WO2024123109A1 - 퓨린 뉴클레오티드를 생산하는 미생물 및 이를 이용한 퓨린 뉴클레오티드의 생산방법 - Google Patents
퓨린 뉴클레오티드를 생산하는 미생물 및 이를 이용한 퓨린 뉴클레오티드의 생산방법 Download PDFInfo
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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
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- C12N1/00—Microorganisms; 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
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- 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
- C12N9/88—Lyases (4.)
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- 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
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/26—Preparation of nitrogen-containing carbohydrates
- C12P19/28—N-glycosides
- C12P19/30—Nucleotides
- C12P19/32—Nucleotides having a condensed ring system containing a six-membered ring having two N-atoms in the same ring, e.g. purine nucleotides, nicotineamide-adenine dinucleotide
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- C12Y—ENZYMES
- C12Y403/00—Carbon-nitrogen lyases (4.3)
- C12Y403/01—Ammonia-lyases (4.3.1)
- C12Y403/01017—L-Serine ammonia-lyase (4.3.1.17)
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- C—CHEMISTRY; METALLURGY
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- 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
Definitions
- the present application relates to microorganisms whose serine dehydratase protein activity is weakened compared to the intrinsic activity; A method for producing purine nucleotides comprising culturing the microorganism in a medium; A composition for producing purine nucleotides comprising the microorganism, a culture of the microorganism, a fermentation product of the microorganism, or a combination of two or more thereof; and the use of said microorganism for producing purine nucleotides.
- the above-mentioned methods for producing purine nucleotides include (1) enzymatically decomposing ribonucleic acid (RNA) extracted from yeast cells, (2) cultivating microorganisms that produce them and directly recovering purine nucleotides in the culture medium. There are a fermentation production method, (3) a method of chemically phosphorylating nucleosides produced by fermentation, and (4) a method of enzymatically phosphorylating nucleosides produced by fermentation (Korean Patent Registration No. 10-1049023). Ho, Japanese Patent Publication No. 4363042, Korean Patent Registration No. 10-1210704, Agri. Chem., 36(9), 1511-1522).
- method (1) has problems with raw material supply and economic feasibility, while method (2) is widely used because it is economically and environmentally advantageous.
- GMP production which is one of the purine nucleotides
- a method of producing GMP by enzymatically converting XMP produced through microbial fermentation is also used.
- ROS reactive oxygen species
- the present inventors have disclosed a microorganism whose serine dehydratase protein activity is weakened compared to the intrinsic activity, a method for producing purine nucleotides comprising culturing the microorganism in a medium, the microorganism, a culture of the microorganism, and a fermented product of the microorganism. Or, the present application was completed by developing a composition for producing purine nucleotides containing a combination of two or more of them and a use of the microorganism for producing purine nucleotides.
- One aspect of the present application provides a microorganism having a purine nucleotide production ability in which serine dehydratase protein activity is weakened compared to the intrinsic activity.
- the microorganism may be one in which the activity of any one or more proteins selected from the group consisting of the following (a) to (d) is adjusted:
- the microorganism may be a microorganism of the genus Corynebacterium.
- the microorganism of the Corynebacterium genus may be Corynebacterium stationis.
- the microorganism may have an increased ability to produce purine nucleotides compared to an unmodified microorganism.
- Another aspect of the present application provides a method for producing purine nucleotides, comprising culturing in a medium a microorganism whose serine dehydratase protein activity is weakened compared to the intrinsic activity.
- the method may additionally include the step of recovering the target substance from the cultured microorganism, a culture of the microorganism, a fermentation product of the microorganism, or the culture medium.
- compositions for producing purine nucleotides comprising a microorganism whose serine dehydratase protein activity is weakened compared to the intrinsic activity, a culture of the microorganism, a fermentation product of the microorganism, or a combination of two or more of these. to provide.
- Another aspect of the present application provides the use of a microorganism whose serine dehydratase protein activity is weakened compared to its intrinsic activity for producing purine nucleotides.
- the term “about” may appear before a specific numeric value.
- the term “about” includes not only the exact number written after the term, but also a range that is approximately that number or close to that number. By considering the context in which the number is presented, one can determine whether it is close to or close to the specific number mentioned.
- the term “about” may refer to a range of -10% to +10% of a numeric value.
- the term “about” may refer to a range of -5% to +5% of a given numeric value. However, it is not limited to this.
- the terms “first, second, third,,” “i), ii), iii)...” or descriptions such as “(a), (b), (c), (d)...” is used to distinguish similar configurations, and these terms are not intended to be performed sequentially or in sequence.
- the steps may be performed simultaneously, with no time interval, or may be performed in seconds, minutes, hours, days, or Alternatively, it may be performed several months apart.
- the term “consisting essentially of” means that an unspecified component may be present if the characteristics of the subject matter claimed in the present application are not substantially affected by the presence of the unspecified component.
- the term “consisting of” means that the proportion of a particular ingredient(s) totals 100%. Ingredients or features that follow the term “consisting of” may be essential or obligatory. In some embodiments, in addition to the components or features listed below as “consisting of” any other optional or non-essential components may be excluded.
- the term “comprising” means the presence of a feature, step, or component described below the term, and does not exclude the presence or addition of one or more features, steps, or components.
- Components or features described below as “including” in this application may be essential or mandatory, but in some embodiments, other optional or non-essential components or features may be further included.
- One aspect of the present application provides a microorganism having a purine nucleotide production ability in which serine dehydratase protein activity is weakened compared to the intrinsic activity.
- the attenuated serine dehydratase protein activity is a natural wild-type microorganism or an unmodified microorganism (e.g., a microorganism expressing a polypeptide having wild-type serine dehydratase protein activity (e.g., the polypeptide of SEQ ID NO: 66) or It may be defined as the increased purine nucleotide production capacity of the microorganism of the present application compared to the production capacity of the strain (the strain before the serine dehydratase protein activity is weakened or weakened compared to the intrinsic activity), but is not limited thereto.
- the serine dehydratase protein activity can be measured by measuring purine nucleotide production ability or yield, but is not limited thereto.
- the term “serine dehydratase (L-serine dehydratase)” is an enzyme that catalyzes the chemical reaction of L-serine ⁇ pyruvate + NH 3 .
- the serine dehydratase of this application can be used interchangeably with SdaA or L-serine ammonia decomposition enzyme.
- the serine dehydratase of the present application may be a protein having serine dehydratase activity encoded by the sdaA gene, but the type is not particularly limited as long as it has an activity corresponding to serine dehydratase.
- the serine dehydratase encoded by the sdaA gene is known in the art, and the amino acid and polynucleotide sequences of the serine dehydratase can be obtained from known databases, examples of which include GenBank of NCBI, but are limited thereto. It doesn't work.
- the serine dehydratase protein may include the amino acid sequence of SEQ ID NO: 66 or an amino acid sequence with more than 60% homology or identity, but as long as it has serine dehydratase protein activity. , but is not limited to this.
- the polypeptide having serine dehydratase protein activity is SEQ ID NO: 66 or at least 60%, 70%, 80%, 85%, 90%, 95%, 96%, 97%, 98% of SEQ ID NO: 66, Alternatively, it may have, include, consist of, or essentially consist of an amino acid sequence having at least 99% homology or identity.
- the serine dehydratase protein may refer to a protein inherently present in Corynebacterium genus microorganisms or Corynebacterium stasis, but is not limited thereto, and specifically, Corynebacterium genus It may be a serine dehydratase protein consisting of the amino acid sequence of SEQ ID NO: 66, which is inherently present in microorganisms or Corynebacterium stasis, but is not limited thereto.
- sequences that do not change the function of the protein are added before and after the amino acid sequence, mutations that may occur naturally, silent mutations, or preservation thereof. Substitutions are not excluded, and it is obvious that such sequence additions or mutations are within the scope of the present application.
- a polypeptide can be conjugated with a signal (or leader) sequence at the N-terminus of a protein that is involved in the transfer of the protein co-translationally or post-translationally.
- the polypeptide may also be conjugated with other sequences or linkers to enable identification, purification, or synthesis of the polypeptide.
- conservative substitution means replacing one amino acid with another amino acid having similar structural and/or chemical properties. These amino acid substitutions may generally occur based on similarities in the polarity, charge, solubility, hydrophobicity, hydrophilicity and/or amphipathic nature of the residues.
- positively charged (basic) amino acids include arginine, lysine, and histidine
- Negatively charged (acidic) amino acids include glutamic acid and aspartic acid
- Amino acids with nonpolar side chains include glycine, alanine, valine, leucine, isoleucine, methionine, phenylalanine, tryptophan, and proline
- Amino acids with polar or hydrophilic side chains (polar amino acids) can be classified into serine, threonine, cysteine, tyrosine, asparagine, and glutamine.
- amino acids with electrically charged side chains such as arginine, lysine, histidine, glutamic acid, and aspartic acid
- amino acids with uncharged side chains also referred to as neutral amino acids
- It can be classified into glycine, alanine, valine, leucine, isoleucine, methionine, phenylalanine, tryptophan, proline, serine, threonine, cysteine, tyrosine, asparagine, and glutamine.
- phenylalanine, tryptophan, and tyrosine can be classified as aromatic amino acids.
- valine, leucine, and isoleucine can be classified as branched amino acids.
- 20 types of amino acids are classified according to size, starting from the amino acid group with relatively small volume; glycine, alanine, serine; Cysteine, proline, threonine, aspartic acid, asparagine; Valine, histidine, glutamic acid, glutamine; Isoleucine, leucine, methionine, lysine, arginine; and phenylalanine, tryptophan, and tyrosine.
- conservative substitutions may have little or no effect on the activity of the polypeptide.
- the base sequence encoding the serine dehydratase may be a base sequence encoding a protein exhibiting serine dehydratase activity.
- the serine dehydratase protein having the amino acid sequence of SEQ ID NO: 66 has 60% or more, 70%, 75%, or 80% homology or identity with the sequence of SEQ ID NO: 67 or the sequence of SEQ ID NO: 67. or more, 85% or more, 90% or more, 95% or more, 96% or more, 97% or more, 98% or more, and less than 100% of the nucleotide sequence, or may consist of or consist essentially of the nucleotide sequence. It may be encoded by a polynucleotide, but is not limited thereto. Additionally, the nucleotide sequence of SEQ ID NO: 67 can be obtained from known databases, examples of which include NCBI's GenBank, but are not limited thereto.
- the gene containing the nucleotide sequence of SEQ ID NO: 67 is a polynucleotide containing the nucleotide sequence of SEQ ID NO: 67, a gene or polynucleotide having the nucleotide sequence of SEQ ID NO: 67, and a gene consisting of the nucleotide sequence of SEQ ID NO: 67.
- it can be used in combination with polynucleotide.
- the polynucleotide of the present application does not change the amino acid sequence of the serine dehydratase of the present application due to codon degeneracy or in consideration of the preferred codon in the organism in which the serine dehydratase of the present application is to be expressed.
- Various modifications may be made to the coding area within the scope not permitted. Therefore, it is obvious that a polynucleotide that can be translated into a polypeptide consisting of the amino acid sequence of the serine dehydratase of the present application or a polypeptide having homology or identity thereto due to codon degeneracy may also be included.
- the polynucleotide of the present application may be SEQ ID NO: 67 or a degenerated sequence thereof.
- the polynucleotide of the present application has at least 60%, at least 70%, at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, and at least 96% homology or identity with SEQ ID NO: 67. , has or includes a nucleotide sequence that is 97% or more, 98% or more, and less than 100%, or has 60% or more, 70% or more, 75% or more, 80% or more, or 85% or more homology or identity to SEQ ID NO: 67. , 90% or more, 95% or more, 96% or more, 97% or more, 98% or more, and less than 100% of base sequences, but is not limited thereto.
- polynucleotide of the present application can be hybridized under stringent conditions with a probe that can be prepared from a known genetic sequence, for example, a complementary sequence to all or part of the polynucleotide sequence of the present application, and the serine dehydration of the present application Any sequence encoding a chemical enzyme may be included without limitation.
- homology refers to the degree to which two given amino acid sequences or base sequences are related and may be expressed as a percentage.
- homology and identity can often be used interchangeably.
- sequence homology or identity of a conserved polynucleotide or polypeptide is determined by standard alignment algorithms, and may be used with a default gap penalty established by the program used.
- Substantially homologous or identical sequences generally undergo moderate or high stringency conditions along the entire sequence or at least about 50%, 60%, 70%, 80%, or 90% of the full-length. It can hybridize under stringent conditions. It is obvious that hybridization also includes polynucleotides containing common codons or codons taking codon degeneracy into account.
