WO2020218736A1 - L-히스티딘 생산능이 강화된 미생물 및 이를 이용한 히스티딘 생산방법 - Google Patents
L-히스티딘 생산능이 강화된 미생물 및 이를 이용한 히스티딘 생산방법 Download PDFInfo
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Definitions
- the present application relates to a microorganism having enhanced L-histidine production capacity and a histidine production method using the same.
- L-histidine is one of the 20 standard amino acids. From a nutritional point of view, it is not required in large amounts in adults, but is classified as an essential amino acid corresponding to growing children. In addition, L-histidine is involved in important physiological processes such as antioxidant and immune regulation, and is used in the medical industry, such as gastrointestinal ulcer treatment, a raw material for circulatory system treatment, and amino acid solution formulation.
- Histidine is particularly high in hemoglobin, so it is mainly produced through proteolytic extraction using blood meal as a raw material. However, this has disadvantages such as low efficiency and environmental pollution.
- L-histidine it is possible to produce L-histidine through microbial fermentation, but large-scale industrialization has not yet been achieved. This is because the biosynthesis of L-histidine has a competitive relationship with PRPP, a precursor for nucleotide synthesis, and has a complex biosynthetic process and regulatory mechanism that requires high energy.
- the L-histidine-producing ability of microorganisms used in the fermentation method has conventionally been improved by inducing mutagenesis, selecting mutants, and controlling the metabolism of strains through genetic improvement.
- the production of histidine using microorganisms is known to be biosynthesized through several steps from PRPP, but the first enzyme ATP phosphoribosyl transferase, among the enzymes involved in histidine biosynthesis, inhibits feedback by the final product, L-histidine or a derivative thereof. Occurs, there is a problem in industrially mass-producing L-histidine (International Publication No. WO2014-029376). Due to these complex biosynthetic processes and regulatory mechanisms, in order to produce L-histidine through microbial culture, approaches from various perspectives related to microbial metabolism were required.
- the present inventors introduced a glycine transporter cycA derived from Corynebacterium ammoniagenes in order to develop a usable microorganism by introducing glycine discharged from the cell, and as a result, a microorganism producing L-histidine in a high yield was completed.
- the present application provides a microorganism of the genus Corynebacterium producing L-histidine with enhanced glycine transporter activity.
- the present application provides a composition for producing L-histidine comprising the microorganism of the present application.
- the present application provides a method for preparing L-histidine comprising culturing the microorganism of the present application.
- the present application provides a use of a microorganism of the genus Corynebacterium in which the activity of a glycine transporter is enhanced to produce L-histidine.
- the microorganism for producing L-histidine of the present application has excellent histidine production ability, it can be utilized for efficient mass production of L-histidine.
- One aspect of the present application provides a microorganism of the genus Corynebacterium for producing L-histidine, having enhanced glycine transporter activity.
- glycine transporter of the present application is included without limitation as long as it is a protein having a function of introducing glycine into cells, and specifically, D-serine/D-alanine/glycine transporter (D-serine/D -alanine/glycine transporter).
- the glycine transporter may be used in combination with a D-serine/D-alanine/glycine transporter or a glycine influx protein.
- the "D-serine/D-alanine/glycine transporter” is a protein that can participate in both serine, alanine and glycine transport, and is a known database, NCBI Genbank. The information can be obtained by searching the D-Serine/D-Alanine/glycine transporter sequence in the back.
- the transporter may be specifically CycA or AapA, and more specifically, may be a CycA protein, but is not limited thereto.
- CycA protein in the present application refers to a protein involved in uptake of serine, alanine and glycine. CycA protein is encoded by the cycA gene, and the cycA gene is Escherichia coli , Klebsialla pneumoniae , Mycobacterium bovis , and Salmonella enterica . , Erwinia amylovora ( Erwinia amylovora ) and Corynebacterium ammonia genes ( Corynebacterium ammoniagenes ) is known to exist in microorganisms.
- the CycA protein of the present application may include any one capable of enhancing histidine-producing ability.
- the CycA protein may be derived from a microorganism of the genus Corynebacterium or genus Escherichia, and more specifically, may be derived from Corynebacterium ammonia genera, but is not limited thereto.
- the Corynebacterium ammoniagenes is the same species as Brevibacterium ammoniagenes , Corynebacterium stationis , Brevibacterium stationis ) And were classified in the same taxon (International Journal of Systematic and Evolutionary Microbiology 60: 874-879).
