 치환된 것인, 폴리뉴클레오티드.
- 제1항에 있어서, 추가적으로 66번 뉴클레오티드가 다른 뉴클레오티드로 치환된 것인, 폴리뉴클레오티드.
- 제1항에 있어서, 상기 폴리뉴클레오티드는 서열번호 1의 폴리뉴클레오티드 서열에서 27번 뉴클레오티드인 아데닌(A)이 티민(T)으로, 28번 뉴클레오티드인 시토신(C)이 구아닌(G)으로, 31번 뉴클레오티드인 시토신(C)이 구아닌(G)으로, 32번 뉴클레오티드인 시토신(C)이 티민(T)으로, 36번 뉴클레오티드인 아데닌(A)이 시토신(C)으로 치환된 것인, 폴리뉴클레오티드.
- 제4항에 있어서, 상기 폴리뉴클레오티드는 서열번호 2로 표시되는 것인, 폴리뉴클레오티드.
- 제2항에 있어서, 상기 폴리뉴클레오티드는 서열번호 1의 폴리뉴클레오티드 서열에서 27번 뉴클레오티드인 아데닌(A)이 티민(T)으로, 28번 뉴클레오티드인 시토신(C)이 구아닌(G)으로, 31번 뉴클레오티드인 시토신(C)이 구아닌(G)으로, 32번 뉴클레오티드인 시토신(C)이 티민(T)으로, 36번 뉴클레오티드인 아데닌(A)이 시토신(C)으로, 66번 뉴클레오티드인 시토신(C)이 티민(T)으로, 261번 뉴클레오티드인 아데닌(A)이 구아닌(G)으로 치환된 것인, 폴리뉴클레오티드.
- 제6항에 있어서, 상기 폴리뉴클레오티드는 서열번호 3으로 표시되는 것인, 폴리뉴클레오티드.
- 제3항에 있어서, 상기 폴리뉴클레오티드는 서열번호 1의 폴리뉴클레오티드 서열에서 27번 뉴클레오티드인 아데닌(A)이 티민(T)으로, 28번 뉴클레오티드인 시토신(C)이 구아닌(G)으로, 31번 뉴클레오티드인 시토신(C)이 구아닌(G)으로, 32번 뉴클레오티드인 시토신(C)이 티민(T)으로, 36번 뉴클레오티드인 아데닌(A)이 시토신(C)으로, 66번 뉴클레오티드인 시토신(C)이 티민(T)으로 치환된 것인, 폴리뉴클레오티드.
- 제8항에 있어서, 상기 폴리뉴클레오티드는 서열번호 4로 표시되는 것인, 폴리뉴클레오티드.
- 제1항 내지 제9항 중 어느 한 항에 있어서, 상기 폴리뉴클레오티드는 목적 단백질을 코딩하는 유전자와 작동 가능하게 연결되는, 폴리뉴클레오티드.
- 제1항 내지 제9항 중 어느 한 항의 폴리뉴클레오티드; 및 상기 폴리뉴클레오티드와 작동 가능하게 연결된 목적 단백질을 코딩하는 유전자를 포함하는 발현 카세트.
- 제10항에 있어서, 상기 목적 단백질은 글루탐산 탈수소효소(glutamate dehydrogenase, gdh)인, 발현 카세트.
- 제1항 내지 제9항 중 어느 한 항의 폴리뉴클레오티드; 또는 제1항 내지 제9항 중 어느 한 항의 폴리뉴클레오티드 및 상기 폴리뉴클레오티드와 작동 가능하게 연결된 목적 단백질을 코딩하는 유전자를 포함하는, 코리네박테리움 속 미생물.
- 제13항에 있어서, 상기 목적 단백질은 글루탐산 탈수소효소(glutamate dehydrogenase, gdh)인, 코리네박테리움 속 미생물.
- 제13항에 있어서, 상기 코리네박테리움 속 미생물은 코리네박테리움 글루타미쿰(Corynebacterium glutamicum)인, 미생물.
- 제13항의 코리네박테리움 속 미생물을 배지에서 배양하는 단계; 및 상기의 배지에서 목적 물질을 회수하는 단계를 포함하는, 목적 물질을 생산하는 방법.
- 제16항에 있어서, 상기 목적 물질은 라이신, 쓰레오닌, O-아세틸 호모세린, 또는 이소류신인, 방법.
- 서열번호 1의 폴리뉴클레오티드 서열에서 27번, 28번, 31번, 32번 및 36번 뉴클레오티드가 다른 뉴클레오티드로 치환된, 프로모터 활성을 갖는 폴리뉴클레오티드의, 프로모터로서의 용도.
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