- Whether any two polynucleotide or polypeptide sequences have homology, similarity, or identity can be determined, for example, by Pearson et al (1988) [Proc. Natl. Acad. Sci. USA 85]: It can be determined using a known computer algorithm such as the "FASTA” program using default parameters as in 2444. Or, as performed in the Needleman program in 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.
- a GAP program can be defined as 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) unitary matrices (containing values 1 for identity and 0 for non-identity), PAM Matrix (Schwartz and Dayhoff, eds., Atlas Of Protein Sequence) And Structure, disclosed by the National Biomedical Research Foundation (1978)), Gribskov et al (1986) Nucl. Acids Res. 14: Weighted comparison matrix of 6745 (or EDNAFULL (EMBOSS version of NCBI NUC4.4) permutation matrix); (2) a penalty of 3.0 for each gap and an additional 0.10 penalty for each symbol in each gap (or a gap opening penalty of 10 and a gap extension penalty of 0.5); and (3) no penalty for end gaps.
- any two polynucleotide or polypeptide sequences have homology, similarity, or identity can be confirmed by comparing the sequences by Southern hybridization experiments under defined stringent conditions, and the appropriate hybridization conditions defined are within the scope of the relevant technology. , can be determined by methods well known to those skilled in the art (e.g., J. Sambrook et al., Molecular Cloning, A Laboratory Manual; F.M. Ausubel et al., Current Protocols in Molecular Biology, John Wiley & Sons, Inc., New York). , but is not limited to this.
- stringent condition refers to conditions that enable specific hybridization between polynucleotides. These conditions are specifically described in Sambrook et al., supra, 9.50-9.51, 11.7-11.8. For example, among polynucleotides with high homology or identity, 60% or more, 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 95% or more, 96% or more, 97% or more, Conditions in which polynucleotides with 98% or more or 99% or more homology or identity hybridize with each other, and polynucleotides with lower homology or identity do not hybridize with each other, or washing conditions for normal southern hybridization 1 time at a salt concentration and temperature equivalent to 60°C, 1 ⁇ SSC, 0.1% SDS, specifically 60°C, 0.1 ⁇ SSC, 0.1% SDS, more specifically 68°C, 0.1 ⁇ SSC, 0.1% SDS, Specifically, conditions for washing 2 to 3 times can be listed.
- hybridization requires that two nucleotides have complementary sequences, although mismatches between bases may be 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.
- adenosine is complementary to thymine
- cytosine is complementary to guanine.
- the polynucleotide of the present application may also include substantially similar base sequences as well as isolated nucleic acid fragments that are complementary to the entire sequence.
- a polynucleotide having homology or identity to the polynucleotide of the present application can be detected using hybridization conditions including a hybridization step at a Tm value of 55°C and using the conditions described above.
- the Tm value may be 60°C, 63°C, or 65°C, but is not limited thereto and may be appropriately adjusted by a person skilled in the art depending on the purpose.
- the appropriate stringency to hybridize the polynucleotide depends on the length of the polynucleotide and the degree of complementarity, variables that are well known in the art (e.g., J. Sambrook et al., supra).
- purine nucleotide specifically refers to 5'-inosine acid (5'-inosine monophosphate; hereinafter IMP), 5'-xanthosine monophosphate (5'-xanthosine monophosphate; hereinafter XMP), and 5'-guanic acid (5'-guanic acid). It may be any one or more nucleotides selected from the group consisting of '-guanosine monophosphate (hereinafter referred to as GMP).
- GMP '-guanosine monophosphate
- the IMP is a compound in which adenine is deaminated and means a nucleotide composed of one molecule each of hypoxanthine, ribose, and phosphate.
- the XMP refers to a nucleotide dehydrogenated from IMP. It can be synthesized from IMP by 5'-inosine-5'-monophosphate dehydrogenase.
- the GMP refers to a nucleotide having a structure in which a phosphate group forms an ester bond to the ribose portion of a guanosine molecule.
- the GMP can be synthesized by adding ammonia molecules to XMP by 5'-guanic acid biosynthetic enzyme (GMP synthase).
- GMP synthase 5'-guanic acid biosynthetic enzyme
- the method for producing GMP from XMP and/or the means used in the method may be selected from known techniques.
- microorganism includes both wild-type microorganisms and microorganisms that have undergone natural or artificial genetic modification, and can be caused by insertion of foreign genes or increased activity or inactivation of intrinsic genes. It is a microorganism in which a specific mechanism is weakened or increased, and may be a microorganism that includes genetic modification for the production of a desired polypeptide, protein, or product.
- microorganism and strain have the same meaning and can be used interchangeably without limitation.
- the microorganism of the present application may be a microorganism (e.g., a recombinant strain) in which the serine dehydratase protein activity is weakened compared to the intrinsic activity, but is not limited thereto.
- a microorganism e.g., a recombinant strain
- the serine dehydratase protein activity is weakened compared to the intrinsic activity, but is not limited thereto.
- microorganism having the ability to produce purine nucleotides refers to a prokaryotic or eukaryotic microbial strain capable of producing purine nucleotides within a living organism, a microorganism in which the ability to produce purine nucleotides is imparted to a parent strain that does not have the ability to produce purine nucleotides, or an intrinsic microorganism. Therefore, it can include all microorganisms that have the ability to produce purine nucleotides. The ability to produce purine nucleotides can be conferred or enhanced by species improvement.
- non-modified microorganism does not exclude strains containing mutations that may occur naturally in microorganisms, and is either a wild-type strain or a natural strain itself, or a strain that is transformed by genetic mutation due to natural or artificial factors. It may refer to the strain before change.
- non-transformed microorganism refers to “pre-transformed strain”, “pre-transformed microorganism”, “non-mutated strain”, “non-modified strain”, “non-mutated microorganism”, “pre-mutated parent strain”, “wild-type microorganism”, “ May be used interchangeably with “reference microorganism” or “reference microorganism.”
- the unmodified microorganism may refer to a strain in which the serine dehydratase protein activity of the present application is not weakened or is not weakened compared to the intrinsic activity, but is not limited thereto.
- the unmodified microorganism may be a microorganism containing an amino acid sequence consisting of SEQ ID NO: 66 or a polynucleotide consisting of SEQ ID NO: 67, but is not limited thereto.
- the microorganism of the present application may include all microorganisms in which the serine dehydratase protein activity is weakened compared to the intrinsic activity and can produce the desired purine nucleotide.
- the microorganism of the present application is characterized by increased purine nucleotide production ability by weakening the serine dehydratase protein activity compared to the intrinsic activity, and may be a genetically modified microorganism or a recombinant microorganism, but is not limited thereto. .
- the recombinant strain with increased purine nucleotide production ability may be a microorganism with increased purine nucleotide production ability compared to a natural wild-type microorganism or an unmodified microorganism with intrinsic activity of serine dehydratase protein, but is not limited thereto. .
- a microorganism having the ability to produce purine nucleotides is a prokaryotic or eukaryotic microbial strain capable of producing purine nucleotides within a living organism, and the weakened microbial strain of the present application is a microorganism that inherently has the ability to produce purine nucleotides or a parent strain that does not have the ability to produce purine nucleotides. It may include all microorganisms endowed with the ability to produce purine nucleotides due to serine dehydratase protein activity. The ability to produce purine nucleotides can be conferred or enhanced by species improvement.
- the “intrinsic activity” refers to the activity of a specific polypeptide originally possessed by the parent strain or unmodified microorganism before the change in trait when the trait changes due to genetic mutation caused by natural or artificial factors. This refers to the activity of “activity before modification” and Can be used interchangeably.
- weakening of polypeptide activity is a concept that includes both weakening of activity or absence of activity compared to intrinsic activity.
- the weakening may include deficiency, inactivation, deletion, disruption, down-regulation, decrease, attenuation, repression, reduction, etc.
- the terms may be used interchangeably.
- the weakening may mean that the protein is active but not completely inactivated by deletion, and the protein's activity is weakened compared to the unmodified microorganism, wild-type strain, or parent strain, but is limited to this. It doesn't work.
- the weakening may be, but is not limited to, inactivation.
- the inactivation may mean that the protein is not expressed at all compared to the parent strain or a strain in which the protein consisting of the amino acid sequence of SEQ ID NO: 66 is not modified, or even if expressed, its activity is absent or weakened.
- the weakening occurs when the activity of the polypeptide itself is weakened or eliminated compared to the activity of the polypeptide originally possessed by the microorganism due to mutation of the polynucleotide encoding the polypeptide, inhibition of expression of the gene encoding the polypeptide, or translation into a polypeptide. This may also include cases where the overall level of polypeptide activity within the cell is lower than that of the natural strain due to inhibition, etc., cases where the gene is not expressed at all, and cases where there is no polypeptide activity even when the gene is expressed.
- the fact that the activity of a polypeptide is weakened compared to the intrinsic activity means that it is lowered compared to the activity of a specific polypeptide originally possessed by the parent strain or unmodified microorganism before the transformation.
- the weakening of the activity of the polypeptide can be confirmed by weakening the degree of activity of the polypeptide, the expression level, or the amount of product released from the polypeptide.
- the weakening is such that the activity of the serine dehydratase protein is less than about 100%, about 90% or less, about 80% or less, about 70% of the activity of the serine dehydratase protein of the parent strain or unmodified microorganism before the change in character.
- it may be about 60% or less, about 50% or less, about 40% or less, about 30% or less, about 20% or less, about 10% or less, about 5% or less, or 0%, but is not limited thereto.
- the inactivation may mean that the expression of the serine dehydratase protein is not expressed at all compared to an unmodified microorganism, or that even if it is expressed, the activity is absent or weakened.
- Attenuation of the activity of such a polypeptide may be performed by any method known in the art, but is not limited thereto, and may be achieved by applying various methods well known in the art (e.g., Nakashima N et al., Bacterial cellular engineering by genome editing and gene silencing. 2014;15(2):2773-2793, Molecular Cloning 2012, etc.
- Modification of the polynucleotide sequence encoding the polypeptide to eliminate or weaken the activity of the polypeptide e.g., one or more nucleic acids on the nucleotide sequence of the polypeptide gene to encode a polypeptide modified to eliminate or weaken the activity of the polypeptide) deletion/substitution/addition of base;
- antisense oligonucleotide eg, antisense RNA
- Deletion of part or all of the gene encoding the polypeptide may be removal of the entire polynucleotide encoding the target polypeptide endogenous in the chromosome, replacement with a polynucleotide with a partial nucleotide sequence deleted, or replacement with a marker gene.
- Methods for deleting part or all of these polynucleotides include deleting polynucleotides by homologous recombination using vectors for inserting chromosomes into microorganisms, inducing mutations using light such as ultraviolet rays or chemicals, and deleting the polynucleotides from the resulting mutants. This may be performed by selecting a strain lacking the target gene, but is not limited to this.
- the method for deleting part or all of the gene may include a method using DNA recombination technology.
- a nucleotide sequence or vector containing a nucleotide sequence homologous to the gene of interest is injected into the microorganism to cause homologous recombination, thereby causing deletion of part or the entire gene.
- the injected nucleotide sequence or vector may include, but is not limited to, a dominant selection marker.
- modification of the expression control sequence includes mutation in the expression control region (or expression control sequence) due to deletion, insertion, non-conservative or conservative substitution, or a combination thereof, or change to a sequence with weaker activity. It could be a replacement.
- the expression control region includes, but is not limited to, a promoter, an operator sequence, a sequence encoding a ribosome binding site, and a sequence that regulates the termination of transcription and translation.
- the modification of the amino acid sequence or polynucleotide sequence of 3) and 4) includes deletion, insertion, non-conservative or conservative substitution of the amino acid sequence of the polypeptide or the polynucleotide sequence encoding the polypeptide to weaken the activity of the polypeptide.
- a combination thereof may result in a mutation in the sequence, or a replacement with an amino acid sequence or polynucleotide sequence improved to have weaker activity, or an amino acid sequence or polynucleotide sequence improved to have no activity, but is not limited thereto.
- gene expression can be inhibited or weakened by introducing a mutation in the polynucleotide sequence to form a stop codon, but is not limited thereto.
- modification of the base sequence of the start codon or 5'-UTR region of the gene encoding the polypeptide may be, for example, substitution of another start codon with a lower polypeptide expression rate than the internal start codon. Not limited.
- antisense oligonucleotide e.g., antisense RNA
- antisense RNA binds complementary to the transcript of the gene encoding the polypeptide
- Weintraub, H. et al. Antisense-RNA as a molecular tool. for genetic analysis, Reviews - Trends in Genetics, Vol. 1(1) 1986].
- Modification of part or all of the polynucleotide in the microorganism of the present application is (a) homologous recombination using a vector for chromosome insertion into the microorganism or genome editing using engineered nuclease (e.g., CRISPR-Cas9) and/or (b) It may be induced by, but is not limited to, light and/or chemical treatment, such as ultraviolet rays and radiation.