- the Brevibacterium ammonia genera has been renamed to Corynebacterium staionis.
- Corynebacterium ammoniagenes Corynebacterium ammoniagenes
- Brevibacterium ammoniagenes Corynebacterium stasis
- Brevibacterium stasis and Brevibacterium stasis
- the CycA protein of the present application may include SEQ ID NO: 1 or an amino acid sequence having 70% or more homology or identity thereto.
- the CycA protein comprises the amino acid sequence of SEQ ID NO: 1, or at least 70%, 75%, 80%, 85%, 86%, 87%, 88%, 89% with the amino acid sequence of SEQ ID NO: 1, Amino acid sequences having 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99% homology or identity may be included.
- an amino acid sequence having the homology or identity and exhibiting efficacy corresponding to the protein is included within the scope of the present application, even if some sequences have an amino acid sequence that has been deleted, modified, substituted or added.
- a probe that can be prepared from a known gene sequence for example, a polypeptide encoded by a polynucleotide hybridized under stringent conditions with a complementary sequence to all or part of the nucleotide sequence encoding the polypeptide, serine, Polypeptides having alanine and glycine influx activity may also be included without limitation.
- the "conservative substitution” refers to the substitution of one amino acid for another amino acid having similar structural and/or chemical properties. Such amino acid substitutions can generally occur based on similarity 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
- Aromatic amino acids include phenylalanine, tryptophan and tyrosine
- hydrophobic amino acids include alanine, valine, isoleucine, leucine, methionine, phenylalanine, tyrosine and tryptophan.
- polynucleotide has the meaning of comprehensively including DNA or RNA molecules, and nucleotides, which are basic structural units in polynucleotides, may include not only natural nucleotides but also analogs with modified sugar or base moieties ( Scheit, Nucleotide Analogs, John Wiley, New York (1980); Uhlman and Peyman, Chemical Reviews, 90:543-584 (1990)).
- the polynucleotide is at least 70%, 75%, 80%, 85%, 86%, 87%, 88%, 89%, 90%, 91 with the polynucleotide encoding the CycA protein of the present application or the CycA protein of the present application It may be a polynucleotide encoding a polypeptide having %, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99% homology or identity.
- a polynucleotide encoding a protein comprising an amino acid sequence having 70% or more homology or identity to SEQ ID NO: 1 or SEQ ID NO: 1 and at least 70% of the polynucleotide sequence of SEQ ID NO: 2 or SEQ ID NO: 2 , 75%, 80%, 85%, 86%, 87%, 88%, 89%, 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99 It may be a polynucleotide having% homology or identity.
- a protein comprising an amino acid sequence having 70% or more identity to SEQ ID NO: 1 or SEQ ID NO: 1 by codon degeneracy, or a polynucleotide that can be translated into a protein having homology or identity thereto may also be included. It is self-evident.
- a probe that can be prepared from a known gene sequence for example, a complementary sequence for all or a part of the polynucleotide sequence and hydride under stringent conditions, having 70% or more identity with the amino acid sequence of SEQ ID NO: 1
- Any polynucleotide sequence encoding a protein comprising an amino acid sequence may be included without limitation.
- the "stringent conditions" refer to conditions that allow specific hybridization between polynucleotides.
- genes with high homology or identity 70% or more, 80% or more, specifically 85% or more, specifically 90% or more, more specifically 95% or more, more specifically 97% or more
- a condition in which genes having more than 99% homology or identity are hybridized, and genes with lower homology or identity are not hybridized or a washing condition of ordinary Southern hybridization, which is 60°C, 1 ⁇ SSC, 0.1% SDS, specifically 60° C., 0.1 ⁇ SSC, 0.1% SDS, more specifically 68° C., 0.1 ⁇ SSC, at a salt concentration and temperature corresponding to 0.1% SDS, once, specifically 2 to 3 times Conditions for washing can be listed.
- Hybridization requires that two polynucleotides have a complementary sequence, although a mismatch between bases is possible depending on the stringency of the hybridization.
- the term "complementary" is used to describe the relationship between nucleotide bases capable of hybridizing to each other. For example, with respect to DNA, adenosine is complementary to thymine and cytosine is complementary to guanine.
- the present application may also include substantially similar polynucleotide sequences as well as isolated polynucleotide fragments that are complementary to the entire sequence.