- the method of modifying part or all of the gene may include a method using DNA recombination technology.
- a nucleotide sequence or vector containing a nucleotide sequence homologous to the gene of interest is injected into the microorganism to cause homologous recombination, thereby causing deletion of part or the entire gene.
- the injected nucleotide sequence or vector may include, but is not limited to, a dominant selection marker.
- the recombinant microorganism having the ability to produce purine nucleotides of the present application may include all microorganisms that can produce purine nucleotides by being transformed through a vector and weakening the serine dehydratase protein activity of the present application.
- the vector of the present application may include a DNA preparation containing the base sequence of a polynucleotide encoding the target polypeptide operably linked to a suitable expression control region (or expression control sequence) to enable expression of the target polypeptide in a suitable host.
- the expression control region may include a promoter capable of initiating transcription, an optional operator sequence for regulating such transcription, a sequence encoding a suitable mRNA ribosome binding site, and a sequence regulating termination of transcription and translation.
- the vector After transformation into a suitable host cell, the vector can replicate or function independently of the host genome and can be integrated into the genome itself.
- the vector used in this application is not particularly limited, and any vector known in the art can be used.
- Examples of commonly used vectors include plasmids, cosmids, viruses, and bacteriophages in a natural or recombinant state.
- pWE15, M13, MBL3, MBL4, IXII, ASHII, APII, t10, t11, Charon4A, and Charon21A can be used as phage vectors or cosmid vectors, and pDZ-based, pBR-based, and pUC-based plasmid vectors can be used.
- pBluescriptII series pGEM series
- pTZ series pCL series
- pSK series pSKH series
- pET series pET series
- pDZ pDC, pDCM2, pACYC177, pACYC184, pCL, pSK, pSKH130, pECCG117, pUC19, pBR322, pMW118, pCC1BAC vectors, etc.
- a polynucleotide encoding a target polypeptide can be inserted into a chromosome using a vector for intracellular chromosome insertion. Insertion of the polynucleotide into the chromosome may be accomplished by any method known in the art, for example, homologous recombination, but is not limited thereto.
- a selection marker may be additionally included to confirm whether the chromosome has been inserted. The selection marker is used to select cells transformed with a vector, that is, to confirm the insertion of the target nucleic acid molecule, and to display selectable phenotypes such as drug resistance, auxotrophy, resistance to cytotoxic agents, or expression of surface polypeptides. Markers that provide may be used. In an environment treated with a selective agent, only cells expressing the selection marker survive or show other expression traits, so transformed cells can be selected.
- the term “transformation” refers to introducing a vector containing a polynucleotide encoding a target polypeptide into a host cell or microorganism so that the polypeptide encoding the polynucleotide can be expressed within the host cell.
- the transformed polynucleotide can include both of these, regardless of whether it is inserted into the chromosome of the host cell or located outside the chromosome.
- the polynucleotide includes DNA and/or RNA encoding the polypeptide of interest.
- the polynucleotide can be introduced in any form as long as it can be introduced and expressed into a host cell.
- the polynucleotide can be introduced into the host cell in the form of an expression cassette, which is a genetic structure containing all elements necessary for self-expression.
- the expression cassette may typically include a promoter, a transcription termination signal, a ribosome binding site, and a translation termination signal that are operably linked to the polynucleotide.
- the expression cassette may be in the form of an expression vector capable of self-replication.
- the polynucleotide may be introduced into the 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 refers to a configuration in which a control sequence is placed in an appropriate position so that the control sequence directs the expression of the coding sequence.
- operably linked means that a regulatory region of a functional domain with known or desired activity, such as a promoter, terminator, signal sequence, or enhancer region, controls the expression, secretion, or function of a target (gene or polypeptide). It includes being attached to or connected to the target so that it can be adjusted according to the desired activity.
- the polynucleotide sequence is functionally linked to a promoter sequence that initiates and mediates transcription of the polynucleotide encoding the target variant polypeptide of the present application.
- expression includes, but is not limited to, any step involved in the production of a polypeptide, such as transcription, post-transcriptional modification, translation, post-translational modification, and secretion.
- expression vector refers to a linear or circular nucleic acid molecule containing a coding sequence and a regulatory sequence operably linked for expression thereof.
- regulatory sequence refers to a polynucleotide sequence required for the expression of a coding sequence.
- Each regulatory sequence may be native (identical in origin) or foreign (derived from a different gene) to the coding sequence.
- the regulatory sequences include a leader sequence, a polyadenylation sequence, a propeptide sequence, a promoter, a signal peptide sequence, an operator sequence, a sequence encoding a ribosome binding site, and a sequence that regulates transcription and translation termination. Includes sequence.
- the minimum unit of the regulatory sequence may include a promoter, transcription and translation termination sequences.
- the term "recombinant" in this application means that a cell, polynucleotide, polypeptide, or vector is modified by introduction of a heterologous nucleic acid or polypeptide or alteration of a native polynucleotide or polypeptide. means that the cell is derived from a cell that has been so modified.
- a recombinant cell may express genes not found within the native (non-recombinant) form of the cell, or may express native genes that are expressed or not expressed at all, or are otherwise abnormally expressed.
- the microorganism that produces the purine nucleotide is a protein consisting of the amino acid sequence of SEQ ID NO: 66, or at least 60%, 70%, 75%, 80%, 85%, 90%, 95%, 96 of SEQ ID NO: 66. It may be a microorganism that inherently contains a protein consisting of an amino acid sequence having more than %, 97%, 98%, 99%, 99.5%, 99.7% or 99.9% homology or identity.
- the microorganism that produces the purine nucleotide is a polynucleotide sequence capable of encoding a protein containing an amino acid sequence with at least 80% homology to SEQ ID NO: 66, the base sequence of SEQ ID NO: 67, or SEQ ID NO: 67 Homology or identity with the base sequence is 60% or more, 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 95% or more, 96% or more, 97% or more, 98% or more, and It may be a microorganism that inherently contains less than 100% of its base sequence.
- microorganisms of the present application may include all microorganisms whose serine dehydratase protein activity has been weakened compared to the intrinsic activity by various known methods.
- the microorganism whose serine dehydratase protein activity of the present application is weakened compared to the intrinsic activity may be a microorganism in which the polynucleotide encoding the serine dehydratase protein is missing or modified, but is not limited thereto. Specifically, it may be a microorganism that lacks serine dehydratase protein activity due to a deletion in the base sequence of SEQ ID NO: 67, but is not limited thereto.
- the microorganism with an increased ability to produce purine nucleotides in the present application may be a microorganism with an increased ability to produce purine nucleotides compared to an unmodified microorganism, but is not limited thereto.
- the unmodified microorganism that is the target strain for comparing the increase in purine nucleotide production ability may be the CJX1664 strain or the KCCM12151P strain, but is not limited thereto.
- the microorganism with an increased purine nucleotide production ability is about 1% or more, specifically about 1% or more, about 2.5% or more, about 5% or more, about 1% or more compared to the purine nucleotide production ability of the parent strain or unmodified microorganism before mutation. 6% or more, about 7% or more, about 8% or more, about 9% or more, about 10% or more, about 15% or more, about 20% or more, about 25% or more, about 30% or more, or about 35% or more ( The upper limit is not particularly limited and may be, for example, about 200% or less, about 150% or less, about 100% or less, about 50% or less, about 45% or less, or about 40% or less), but may be increased.
- the recombinant strain with increased purine nucleotide production ability has a purine nucleotide production ability of about 1.1 times or more, about 1.15 times or more, about 1.2 times or more, about 1.25 times or more, or about 1.2 times or more than the parent strain or unmodified microorganism before mutation.
- the upper limit is not particularly limited and may be, for example, about 10 times or less, about 5 times or less, about 3 times or less, about 2 times or less, about 1.5 times or less, or about 1.4 times or less) It may be increased, but is not limited to this.
- the microorganism having the ability to produce purine nucleotides may be either a prokaryotic cell or a eukaryotic cell, but may specifically be a prokaryotic cell.
- the prokaryotic cells are, for example, Escherichia sp., Erwinia sp., Serratia sp., Providencia sp., and Corynebacterium genus.
- Corynebacteria sp. Pseudomonas sp., Leptospira , Salmonella sp., Brevibacteria sp., Hypomononas sp., Chromobacter Microorganism strains belonging to the genus Chromobacterium sp. and Norcardia sp., or fungi or yeast may be included. Specifically, they are microbial strains and yeast of the genus Escherichia, Corynebacterium, and Leptospira. More specifically, it may be a microbial strain of the genus Corynebacterium .
- the microorganism of the present application may be a microorganism of the genus Corynebacterium.
- the microorganism of the present application is Corynebacterium stationis, Corynebacterium glutamicum , Corynebacterium crudilactis , Corynebacterium Corynebacterium deserti, Corynebacterium efficiens , Corynebacterium callunae , Corynebacterium singulare , Corynebacterium halotolerans ( Corynebacterium halotolerans ), Corynebacterium striatum , Corynebacterium ammoniagenes , Corynebacterium pollutisoli , Corynebacterium imitans , Corynebacterium testudinoris or Corynebacterium flavescens.
- the microorganism of the present application may be a microorganism of the genus Corynebacterium, more specifically Corynebacterium stationis or Corynebacterium glutamicum , but is
- the microorganism having purine nucleotide production ability of the present application may be a microorganism with improved purine nucleotide production ability by controlling the activity of any one or more proteins selected from the group consisting of (a) to (d) below, but is limited thereto. no:
- the term “increase” of polypeptide activity means that the activity of the polypeptide is enhanced compared to the intrinsic activity.
- the enhancement may be used interchangeably with terms such as activation, up-regulation, overexpression, and enhancement.
- the enhancement may include showing an activity that it did not originally have, or showing improved activity compared to the intrinsic activity or activity before modification.
- the term “exhibiting an activity that it did not originally have” may mean “introduction of a protein,” but is not limited thereto.
- the introduction of the protein means that a gene that the microorganism did not originally possess is expressed within the microorganism, thereby causing the activity of a specific protein to appear, or to exhibit enhanced or improved activity compared to the intrinsic activity or activity before modification of the protein. do.
- a polynucleotide encoding a specific protein may be introduced into a chromosome within a microorganism, or a vector containing a polynucleotide encoding a specific protein may be introduced into the microorganism to exhibit its activity.
- the “intrinsic activity” refers to the activity of a specific polypeptide originally possessed by the parent strain or unmodified microorganism before the change in trait when the trait changes due to genetic mutation caused by natural or artificial factors. This refers to the activity of “activity before modification” and Can be used interchangeably.
- Enhancing the activity of a polypeptide compared to the intrinsic activity means that it is improved compared to the activity and/or concentration (expression amount) of a specific polypeptide originally possessed by the parent strain or unmodified microorganism before the change.
- the enhancement may indicate the absence of activity of the corresponding protein, or its activity or concentration may be reduced by about 1%, about 10%, or about 1%, based on the activity or concentration of the wild-type protein or the initial microbial strain. It may be strengthened by 25%, about 50%, about 75%, about 100%, about 150%, about 200%, about 300%, about 400% or about 500%, up to about 1000% or about 2000% or more. , but is not limited to this.
- Enhancement of the activity of the polypeptide can be achieved by introducing a foreign polypeptide or enhancing the activity of an endogenous polypeptide. Whether the activity of the polypeptide is enhanced can be confirmed by strengthening the activity level of the polypeptide, the expression level, or the amount of product released from the polypeptide.
- Enhancement of the activity of the polypeptide can be done by applying various methods well known in the art, and is not limited as long as the activity of the target polypeptide can be enhanced compared to that of the microorganism before modification.
- genetic engineering and/or protein engineering well known to those skilled in the art, which are routine methods of molecular biology, may be used, but are not limited thereto (e.g., Sitnicka et al. Functional Analysis of Genes. Advances in Cell Biology 2010, Vol. 2. 1-16, Molecular Cloning 2012, etc.
- modification of the polynucleotide sequence encoding the polypeptide to enhance the activity of the polypeptide e.g., modification of the polynucleotide sequence of the polypeptide gene to encode a polypeptide modified to enhance the activity of the polypeptide;
- Enhancement of the copy number in the cell of the polynucleotide encoding the polypeptide may be due to the introduction into the host cell of a vector capable of replicating and functioning independently of the host to which the polynucleotide encoding the polypeptide is operably linked. .
- one or more copies of the polynucleotide encoding the polypeptide may be introduced into the chromosome of the host cell.
- the introduction into the chromosome may be performed by introducing a vector capable of inserting the polynucleotide into the chromosome of the host cell into the host cell, but is not limited to this.
- the vector is the same as described above.
- the expression control region is not particularly limited thereto, but may include a promoter, an operator sequence, a sequence encoding a ribosome binding site, and a sequence that regulates the termination of transcription and translation.
- the original promoter may be replaced with a strong promoter, but the method is not limited thereto.
- Examples of known strong promoters include cj1 to cj7 promoters (US Patent US 7662943 B2), lac promoter, trp promoter, trc promoter, tac promoter, lambda phage PR promoter, PL promoter, tet promoter, gapA promoter, SPL7 promoter, SPL13. (sm3) promoter (US Patent US 10584338 B2), O2 promoter (US Patent US 10273491 B2), tkt promoter, yccA promoter, etc., but is not limited thereto.
- modification of the base sequence of the start codon or 5'-UTR region of the gene encoding the polypeptide may, for example, be substitution of another start codon with a higher polypeptide expression rate than the internal start codon, but is not limited thereto. No.
- the modification of the amino acid sequence or polynucleotide sequence of 4) and 5) includes deletion, insertion, non-conservative or conservative substitution of the amino acid sequence of the polypeptide or the polynucleotide sequence encoding the polypeptide to enhance the activity of the polypeptide.
- the combination of these may result in a mutation in the sequence, or a replacement with an amino acid sequence or polynucleotide sequence improved to have stronger activity, or an amino acid sequence or polynucleotide sequence improved to enhance activity, but is not limited thereto.
- the replacement may be specifically performed by inserting a polynucleotide into a chromosome by homologous recombination, but is not limited thereto.
- the vector used at this time may additionally include a selection marker to check whether chromosome insertion has occurred.
- the selection marker is as described above.
- Introduction of a foreign polynucleotide showing the activity of the polypeptide may be introduction into the host cell of a foreign polynucleotide encoding a polypeptide showing the same/similar activity as the polypeptide. There are no restrictions on the origin or sequence of the foreign polynucleotide as long as it exhibits the same/similar activity as the polypeptide.
- the method used for the introduction can be performed by a person skilled in the art by appropriately selecting a known transformation method, and by expressing the introduced polynucleotide in the host cell, a polypeptide can be produced and its activity can be enhanced.
- Codon optimization of the polynucleotide encoding the polypeptide is codon optimization of the native polynucleotide to enhance transcription or translation within the host cell, or optimized transcription and translation of the foreign polynucleotide within the host cell. It may be that the codons have been optimized to allow this.
- Such enhancement of polypeptide activity may mean that the activity or concentration of the corresponding polypeptide is enhanced based on the activity or concentration of the polypeptide expressed in a wild-type or unmodified microbial strain, or the amount of product produced from the polypeptide may be increased. However, it is not limited to this.
- the microorganism having purine nucleotide production ability of the present application may be a microorganism with improved purine nucleotide production ability due to weakened formic acid dehydrogenase protein activity compared to the intrinsic activity, but is not limited thereto.
- formate dehydrogenase refers to formic acid dehydrogenase subunit 1 (Fdh subunit 1), formic acid dehydrogenase subunit 2 (Fdh subunit 2), and formic acid dehydrogenase subunit 3 (Fdh subunit 3). It is an enzyme that uses formic acid as a substrate to catalyze an oxidation reaction to reduce NAD + and produce NADH and CO 2 .
- the formic acid dehydrogenase of the present application is selected from the group consisting of formic acid dehydrogenase subunit 1 (Fdh subunit 1), formic acid dehydrogenase subunit 2 (Fdh subunit 2), and formic acid dehydrogenase subunit 3 (Fdh subunit 3). It may be one or more proteins, but is not limited thereto.
- the formic acid dehydrogenase of the present application refers to the complex of formic acid dehydrogenase subunit 1 (Fdh subunit 1), formic acid dehydrogenase subunit 2 (Fdh subunit 2), and formic acid dehydrogenase subunit 3 (Fdh subunit 3). It can be used, and can be used interchangeably with Fdh.
- the " fdh gene” of the present application may be used to mean a gene encoding the formic acid dehydrogenase of the present application, which consists of the fdh 1, fdh 2, and fdh 3 genes.
- the fdh gene of the present application is a complex of formic acid dehydrogenase subunit 1 (Fdh subunit 1), formic acid dehydrogenase subunit 2 (Fdh subunit 2), and formic acid dehydrogenase subunit 3 (Fdh subunit 3) complex of the present application. ) can be used to mean a gene that encodes.
- the formic acid dehydrogenase of the present application includes formic acid dehydrogenase subunit 1 (Fdh subunit 1), formic acid dehydrogenase subunit 2 (Fdh subunit 2), and formic acid encoded by the fdh 1, fdh 2, and fdh 3 genes, respectively. It may be a protein having dehydrogenase subunit 3 (Fdh subunit 3) activity, but the type is not particularly limited as long as it has activity corresponding to formic acid dehydrogenase.
- Formic acid dehydrogenase subunit 1 (Fdh subunit 1)
- formic acid dehydrogenase subunit 2 (Fdh subunit 2)
- formic acid dehydrogenase subunit 3 (Fdh subunit 3) encoded by the fdh 1, fdh 2, and fdh 3 genes, respectively.
- Fdh subunit 1 formic acid dehydrogenase subunit 1
- Fdh subunit 2 formic acid dehydrogenase subunit 2
- Fdh subunit 3 formic acid dehydrogenase subunit 3
- Polynucleotide sequences can be obtained from known databases, examples of which include, but are not limited to, NCBI's GenBank.
- the formic acid dehydrogenase subunit 1 (Fdh subunit 1), formic acid dehydrogenase subunit 2 (Fdh subunit 2), and formic acid dehydrogenase subunit 3 (Fdh subunit 3) are SEQ ID NO: 68, SEQ ID NO: 70, and It may include the amino acid sequence of SEQ ID NO: 72 or an amino acid sequence with more than 60% homology or identity thereto, but is not limited thereto, as long as it has formic acid dehydrogenase protein activity.
- polypeptides having formic acid dehydrogenase subunit 1 (Fdh subunit 1), formic acid dehydrogenase subunit 2 (Fdh subunit 2), and formic acid dehydrogenase subunit 3 (Fdh subunit 3) activities are SEQ ID NO: 68 and SEQ ID NO: 70, and SEQ ID NO: 72, or at least 60%, 70%, 80%, 85%, 90%, 95%, 96%, 97%, 98% of SEQ ID NO: 68, SEQ ID NO: 70, and SEQ ID NO: 72, respectively, Alternatively, it may have, include, consist of, or essentially consist of an amino acid sequence having at least 99% homology or identity.
- the formic acid dehydrogenase subunit 1 (Fdh subunit 1), formic acid dehydrogenase subunit 2 (Fdh subunit 2), and formic acid dehydrogenase subunit 3 (Fdh subunit 3) proteins are microorganisms of the genus Corynebacterium or Corynebacterium. It may refer to a protein that is inherently present in Bacteria stationis, but is not limited thereto, and specifically, the amino acid of SEQ ID NO: 68, which is inherently present in Corynebacterium genus microorganisms or Corynebacterium stationis.
- Formic acid dehydrogenase subunit 1 (Fdh subunit 1) protein consisting of the sequence
- formic acid dehydrogenase subunit 2 (Fdh subunit 2) protein consisting of the amino acid sequence of SEQ ID NO: 70
- formic acid dehydrogenase subunit consisting of the amino acid sequence of SEQ ID NO: 72 3 (Fdh subunit 3) protein, but is not limited thereto.
- the base sequence encoding the formic acid dehydrogenase may be a base sequence encoding a protein showing the activity of formic acid dehydrogenase.
- the base sequences encoding formic acid dehydrogenase subunit 1 (Fdh subunit 1), formic acid dehydrogenase subunit 2 (Fdh subunit 2), and formic acid dehydrogenase subunit 3 (Fdh subunit 3) have formic acid dehydrogenase activity. It may be a base sequence encoding a protein representing .
- Formic acid dehydrogenase subunit 1 (Fdh subunit 1), formic acid dehydrogenase subunit 2 (Fdh subunit 2) and formic acid dehydrogenase subunit 3 ( Fdh subunit 3) has at least 60%, 70% or more homology or identity with the sequences of SEQ ID NO: 69, SEQ ID NO: 71, and SEQ ID NO: 73, respectively, or with the sequences of SEQ ID NO: 69, SEQ ID NO: 71, and SEQ ID NO: 73, respectively; It has or includes at least 75%, at least 80%, at least 85%, at least 90%, at least 95%, at least 96%, at least 97%, at least 98%, and less than 100% of the base sequence, or consists of the above base sequence.
- nucleotide sequences of SEQ ID NO: 69, SEQ ID NO: 71, and SEQ ID NO: 73, respectively, can be obtained from known databases, examples of which include NCBI's GenBank, but are not limited thereto.
- the microorganism having the ability to produce purine nucleotides of the present application may be a microorganism in which the glycine decomposition enzyme protein activity is enhanced compared to the intrinsic activity, and the purine nucleotide production ability is improved, but is not limited thereto.
- the term “glycine decomposition enzyme protein” refers to a protein that is directly or indirectly involved in the glycine decomposition pathway, and refers to each protein constituting the glycine decomposition system, a complex of the proteins, or the glycine decomposition system itself.
- the glycine decomposition enzyme protein includes T-protein (GcvT), P-protein (GcvP), L-protein (GcvL), H-protein (GcvH), and It may be any one or more proteins selected from the group consisting of LipB and LipA, which are coenzymes of the glycine decomposition system, but is not limited thereto (John E. Cronan, Microbiology and Molecular Biology Reviews., 13 April 2016).
- Degradative enzyme proteins can be used interchangeably with GcvPTH or glycine cleavage systems.
- GCV glycine cleavage system
- the glycine degrading enzyme protein of the present application may be a protein having GcvP, GcvT, and GcvH protein activities encoded by the gcvP, gcvT, and gcvH genes, respectively.
- the type is not particularly limited to.
- GcvP, GcvT and GcvH proteins encoded by the gcvP, gcvT and gcvH genes, respectively, are known in the art, and the amino acid and polynucleotide sequences of each of the GcvP, GcvT and GcvH proteins can be obtained from known databases, Examples include, but are not limited to, NCBI's GenBank.
- the GcvP, GcvT, and GcvH proteins may include amino acid sequences of SEQ ID NO: 74, SEQ ID NO: 76, and SEQ ID NO: 78, respectively, or amino acid sequences with more than 60% homology or identity thereto. , as long as it has glycine decomposition enzyme protein activity, but is not limited thereto.
- the polypeptides having GcvP, GcvT and GcvH protein activities are SEQ ID NO: 74, SEQ ID NO: 76, and SEQ ID NO: 78, respectively, or at least 60%, 70%, 80% of SEQ ID NO: 74, SEQ ID NO: 76, and SEQ ID NO: 78, respectively.
- the GcvP, GcvT, and GcvH proteins may refer to proteins inherently present in Corynebacterium genus microorganisms or Corynebacterium stasis, but are not limited thereto, and specifically, Corynebacterium It may be the GcvP protein consisting of the amino acid sequence of SEQ ID NO: 74, the GcvT protein consisting of the amino acid sequence of SEQ ID NO: 76, and the GcvH protein consisting of the amino acid sequence of SEQ ID NO: 78, which are inherently present in the genus microorganism or Corynebacterium stationanis. , but is not limited to this.
- the base sequences encoding the GcvP, GcvT, and GcvH proteins may be base sequences encoding proteins that exhibit the activity of glycine decomposition enzyme protein.
- the GcvP, GcvT, and GcvH proteins having the amino acid sequences of SEQ ID NO: 74, SEQ ID NO: 76, and SEQ ID NO: 78, respectively have the sequences of SEQ ID NO: 75, SEQ ID NO: 77, and SEQ ID NO: 79, respectively, or SEQ ID NO: 75, sequence, respectively.
- the nucleotide sequences of SEQ ID NO: 75, SEQ ID NO: 77, and SEQ ID NO: 79, respectively can be obtained from known databases, examples of which include NCBI's GenBank, but are not limited thereto.
- the microorganism having the ability to produce purine nucleotides of the present application may be a microorganism in which the serine hydroxymethyltransferase protein activity is further enhanced compared to the intrinsic activity, and the purine nucleotide production ability is improved, but is limited thereto. no.
- the term “Serine Hydroxymethyltransferase” is an enzyme that catalyzes the conversion of serine to glycine.
- the serine hydroxymethyltransferase of this application can be used interchangeably with GlyA.
- the serine hydroxymethyltransferase of the present application may be a protein having serine hydroxymethyltransferase activity encoded by the glyA gene, but if it has an activity corresponding to serine hydroxymethyltransferase, There is no particular limitation to the type.
- the serine hydroxymethyltransferase encoded by the glyA gene is known in the art, and the amino acid and polynucleotide sequences of the serine hydroxymethyltransferase can be obtained from known databases, such as NCBI's GenBank. etc., but is not limited thereto.
- the serine hydroxymethyltransferase protein may include the amino acid sequence of SEQ ID NO: 80 or an amino acid sequence with more than 60% homology or identity thereto, but serine hydroxymethyltransferase As long as it has lase protein activity, it is not limited thereto.
- the polypeptide having serine hydroxymethyltransferase protein activity is SEQ ID NO: 80 or at least 60%, 70%, 80%, 85%, 90%, 95%, 96%, 97% of SEQ ID NO: 80, It may have, include, consist of, or consist essentially of an amino acid sequence having 98%, or 99% or more homology or identity.
- the serine hydroxymethyltransferase protein may refer to a protein inherently present in Corynebacterium genus microorganisms or Corynebacterium stasis, but is not limited thereto, and specifically, Corynebacterium stasis. It may be, but is not limited to, a serine hydroxymethyltransferase protein consisting of the amino acid sequence of SEQ ID NO: 80, which is inherently present in Bacteria microorganisms or Corynebacterium stasis.
- the base sequence encoding the serine hydroxymethyltransferase may be a base sequence encoding a protein showing the activity of serine hydroxymethyltransferase.
- the serine hydroxymethyltransferase protein having the amino acid sequence of SEQ ID NO: 80 has at least 60%, 70%, or 75% homology or identity with the sequence of SEQ ID NO: 81 or the sequence of SEQ ID NO: 81. , 80% or more, 85% or more, 90% or more, 95% or more, 96% or more, 97% or more, 98% or more, and less than 100% of the base sequence, consists of or is essentially the base sequence. It may be encoded by a polynucleotide, but is not limited thereto.
- the nucleotide sequence of SEQ ID NO: 81 can be obtained from known databases, examples of which include NCBI's GenBank, but are not limited thereto.
- the microorganism having the ability to produce purine nucleotides of the present application may be a microorganism in which the formate-dependent phosphoribosylglycinamide formyl transferase protein activity is enhanced compared to the intrinsic activity, and the purine nucleotide production ability is improved. It is not limited to this.
- formate-dependent phosphoribosylglycinamide formyltransferase refers to 10-formyltetrahydrofolate + N1-(5-phospho-D-ribosyl)glycinamide ⁇ tetrahydrofolate + N2-formyl-N1 -(5-phospho-D-ribosyl)glycinamide has the activity of catalyzing chemical reactions.
- the formate-dependent phosphoribosylglycinamide formyl transferase of the present application can be used interchangeably with PurT.
- the formate-dependent phosphoribosylglycinamide formyltransferase of the present application may be a protein having formate-dependent phosphoribosylglycinamide formyltransferase activity encoded by the purT gene, but the formate-dependent phosphoribosylglycinamide formyltransferase There is no particular limitation to the type as long as it has an activity corresponding to amide formyl transferase.
- the formate-dependent phosphoribosylglycinamide formyltransferase encoded by the purT gene is known in the art, and the amino acid and polynucleotide sequences of the formate-dependent phosphoribosylglycinamide formyltransferase can be obtained from known databases. Examples include NCBI's GenBank, but are not limited thereto.
- the formate-dependent phosphoribosylglycinamide formyl transferase protein may include the amino acid sequence of SEQ ID NO: 82 or an amino acid sequence with more than 60% homology or identity thereto, but the formate It is not limited thereto, as long as it has dependent phosphoribosylglycinamide formyl transferase protein activity.
- the polypeptide having formate-dependent phosphoribosylglycinamide formyl transferase protein activity is SEQ ID NO: 82 or at least 60%, 70%, 80%, 85%, 90%, 95%, 96% of SEQ ID NO: 82.
- the formate-dependent phosphoribosylglycinamide formyl transferase protein may refer to a protein inherently present in Corynebacterium genus microorganisms or Corynebacterium stasis, but is not limited thereto, and is specifically It may be, but is not limited to, a formate-dependent phosphoribosylglycinamide formyl transferase protein consisting of the amino acid sequence of SEQ ID NO: 82, which is inherently present in Corynebacterium genus microorganisms or Corynebacterium stasis.
- the base sequence encoding the formate-dependent phosphoribosylglycinamide formyltransferase may be a base sequence encoding a protein showing the activity of the formate-dependent phosphoribosylglycinamide formyltransferase.
- the formate-dependent phosphoribosylglycinamide formyl transferase protein having the amino acid sequence of SEQ ID NO: 82 has at least 60%, 70% or more homology or identity with the sequence of SEQ ID NO: 83 or the sequence of SEQ ID NO: 83. , 75% or more, 80% or more, 85% or more, 90% or more, 95% or more, 96% or more, 97% or more, 98% or more, and less than 100% of the nucleotide sequence, or consists of the nucleotide sequence. It may be encoded by a polynucleotide or may be essentially composed of polynucleotides, but is not limited thereto. Additionally, the nucleotide sequence of SEQ ID NO: 83 can be obtained from known databases, examples of which include NCBI's GenBank, but are not limited thereto.
- the microorganism having the ability to produce purine nucleotides of the present application has a serine dehydratase protein activity weakened compared to the intrinsic activity, and a serine hydroxymethyltransferase protein activity compared to the intrinsic activity. It may be a microorganism with enhanced purine nucleotide production ability, but is not limited thereto.
- the microorganism having the ability to produce purine nucleotides of the present application has a serine dehydratase protein activity weakened compared to the intrinsic activity, and a serine hydroxymethyltransferase protein activity compared to the intrinsic activity. It may be a microorganism with improved purine nucleotide production ability due to enhanced glycine decomposition enzyme protein activity compared to the intrinsic activity, but is not limited thereto.
- the microorganism having the ability to produce purine nucleotides of the present application has a serine dehydratase protein activity weakened compared to the intrinsic activity, and a serine hydroxymethyltransferase protein activity compared to the intrinsic activity.
- the glycine degrading enzyme protein activity is enhanced compared to the intrinsic activity
- the formic acid dehydrogenase protein activity is weakened compared to the intrinsic activity
- the formate-dependent phosphoribosylglycinamide formyl transferase protein activity is enhanced compared to the intrinsic activity, It may be a microorganism with improved purine nucleotide production ability, but is not limited thereto.
- Another aspect of the present application provides a method for producing purine nucleotides, comprising culturing a microorganism in a medium in which the serine dehydratase protein activity of the present application is weakened compared to the intrinsic activity.
- the term “culturing” means growing the strain of the present application under appropriately controlled environmental conditions.
- the culture process of the present application can be carried out according to appropriate media and culture conditions known in the art. This culture process can be easily adjusted and used by a person skilled in the art depending on the strain selected. Specifically, the culture may be batch, continuous, and/or fed-batch, but is not limited thereto.
- the term "medium” refers to a material that is mainly mixed with nutrients necessary for cultivating the microorganisms of this application, and supplies nutrients and growth factors, including water, which are essential for survival and development.
- the medium and other culture conditions used for cultivating the strain of the present application can be any medium used for cultivating ordinary microorganisms without particular limitation, but the microorganism of the present application can be grown with an appropriate carbon source, nitrogen source, personnel, and inorganic substances. It can be cultured under aerobic conditions in a typical medium containing compounds, amino acids, and/or vitamins while controlling temperature, pH, etc.
- culture media for strains of the genus Corynebacterium can be found in the literature ["Manual of Methods for General Bacteriology” by the American Society for Bacteriology (Washington D.C., USA, 1981).
- the carbon source includes carbohydrates such as glucose, saccharose, lactose, fructose, sucrose, maltose, etc.; Sugar alcohols such as mannitol, sorbitol, etc., organic acids such as pyruvic acid, lactic acid, citric acid, etc.; Amino acids such as glutamic acid, methionine, lysine, etc. may be included.
- natural organic nutrient sources such as starch hydrolyzate, molasses, blackstrap molasses, rice bran, cassava, bagasse and corn steep liquor can be used, specifically glucose and sterilized pre-treated molasses (i.e. converted to reducing sugars).
- Carbohydrates such as molasses
- various other carbon sources in an appropriate amount can be used without limitation. These carbon sources may be used alone or in combination of two or more types, but are not limited thereto.
- the nitrogen source includes inorganic nitrogen sources such as ammonia, ammonium sulfate, ammonium chloride, ammonium acetate, ammonium phosphate, anmonium carbonate, and ammonium nitrate; Organic nitrogen sources such as amino acids such as glutamic acid, methionine, and glutamine, peptone, NZ-amine, meat extract, yeast extract, malt extract, corn steep liquor, casein hydrolyzate, fish or its decomposition products, defatted soybean cake or its decomposition products, etc. can be used These nitrogen sources may be used individually or in combination of two or more types, but are not limited thereto.
- inorganic nitrogen sources such as ammonia, ammonium sulfate, ammonium chloride, ammonium acetate, ammonium phosphate, anmonium carbonate, and ammonium nitrate
- Organic nitrogen sources such as amino acids such as glutamic acid, methionine, and glutamine, peptone, NZ-amine, meat extract, yeast
- the agent may include monopotassium phosphate, dipotassium phosphate, or a corresponding sodium-containing salt.
- Inorganic compounds may include sodium chloride, calcium chloride, iron chloride, magnesium sulfate, iron sulfate, manganese sulfate, calcium carbonate, etc.
- amino acids, vitamins, and/or appropriate precursors may be included. These components or precursors can be added to the medium batchwise or continuously. However, it is not limited to this.
- compounds such as ammonium hydroxide, potassium hydroxide, ammonia, phosphoric acid, sulfuric acid, etc. can be added to the medium in an appropriate manner to adjust the pH of the medium.
- foam generation can be suppressed by using an antifoaming agent such as fatty acid polyglycol ester.
- oxygen or oxygen-containing gas can be injected into the medium, or to maintain the anaerobic and microaerobic state, nitrogen, hydrogen, or carbon dioxide gas can be injected without gas injection, and is limited thereto. That is not the case.
- the culture temperature can be maintained at 27 to 37°C, specifically 30 to 33°C, and culture can be performed for about 20 to 120 hours, but is not limited thereto.
- the term "culture” means a culture solution, concentrated culture solution, dried product of the culture solution, culture filtrate, concentrated culture filtrate, or dried product of the culture filtrate obtained by culturing a specific microorganism in a culture medium, and the culture solution means containing specific microorganisms, and the culture filtrate substantially excludes specific microorganisms (here, substantially, meaning that specific microorganisms separated by filtration, etc. are excluded, meaning that microorganisms are completely excluded from the filtrate) It does not.) It means not including.
- the formulation of the culture is not limited, and may be, for example, a liquid, emulsion, or solid. Specifically, for the purposes of the present application, the culture may contain purine nucleotides.
- fertilization means that it is not a putrefaction reaction during the process in which microorganisms decompose organic matter using their own enzymes. Fermentation and putrefaction reactions proceed through similar processes, but when useful substances are produced as a result of decomposition, it is called fermentation, and when foul-smelling or harmful substances are produced, it is called putrefaction.
- the method of obtaining the fermented product from the strain is not particularly limited, and can be obtained according to a method commonly used in the relevant technical field or similar fields.
- the term "fermented product” refers not only to the fermented material itself, but also to the culture medium of the strain in which the strain and the culture coexist, the fermented product obtained by filtering the strain from the culture medium, and the sterilizing and filtering of the strain from the culture medium.
- fermented product an extract obtained from the fermented product or a culture medium containing the same, a diluted solution obtained by diluting the fermented product or an extract thereof, a concentrate, a dried product obtained by drying the fermented product or an extract thereof, and the cells of the strain collected and crushed. It includes all types of substances including fermented products generated from the above-mentioned strains, such as lysates.
- any culture conditions and culture methods known in the art can be used to culture microorganisms.
- This culture process can be easily adjusted and used by those skilled in the art according to the selected strain.
- Purine nucleotides produced by the culture of the present application may be secreted into the medium or remain within the cells.
- the purine nucleotide production method of the present application includes preparing the microorganism of the present application, preparing a medium for culturing the strain, or a combination thereof (in any order), For example, it may be additionally included before the culturing step.
- the purine nucleotide production method of the present application may further include the step of recovering the target substance, specifically purine nucleotides, from the cultured microorganism, a culture of the microorganism, a fermentation product of the microorganism, or the culture medium.
- the recovering step may be additionally included after the culturing step.
- the recovery may be to collect the desired purine nucleotide using a suitable method known in the art according to the microorganism culture method of the present application, such as a batch, continuous, or fed-batch culture method.
- a suitable method known in the art such as a batch, continuous, or fed-batch culture method.
- Various chromatographies such as chromatography, HPLC, or a combination of these methods can be used, and the target substance, specifically purine nucleotides, can be recovered from the medium or microorganism using a suitable method known in the art.
- the purine nucleotide production method of the present application may additionally include a purification step.
- the purification can be performed using a suitable method known in the art.
- the recovery step and the purification step are performed sequentially or discontinuously, simultaneously or integrated into one step, regardless of the order. It may be performed, but is not limited to this.
- Another aspect of the present application is purine nucleotide production comprising a microorganism in which the serine dehydratase protein activity of the present application is weakened compared to the intrinsic activity, a culture of the microorganism, a fermentation product of the microorganism, or a combination of two or more thereof.
- a composition for purine nucleotide production comprising a microorganism in which the serine dehydratase protein activity of the present application is weakened compared to the intrinsic activity, a culture of the microorganism, a fermentation product of the microorganism, or a combination of two or more thereof.
- composition of the present application may further comprise any suitable excipients commonly used in compositions for producing purine nucleotides, such excipients may be, for example, preservatives, wetting agents, dispersing agents, suspending agents, buffering agents, stabilizing agents, or isotonic agents. However, it is not limited to this.
- each component present in the composition of the present application may be included in a microbiologically effective amount, or in an amount that can be appropriately present in the composition for production.
- composition of the present application attenuation of serine dehydratase protein activity and purine nucleotides are the same as described in the other embodiments above.
- Another aspect of the present application provides the use of a microorganism in which the serine dehydratase protein activity of the present application is weakened compared to the intrinsic activity for producing purine nucleotides.
- Example 1 Production of sdaA-deficient microorganism and confirmation of XMP production ability
- Example 1-1 Construction of recombinant vector enhanced by sdaA deletion and glyA addition
- a strain lacking the endogenous gene sdaA of Corynebacterium stasis was created, and a strain was created adding the number of copies of the glyA gene to the sdaA gene position to show the effects of sdaA deletion and glyA addition enhancement in the XMP producing strain. I wanted to check.
- the vector for this was constructed as follows using the plasmid pDCM2 (Korea Publication No. 10-2020-0136813) for insertion and replacement of genes in the Corynebacterium chromosome.
- PCR was performed using the gDNA (genomic DNA) of wild-type Corynebacterium stasis ATCC6872 as a template, using primer pairs of sequences of SEQ ID NOs: 1 and 2 and primer pairs of sequences of SEQ ID NOs: 3 and 4, respectively. PCR was performed at 94°C for 5 minutes, followed by 30 cycles of 94°C for 30 seconds, 55°C for 30 seconds, and 72°C for 1 minute and 30 seconds, followed by 72°C for 5 minutes.
- the pDCM2 vector was treated with XbaI and the PCR product obtained above was fusion cloned. Fusion cloning used the In-Fusion® HD cloning kit (Clontech). The resulting plasmid was named pDCM2-del sdaA.
- PCR and cloning were performed in the same manner using primer pairs of sequences of SEQ ID NOs: 1 and 5, primer pairs of sequences of SEQ ID NOs: 6 and 7, and primer pairs of sequences of SEQ ID NOs: 8 and 4.
- the resulting plasmid was named pDCM2-del sdaA-Pn-glyA.
- sequences of the primers used for vector construction are as follows.
- Example 1-2 Construction of sdaA deletion and glyA additional enrichment strains
- Example 1-1 After transforming the two vectors prepared in Example 1-1 into Corynebacterium stationanis CJX1664 strain (KR 10-1950141 B1) by electroporation, selection medium containing 25 mg/L of kanamycin was added. Strains with vectors inserted into the chromosome were selected as primary candidates. Afterwards, in strains in which homologous recombination occurred, strains with a deletion of the sdaA gene were selected using the primer pair of SEQ ID NO: 1 and SEQ ID NO: 4, and the sdaA gene was deleted using the primer pair of SEQ ID NO: 9 and SEQ ID NO: 7, and the corresponding position A strain was selected in which the glyA gene linked to its own promoter was inserted.
- sequence number designation order 9 primer 5'- GTCAACGCGCACTTGGATCT-3'
- Example 1-3 Evaluation of XMP production capacity of sdaA deletion and glyA addition enrichment strains
- the XMP production ability of the strain and parent strain prepared in Example 1-2 was evaluated through flask fermentation titer evaluation. First, each strain was inoculated into a test tube with a diameter of 18 mm containing 2 ml of seed medium, cultured with shaking at 30°C for 24 hours, and used as a seed culture. 0.7 ml of the seed culture was inoculated into a 250 ml corner-baffle flask containing 32 ml of the following production medium (24 ml of main medium + 8 ml of separate sterilization medium) and cultured at 170 rmp for 75 hours at 30°C. After completion of culture, the production capacity of XMP was measured by HPLC.
- the sdaA deletion strain showed a 2.32% increased XMP production ability compared to the control group, and the strain with sdaA deletion and an increased glyA copy number showed a 7.47% increased XMP production ability compared to the control group. It can be seen that sdaA deletion is effective in improving XMP production ability, and at the same time, enhancing glyA expression further improves XMP production ability. Through this, it was confirmed that deleting sdaA and strengthening glyA can be useful in producing XMP.
- Example 2 Production of gcvPTH enhanced strain based on sdaA deletion and glyA addition enhanced strain
- Example 2-1 Construction of gcvPTH copy additional recombinant vector and 5’-xanthylic acid producing strain
- a vector was created to add a copy of the gcvPTH gene of the Corynebacterium stasis strain in the form of a native promoter.
- the plasmid pDCM2 (Korea Publication No. 10-2020-0136813) for insertion and replacement of genes in the Corynebacterium chromosome was constructed as follows.
- the chromosomal gene of the Corynebacterium stasis wild type strain ATCC6872 was isolated according to the protocol provided in the kit using Intron's G-spin Total DNA extraction mini kit (Cat. No 17045), and the sequences of SEQ ID NO: 10 and SEQ ID NO: 11 were isolated according to the protocol provided in the kit.
- a gene fragment (Pn/gcvPTH) was generated through polymerase chain reaction using a primer pair, a primer pair of SEQ ID NO: 12 and SEQ ID NO: 13, a primer pair of SEQ ID NO: 14, a primer pair of SEQ ID NO: 15, and a primer pair of SEQ ID NO: 16 and SEQ ID NO: 17.
- the fragment of the gene obtained above was cut with restriction enzyme XbaI (New England Biolabs, Beverly, MA). Using T4 ligase (New England Biolabs, Beverly, MA), the above gene fragment was ligated into linear pDCM2 (Korean Publication No. 10-2020-0136813) cut with XbaI restriction enzyme.
- the prepared vector was named pDCM2-gcvPTH.
- sequences of primers used for vector construction are as follows.
- the pDCM2-gcvPTH vector constructed above was transformed into an sdaA-deficient and glyA-enhanced strain by electroporation, and then through PCR using the primer pair of SEQ ID NO: 18 and SEQ ID NO: 19 in a selection medium containing 25 mg/L of kanamycin. After initial confirmation, final confirmation was made through genetic sequence analysis.
- sequences of primers used to create strains are as follows.
- sequence number designation order 18 primer 5'-CCAGTACATTGTCATGGGAT-3' 19 primer 5'- GATTGGCATATCGCACCGAG -3'
- Flask titer evaluation was performed to measure the 5'-xanthyl acid production ability of the strain and parent strain prepared in Example 2.
- the strain was inoculated into a 14 ml tube containing 2.5 ml of the following seed medium and cultured with shaking at 170 rpm for 24 hours at 30°C.
- 2 ml of the seed culture was inoculated into a 250 ml corner-baffle flask containing 29 ml of the following production medium (24 ml of main medium + 5 ml of Byeolsal medium) and cultured with shaking at 170 rpm for 72 hours at 30°C.
- XMP production was measured using HPLC.
- composition of the seed medium and fermentation medium is the same as in Examples 1-3.
- Example 4 Construction of gcvPTH-enhanced, fdh-deleted, and purT-enhanced strains based on sdaA deletion and glyA addition enrichment strains.
- Example 4-1 Construction of fdh deletion and purT addition-enhanced recombinant vector and 5’-xanthyl acid producing strain
- Formic acid dehydrogenase from Corynebacterium stasis may be composed of formic acid dehydrogenase subunit 1 (Fdh subunit 1), formic acid dehydrogenase subunit 2 (Fdh subunit 2), and formic acid dehydrogenase subunit 3 (Fdh subunit 3). there is.
- Fdh subunit 1 formic acid dehydrogenase subunit 1
- Fdh subunit 2 formic acid dehydrogenase subunit 2
- Fdh subunit 3 formic acid dehydrogenase subunit 3
- formic acid dehydrogenase subunit 1 formic acid dehydrogenase subunit 1
- formic acid dehydrogenase subunit 2 formic acid dehydrogenase subunit 2
- formic acid dehydrogenase subunit 3 formic acid dehydrogenase subunit 3
- fdh genes formic acid dehydrogenase subunit 1
- fdh genes formic acid dehydrogenase fdh 1, fdh 2, and fdh 3 genes
- the chromosomal gene of the Corynebacterium stasis wild type ATCC6872 strain was isolated according to the protocol provided in the kit using Intron's G-spin Total DNA extraction mini kit (Cat. No 17045), and the sequences of SEQ ID NO: 20 and SEQ ID NO: 21 were isolated according to the protocol provided in the kit.
- a gene fragment (del_fdh:: Pcj7/purT-A, del_fdh::Pcj7/purT-B, del_fdh::Pcj7/purT-C, del_fdh::Pcj7/purT-D) were obtained, respectively.
- the conditions of the PCR method were denaturation at 94°C for 5 minutes, followed by 20 repetitions of denaturation at 94°C for 30 seconds, annealing at 55°C for 30 seconds, and polymerization at 72°C for 1 minute and 30 seconds, followed by polymerization at 72°C for 7 minutes.
- a 2nd PCR was performed using the four fragments obtained above as templates, and the resulting gene fragment was cut with restriction enzyme XbaI (New England Biolabs, Beverly, MA).
- restriction enzyme XbaI New England Biolabs, Beverly, MA
- T4 ligase New England Biolabs, Beverly, MA
- the resulting plasmid was named pDCM2-del_fdh-Pcj7/purT.
- sequences of the primers used for vector construction are as follows.
- the pDCM2-del_fdh-Pcj7/purT vector was transformed into the strain (CJX1664-del_sdaA-Pn-glyA-Pn/gcvPTH) prepared in Example 2 by electroporation, followed by selection containing 25 mg/L of kanamycin. Strains in which the mutant gene and vector were inserted together on the chromosome were selected as primary candidates in the culture medium. Afterwards, in the strain in which homologous recombination occurred, the primer pair of SEQ ID NO: 28 and SEQ ID NO: 29 was used to select a strain in which the fdh gene was deleted and the purT gene linked to the Pcj7 promoter was inserted at the corresponding position.
- sequences of primers used to create strains are as follows.
- Example 5 Evaluation of 5'-xanthyl acid production capacity of sdaA deletion and glyA enhanced strain, gcvPTH enrichment, purT enrichment, and fdh deletion integrated strain
- a flask titer evaluation was performed to measure the XMP production ability of the strains and parent strains produced in Examples 2 and 4 above.
- Each strain was inoculated into a 14 ml tube containing 2.5 ml of the following seed medium and cultured with shaking at 170 rpm for 24 hours at 30°C.
- 2 ml of the seed culture was inoculated into a 250 ml corner-baffle flask containing 29 ml of the following production medium (24 ml of main medium + 5 ml of Byeolsal medium) and cultured with shaking at 170 rpm for 72 hours at 30°C.
- XMP production was measured using HPLC.
- composition of the seed medium and fermentation medium is the same as Example 1-3.
- the strain was cultured using the fermentation titer evaluation method of Example 1-3. After completion of the culture, the production amount of XMP (5'-xanthylic acid) was measured using HPLC.
- Phytic acid 1.8g/L, magnesium sulfate 4.8g/L, nymeen 3ml/L, xylene 2%, adenine 100mg/L, sodium hydrogen phosphate (Na2HPO4) 7.7g/L , glutamine 2g/L, glucose 46g/L
- Example 7 Production of sdaA-deficient microorganism and confirmation of IMP production ability
- Example 7-1 Construction of sdaA gene deletion vector
- plasmid pDCM2 (Korea Publication No. 10-2020-0136813) was used to construct as follows.
- PCR was performed using the gDNA (genomic DNA) of wild-type Corynebacterium stasis ATCC6872 as a template, using primer pairs of sequences of SEQ ID NOs: 30 and 31 and primer pairs of sequences of SEQ ID NOs: 32 and 33, respectively. PCR was performed at 94°C for 5 minutes, then repeated 30 times at 94°C for 30 seconds, 55°C for 30 seconds, and 72°C for 1 minute, and then at 72°C for 5 minutes.
- the pDCM2 vector was treated with XbaI and the PCR product obtained above was fusion cloned. Fusion cloning used the In-Fusion® HD cloning kit (Clontech). The resulting plasmid was named pDCM2-del sdaA(I).
- sequences of the primers used for vector construction are as follows.
- sequence number designation order 30 primer 5'- AATTCGAGCTCGGTACCCCATTTCGTGACCATTAGCGT-3' 31 primer 5'- CTTTGTACTTGGTGAGATCATGCCAATAGCGCCAG-3' 32 primer 5'- GCTATTGGCATGATCTCACCAAGTACAAAGAGACT-3' 33 primer 5'- CGACTCTAGAGGATCCCCGGTTACCGCGCATTAGGACT-3'
- Example 7-2 Construction of sdaA gene deletion strain
- Example 7-1 After transforming the vector prepared in Example 7-1 into Corynebacterium stasis KCCM12151P by electroporation, the strain with the vector inserted into the chromosome was selected in a selection medium containing 25 mg/L of kanamycin. It was selected as a secondary candidate group. Afterwards, a strain lacking the sdaA gene was selected from the strain in which homologous recombination occurred using the primer pair of SEQ ID NO: 34 and SEQ ID NO: 35. The serine dehydratase-deficient strain obtained using the above method was named CJI-3176 (KCCM12151P_sda_deletion).
- sequence number designation order 34 primer 5’-TAATCCCCCCAGCTCACCGGC-3’ 35 primer 5’- TTTGGATGCCGAGGTCGTAG -3’
- Example 7-3 Evaluation of IMP production ability of sdaA gene deletion strain
- the IMP production ability of the strain and parent strain prepared in Example 7-2 was evaluated through flask fermentation titer evaluation.
- Corynebacterium stationanis KCCM12151P and CJI-3176 were inoculated into a 14 ml tube containing 2.5 ml of the following seed medium and cultured with shaking at 170 rpm for 24 hours at 30°C.
- 2 ml of the seed culture was inoculated into a 250 ml corner-baffle flask containing 29 ml of the following production medium (24 ml of main medium + 5 ml of Byeolsal medium) and cultured with shaking at 170 rp at 30°C for 72 hours.
- the production amount of 5'-inosic acid was measured using HPLC.
- composition of the seed medium and fermentation medium is as follows.
- Example 8 Construction of sdaA deletion and glyA additional enrichment strains and evaluation of IMP production ability
- Example 8-1 Construction of sdaA deletion and glyA addition enhanced recombinant vector and 5’-inosic acid producing strain
- the chromosomal genes of the Corynebacterium stasis wild type ATCC6872 strain were isolated according to the protocol provided in the kit using Intron's G-spin Total DNA extraction mini kit (Cat. No 17045), and the sequences of SEQ ID NO: 36 and SEQ ID NO: 37 were isolated according to the protocol provided in the kit.
- a gene fragment (del_sda:: Pcj7/glyA-A, del_sda::Pcj7/glyA -B, del_sda::Pcj7/glyA -C, del_sda::Pcj7/glyA -D) were obtained, respectively.
- the conditions for the PCR method were denaturation at 94°C for 5 minutes, followed by denaturation at 94°C for 30 seconds, annealing at 55°C for 30 seconds, and polymerization at 72°C for 1 minute, repeated 20 times, followed by polymerization at 72°C for 7 minutes.
- a 2nd PCR was performed using the four fragments obtained above as templates, and the resulting gene fragment was cut with restriction enzyme XbaI (New England Biolabs, Beverly, MA).
- restriction enzyme XbaI New England Biolabs, Beverly, MA
- T4 ligase New England Biolabs, Beverly, MA
- the resulting plasmid was named pDCM2-del_sdaA-Pn/glyA.
- sequences of the primers used for vector construction are as follows.
- the mutant gene on the chromosome was grown in a selection medium containing 25 mg/L of kanamycin. Strains in which the vector was also inserted were selected as primary candidates. Afterwards, in the strain in which homologous recombination occurred, the primer pair of SEQ ID NO: 44 and SEQ ID NO: 45 was used to select a strain in which the sdaA gene was deleted and the glyA gene linked to the Pcj7 promoter was inserted at the corresponding position. The strain obtained in the same manner as above was named CJI-3177 (CJI-3176_del_sdaA-Pn/glyA).
- sequences of primers used to create strains are as follows.
- sequence number designation order 44 primer 5’-TAATCCCCGAGCTCACCGGC-3’ 45 primer 5’-TTTGGATGCCGAGGTCGTAG-3’
- Example 8-2 Evaluation of IMP production ability of strains constructed with sdaA deletion and glyA addition enrichment
- Example 7-2 and Example 8-1 The IMP production ability of the strains and parent strains prepared in Example 7-2 and Example 8-1 was evaluated through flask fermentation titer evaluation.
- Corynebacterium stationanis KCCM12151P, CJI-3176, and CJI-3177 were inoculated into a 14 ml tube containing 2.5 ml of the following seed medium and cultured with shaking at 170 rpm for 24 hours at 30°C.
- 2 ml of the seed culture was inoculated into a 250 ml corner-baffle flask containing 29 ml of the following production medium (24 ml of main medium + 5 ml of Byeolsal medium) and cultured with shaking at 170 rp at 30°C for 72 hours.
- the production amount of 5'-inosic acid was measured using HPLC.
- composition of the seed medium and fermentation medium is as follows.
- Example 9 Construction and evaluation of gcvPTH-enhanced, fdh-deleted, and purT-enhanced strains based on sdaA deletion and glyA additional enrichment strains (IMP)
- Example 9-1 Construction of gcvPTH additionally enhanced recombinant vector and 5’-inosic acid strain
- a vector was created to add a copy of the endogenous gcvPTH gene of the Corynebacterium stasis strain in the form of a native promoter.
- the plasmid pDCM2 (Korea Publication No. 10-2020-0136813) for insertion and replacement of genes in the Corynebacterium chromosome was constructed as follows.
- the chromosomal gene of the Corynebacterium stasis wild type ATCC6872 strain was isolated using Intron's G-spin Total DNA extraction mini kit (Cat. No 17045) according to the protocol provided in the kit, and sequenced as SEQ ID NO: 46 and SEQ ID NO: 47.
- Gene fragment Pn/ gcvPTH-A, Pn/gcvPTH -B, Pn/gcvPTH -C, Pn/gcvPTH-D) were obtained, respectively.
- the conditions for the PCR method were denaturation at 94°C for 5 minutes, followed by denaturation at 94°C for 30 seconds, annealing at 55°C for 30 seconds, and polymerization at 72°C for 1 minute, repeated 20 times, followed by polymerization at 72°C for 7 minutes.
- the fragment of the gene obtained above was cut with restriction enzyme XbaI (New England Biolabs, Beverly, MA). Using T4 ligase (New England Biolabs, Beverly, MA), the above gene fragment was ligated into linear pDCM2 (Korean Publication No. 10-2020-0136813) cut with XbaI restriction enzyme.
- the prepared vector was named pDCM2-Pn/gcvPTH.
- sequences of the primers used for vector construction are as follows.
- Example 9-2 Construction of a 5’-inosine acid producing strain with enhanced gcvPTH gene
- strain in which homologous recombination occurred was first confirmed through PCR using the primer pair of SEQ ID NO: 54 and SEQ ID NO: 55, and was finally confirmed through gene sequence analysis.
- the selected strains were each named CJI-3192 (CJI-3177_Pn/gcvPTH).
- Example 9-3 Construction of fdh deletion and purT addition enhanced recombinant vector and 5’-inosic acid producing strain
- the chromosomal genes of the Corynebacterium stasis wild type ATCC6872 strain were isolated according to the protocol provided in the kit using Intron's G-spin Total DNA extraction mini kit (Cat. No 17045), and the genes of SEQ ID NO: 56 and SEQ ID NO: 57 were isolated according to the protocol provided in the kit.
- a gene fragment (del_fdh:: Pcj7/purT-A, del_fdh::Pcj7/purT-B, del_fdh::Pcj7/purT-C, del_fdh::Pcj7/purT-D) were obtained, respectively.
- the conditions of the PCR method were denaturation at 94°C for 5 minutes, followed by 20 repetitions of denaturation at 94°C for 30 seconds, annealing at 55°C for 30 seconds, and polymerization at 72°C for 1 minute and 30 seconds, followed by polymerization at 72°C for 7 minutes.
- a 2nd PCR was performed using the four fragments obtained above as templates, and the resulting gene fragment was cut with restriction enzyme XbaI (New England Biolabs, Beverly, MA).
- restriction enzyme XbaI New England Biolabs, Beverly, MA
- T4 ligase New England Biolabs, Beverly, MA
- the resulting plasmid was named pDCM2-del_fdh-Pcj7/purT.
- sequences of the primers used for vector construction are as follows.
- the chromosome was grown in a selection medium containing 25 mg/L of kanamycin. Strains in which the mutant gene and vector were inserted together were selected as primary candidates. Afterwards, from the strain in which homologous recombination occurred, a strain in which the fdh gene was deleted and the purT gene linked to the Pcj7 promoter was inserted at the corresponding position was selected using the primer pair of SEQ ID NO: 64 and SEQ ID NO: 65. The strain obtained by the above method was named CJI-3193 (CJI-3192-del_fdh-Pcj7/purT).
- sequences of primers used to create strains are as follows.
- Example 10 Confirmation of 5’-inosic acid production ability of gcvPTH-enhanced, fdh-deleted, and purT-enhanced strains based on glyA-enhanced and sda-deleted strains
- a flask titer evaluation was performed to measure the 5'-inosic acid production ability of the strains and parent strains prepared in Examples 9-2 and 9-3.
- Corynebacterium stationanis KCCM12151P, CJI-3192, and CJI-3193 were inoculated into a 14 ml tube containing 2.5 ml of the following seed medium and cultured with shaking at 170 rpm for 24 hours at 30°C.
- 2 ml of the seed culture was inoculated into a 250 ml corner-baffle flask containing 29 ml of the following production medium (24 ml of main medium + 5 ml of Byeolsal medium) and cultured with shaking at 170 rpm for 72 hours at 30°C.
- the production amount of 5'-inosic acid was measured using HPLC.
- composition of the seed medium and fermentation medium was the same as Example 8-2.
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Abstract
Description
| 서열번호 | 명칭 | 서열 |
| 1 | primer | 5'- acccggggatcctctagaGTGCCGTTACCTCCCGC-3' |
| 2 | primer | 5'- TGGAGTGCGTAGCGTGCGAAATGACTCCTTTCTAAA-3' |
| 3 | primer | 5'- TTTAGAAAGGAGTCATTTCGCACGCTACGCACTCCA-3' |
| 4 | primer | 5'- AAGCTTGCATGCCTGCAGCGTCACCGCGCGGAGATA-3' |
| 5 | primer | 5'- GAAATGACTCCTTTCTAAAAAGGGG -3' |
| 6 | primer | 5'- TTAGAAAGGAGTCATTTCGAACTTGCAGCAAACGTGCTG -3' |
| 7 | primer | 5'- CCTTGGTGAGGCACTTTGTG -3' |
| 8 | primer | 5'- CAAAGTGCCTCACCAAGGGCACGCTACGCACTCCATATA -3' |
| 서열번호 | 명칭 | 서열 |
| 9 | primer | 5'- GTCAACGCGCACTTGGATCT-3' |
| 균주번호 | 도입형태 | XMP(g/L) | 농도증가율 (%) |
| CJX1664 | Control | 4.32 | - |
| CJX1664-del_sdaA | 4.42 | 2.32 | |
| CJX1664-del_sdaA-Pn-glyA | 4.64 | 7.47 |
| 서열번호 | 명칭 | 서열 |
| 10 | primer | 5'- AATTCGAGCTCGGTACCCAGGCACAGCCGACATTACGG -3' |
| 11 | primer | 5'- GTAGCACATCTGACGAATGTCCAAGTCTAAGGAAA -3' |
| 12 | primer | 5'- TTAGACTTGGACATTCGTCAGATGTGCTACTTGCC -3' |
| 13 | primer | 5'- TGCGCCATTAGCGTGTTACTTCTCGCGGCTATAGA -3' |
| 14 | primer | 5'- AGCCGCGAGAAGTAACACGCTAATGGCGCATTGAA -3' |
| 15 | primer | 5'- TGAATTATCCGCGTCTTAGATGCCGTTTTCTGCCG-3' |
| 16 | primer | 5'- GAAAACGGCATCTAAGACGCGGATAATTCAGCTGT -3' |
| 17 | primer | 5'- CGACTCTAGAGGATCCCCGATGAAGCGAACACTTAAAT -3' |
| 서열번호 | 명칭 | 서열 |
| 18 | primer | 5'- CCAGTACATTGTCATGGGAT -3' |
| 19 | primer | 5'- GATTGGCATATCGCACCGAG -3' |
| 균주번호 | 도입형태 | XMP(g/L) | 농도증가율 (%) |
| CJX1664 | Control | 4.51 | - |
| CJX1664-del_sdaA-Pn-glyA | 4.85 | 7.45 | |
| CJX1664-del_sdaA-Pn-glyA- Pn/gcvPTH | 5.48 | 21.5 |
| 서열번호 | 명칭 | 서열 |
| 20 | primer | 5'- TCGAGCTCGGTACCCGTTGCCGTATCAGACATGCTCAG -3' |
| 21 | primer | 5’- GATTAGCCTGAAGGAATTGATTTATCTCGACCAAACAG -3’ |
| 22 | primer | 5’- GGTCGAGATAAATCAATTCCTTCAGGCTAATCTTTTCC -3’ |
| 23 | primer | 5’- CGATATAAGACTCCATCATATGTGTTTCCTTTCGTTGG-3’ |
| 24 | primer | 5’- AAAGGAAACACATATGATGGAGTCTTATATCGGTAGCC -3’ |
| 25 | primer | 5'- CTCATAGGTGCCGAACTTACTCGGAGATTTCGACCTCA-3' |
| 26 | primer | 5'- CGAAATCTCCGAGTAAGTTCGGCACCTATGAGAATATG -3' |
| 27 | primer | 5'- CTCTAGAGGATCCCCGGCAAGTGTTTCTTGGCGCCATTC-3' |
| 서열번호 | 명칭 | 서열 |
| 28 | primer | 5’-TAATCCCCCAGCTCACCGGC-3’ |
| 29 | primer | 5’- TTTGGATGCCGAGGTCGTAG-3’ |
| 균주번호 | 도입형태 | XMP(g/L) | 농도증가율 (%) |
| CJX1664 | Control | 4.48 | - |
| CJX1664-del_sdaA-Pn-glyA | 4.81 | 7.39 | |
| CJX1664-del_sdaA-Pn-glyA- Pn/gcvPTH | 5.47 | 22.2 | |
| CJX1664-del_sdaA-Pn-glyA- Pn/gcvPTH-del_fdh-Pcj7/purT | 5.59 | 24.8 |
| 균주번호 | 도입형태 | XMP(g/L) | GMP(g/L) | 전환율(%) (GMP생성량/XMP소모량) |
| CJX1664 | Control | 4.43 | 3.23 | 72.9 |
| CJX1664-del_sdaA | 4.53 | 3.31 | 73.0 | |
| CJX1664-del_sdaA-Pn-glyA | 4.76 | 3.48 | 73.1 | |
| CJX1664-del_sdaA-Pn-glyA- Pn/gcvPTH | 5.42 | 3.96 | 73.0 | |
| CJX1664-del_sdaA-Pn-glyA- Pn/gcvPTH-del_fdh-Pcj7/purT | 5.54 | 4.06 | 73.2 |
| 서열번호 | 명칭 | 서열 |
| 30 | primer | 5'- AATTCGAGCTCGGTACCCCATTTCGTGACCATTAGCGT-3' |
| 31 | primer | 5'- CTTTGTACTTGGTGAGATCATGCCAATAGCGCCAG-3' |
| 32 | primer | 5'- GCTATTGGCATGATCTCACCAAGTACAAAGAGACT-3' |
| 33 | primer | 5'- CGACTCTAGAGGATCCCCGGTTACCGCGCATTAGGACT-3' |
| 서열번호 | 명칭 | 서열 |
| 34 | primer | 5’- TAATCCCCCAGCTCACCGGC -3’ |
| 35 | primer | 5’- TTTGGATGCCGAGGTCGTAG -3’ |
| 균주번호 | 도입형태 | OD | 5’-이노신산(g/L) | 농도증가율 (%) |
| KCCM12151P | Control | 41.3 | 5.2 | - |
| CJI-3176 | △sda | 40.8 | 5.5 | 5.7 |
| 서열번호 | 명칭 | 서열 |
| 36 | primer | 5’- AATTCGAGCTCGGTACCCCATTTCGTGACCATTAGCGT -3’ |
| 37 | primer | 5’- ATTAGCCTGAAGGAAGATCATGCCAATAGCGCCAG -3’ |
| 38 | primer | 5’- GCTATTGGCATGATCTTCCTTCAGGCTAATCTTTT -3’ |
| 39 | primer | 5’-ATTCTGGGTAGTCATCATATGTGTTTCCTTTCGTT-3’ |
| 40 | primer | 5’- AAGGAAACACATATGATGACTACCCAGAATTCTTC -3’ |
| 41 | primer | 5’- CTTTGTACTTGGTGACCAAGAGTCAGGATGCCGAA-3’ |
| 42 | primer | 5’- CATCCTGACTCTTGGTCACCAAGTACAAAGAGACT -3’ |
| 43 | primer | 5’- CGACTCTAGAGGATCCCCGGTTACCGCGCATTAGGACT-3’ |
| 서열번호 | 명칭 | 서열 |
| 44 | primer | 5’-TAATCCCCCAGCTCACCGGC-3’ |
| 45 | primer | 5’- TTTGGATGCCGAGGTCGTAG-3’ |
| 균주번호 | 도입형태 | OD | 5’-이노신산(g/L) | 농도증가율 (%) |
| KCCM12151P | Control | 41.3 | 5.2 | - |
| CJI-3176 | △sda | 40.8 | 5.5 | 5.7 |
| CJI-3177 | CJI-3176 -del_sdaA- Pcj7/glyA | 39.2 | 5.9 | 13.4 |
| 서열번호 | 명칭 | 서열 |
| 46 | Pn/gcvPTH-A-F | 5’- AATTCGAGCTCGGTACCCAGGCACAGCCGACATTACGG -3’ |
| 47 | Pn/gcvPTH-A-R | 5’- GTAGCACATCTGACGAATGTCCAAGTCTAAGGAAA -3’ |
| 48 | Pn/gcvPTH-B-F | 5’- TTAGACTTGGACATTCGTCAGATGTGCTACTTGCC -3’ |
| 49 | Pn/gcvPTH-B-R | 5’- TGCGCCATTAGCGTGTTACTTCTCGCGGCTATAGA -3’ |
| 50 | Pn/gcvPTH-C-F | 5’- AGCCGCGAGAAGTAACACGCTAATGGCGCATTGAA -3’ |
| 51 | Pn/gcvPTH-C-R | 5’- TGAATTATCCGCGTCTTAGATGCCGTTTTCTGCCG-3’ |
| 52 | Pn/gcvPTH-D-F | 5’- GAAAACGGCATCTAAGACGCGGATAATTCAGCTGT -3’ |
| 53 | Pn/gcvPTH-D-R | 5’- CGACTCTAGAGGATCCCCGATGAAGCGAACACTTAAAT -3’ |
| 서열번호 | 명칭 | 서열 |
| 54 | primer | 5’- CCAGTACATTGTCATGGGAT-3’ |
| 55 | primer | 5’- GATTGGCATATCGCACCGAG -3’ |
| 서열번호 | 명칭 | 서열 |
| 56 | primer | 5’- TCGAGCTCGGTACCCGTTGCCGTATCAGACATGCTCAG -3’ |
| 57 | primer | 5’- GATTAGCCTGAAGGAATTGATTTATCTCGACCAAACAG -3’ |
| 58 | primer | 5’- GGTCGAGATAAATCAATTCCTTCAGGCTAATCTTTTCC -3’ |
| 59 | primer | 5’- CGATATAAGACTCCATCATATGTGTTTCCTTTCGTTGG-3’ |
| 60 | primer | 5’- AAAGGAAACACATATGATGGAGTCTTATATCGGTAGCC -3’ |
| 61 | primer | 5’- CTCATAGGTGCCGAACTTACTCGGAGATTTCGACCTCA-3’ |
| 62 | primer | 5’- CGAAATCTCCGAGTAAGTTCGGCACCTATGAGAATATG -3’ |
| 63 | primer | 5’- CTCTAGAGGATCCCCGGCAAGTGTTTCTTGGCGCCATTC-3’ |
| 서열번호 | 명칭 | 서열 |
| 64 | primer | 5’-GCGAGGGGGAAGAAAAGTA -3’ |
| 65 | primer | 5’- CGTTGCCCTTTTTCTTCT -3’ |
| 균주번호 | 도입형태 | OD | 5’-이노신산(g/L) | 농도증가율 (%) |
| KCCM12151P | Control | 40.1 | 5.3 | - |
| CJI-3192 | CJI-3177_Pn/gcvPTH | 39.1 | 6.2 | 16.9 |
| CJI-3193 | CJI-3192_del_fdh-Pcj7/PurT | 39.4 | 6.9 | 30.1 |
Claims (10)
- 세린 탈수화효소 단백질 활성이 내재적 활성에 비하여 약화된, 퓨린 뉴클레오티드 생산능을 가지는 미생물.
- 제1항에 있어서, 상기 세린 탈수화효소는 서열번호 66의 아미노산 서열로 이루어지는 것인, 퓨린 뉴클레오티드 생산능을 가지는 미생물.
- 제1항에 있어서, 상기 미생물은 추가로 하기 (a) 내지 (d)로 이루어진 군으로부터 선택되는 어느 하나 이상의 단백질 활성이 조절된 것인, 퓨린 뉴클레오티드 생산능을 가지는 미생물:(a) 포름산 탈수소효소 단백질 활성이 내재적 활성에 비하여 약화;(b) 글리신 분해 효소 단백질 활성이 내재적 활성에 비하여 강화;(c) 세린 하이드록시메틸트렌스퍼라제 단백질 활성이 내재적 활성에 비하여 강화; 및(d) 포르메이트 의존성 포스포리보실글리신아미드 포밀 전이효소 단백질 활성이 내재적 활성에 비하여 강화.
- 제1항에 있어서, 상기 미생물은 코리네박테리움 속 미생물인 것인, 퓨린 뉴클레오티드 생산능을 가지는 미생물.
- 제4항에 있어서, 상기 코리네박테리움 속 미생물은 코리네박테리움 스테이셔니스인 것인, 퓨린 뉴클레오티드 생산능을 가지는 미생물.
- 제1항 내지 제5항 중 어느 한 항에 있어서, 상기 미생물은 비변형 미생물과 비교하여 퓨린 뉴클레오티드 생산능이 증가된 것인, 퓨린 뉴클레오티드 생산능을 가지는 미생물.
- 세린 탈수화효소 단백질 활성이 내재적 활성에 비하여 약화된 미생물을 배지에서 배양하는 단계를 포함하는, 퓨린 뉴클레오티드의 생산 방법.
- 제7항에 있어서, 상기 배양된 미생물, 상기 미생물의 배양물, 상기 미생물의 발효물 또는 상기 배양 배지에서 목적 물질을 회수하는 단계를 추가적으로 포함하는 것인, 방법.
- 세린 탈수화효소 단백질 활성이 내재적 활성에 비하여 약화된 미생물, 상기 미생물의 배양물, 상기 미생물의 발효물 또는 이들 중 2 이상의 조합을 포함하는 퓨린 뉴클레오티드 생산용 조성물.
- 세린 탈수화효소 단백질 활성이 내재적 활성에 비하여 약화된 미생물의 퓨린 뉴클레오티드 생산 용도.
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| CN202380020295.6A CN118742646A (zh) | 2022-12-08 | 2023-12-07 | 生产嘌呤核苷酸的微生物及利用其生产嘌呤核苷酸的方法 |
| EP23901126.5A EP4624581A1 (en) | 2022-12-08 | 2023-12-07 | Microorganism producing purine nucleotides and method for producing purine nucleotides using same |
| JP2025533245A JP2025540281A (ja) | 2022-12-08 | 2023-12-07 | プリン・ヌクレオチドを生産する微生物及びそれを用いたプリン・ヌクレオチドの生産方法 |
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| CN (1) | CN118742646A (ko) |
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| CN118742646A (zh) | 2024-10-01 |
| TW202438668A (zh) | 2024-10-01 |
| AR131293A1 (es) | 2025-03-05 |
| EP4624581A1 (en) | 2025-10-01 |
| KR20240086804A (ko) | 2024-06-19 |
| JP2025540281A (ja) | 2025-12-11 |
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