- polynucleotides having homology or identity can be detected using hybridization conditions including a hybridization step at a Tm value of 55° C. and using the above-described conditions.
- the Tm value may be 60°C, 63°C, or 65°C, but is not limited thereto and may be appropriately adjusted by a person skilled in the art according to the purpose.
- homology refers to the degree to which two given amino acid sequences or base sequences are related and may be expressed as a percentage.
- the terms homology and identity can often be used interchangeably.
- the sequence homology or identity of a conserved polynucleotide or polypeptide is determined by standard alignment algorithms, and the default gap penalty established by the program used can be used together.
- Substantially, homologous or identical sequences are generally at least about 50%, 60%, 70%, 80% of the sequence full or full-length in medium or high stringent conditions. Or it can hybridize to 90% or more. Hybridization is also contemplated for polynucleotides containing degenerate codons instead of codons in the polynucleotide.
- Homology or identity to the polypeptide or polynucleotide sequence can be determined, for example, by the algorithm BLAST by literature [see Karlin and Altschul, Pro. Natl. Acad. Sci. USA, 90, 5873 (1993)] or FASTA by Pearson (Methods Enzymol., 183, 63, 1990). Based on this algorithm BLAST, a program called BLASTN or BLASTX has been developed (see: http://www.ncbi.nlm.nih.gov).
- the term "enhancing the activity of a protein” in the present application means that the activity is improved compared to the intrinsic activity of a protein possessed by a microorganism or activity before modification.
- the activity enhancement may include both introduction of a foreign protein and enhancement of the activity of an intrinsic protein. That is, introducing a foreign protein into a microorganism having an intrinsic activity of a specific protein, and introducing the protein into a microorganism having no intrinsic activity are also included.
- the "protein introduction” means that the activity of a specific protein is introduced into a microorganism and modified to be expressed. This can also be expressed by enhancing the activity of the protein.
- the term "intrinsic" refers to a condition originally possessed by the parent strain before the change in the trait when the trait of a microorganism is changed due to genetic variation caused by natural or artificial factors.
- It may be performed by a method of transforming to be strengthened by a combination thereof, but is not limited thereto.
- the 1) increase in the copy number of the polynucleotide may be performed in a form operably linked to a vector, but is not particularly limited thereto, or may be performed by being inserted into a chromosome in a host cell.
- the polynucleotide encoding the protein of the present invention is operably linked to a vector capable of replicating and functioning independently of the host and introduced into a host cell, or the polynucleotide is inserted into a chromosome in the host cell.
- the polynucleotide is operably linked to a vector capable of being introduced into a host cell, thereby increasing the number of copies of the polynucleotide in the chromosome of the host cell.
- 2) modification of the expression control sequence to increase the expression of the polynucleotide is not particularly limited thereto, but deletion, insertion, non-conservative or conservative substitution of the nucleic acid sequence to further enhance the activity of the expression control sequence, or It may be performed by inducing a mutation in the sequence by a combination of, or by replacing with a nucleic acid sequence having a stronger activity.
- the expression control sequence although not particularly limited thereto, may include a promoter, an operator sequence, a sequence encoding a ribosome binding site, a sequence controlling termination of transcription and translation, and the like.
- a strong heterologous promoter may be connected to the upper part of the polynucleotide expression unit.
- the strong promoter include CJ7 promoter (Korean Patent No. 0620092 and WO2006/065095), lysCP1 promoter (WO2009/096689), EF -Tu promoter, groEL promoter, aceA or aceB promoter, and the like, but are not limited thereto.
- modification of the polynucleotide sequence on the chromosome is not particularly limited thereto, but the expression control sequence by deletion, insertion, non-conservative or conservative substitution of the nucleic acid sequence to further enhance the activity of the polynucleotide sequence, or a combination thereof It can be carried out by inducing a phase mutation, or by replacing with an improved polynucleotide sequence to have a stronger activity.
- introduction of a foreign polynucleotide sequence may be performed by introducing a foreign polynucleotide encoding a protein exhibiting the same/similar activity as the protein, or a codon-optimized variant polynucleotide thereof into a host cell.
- the foreign polynucleotide may be used without limitation in its origin or sequence as long as it exhibits the same/similar activity as the protein.
- the introduced foreign polynucleotide can be introduced into the host cell by optimizing its codon so that optimized transcription and translation are performed in the host cell.
- the introduction may be performed by appropriately selecting a known transformation method by a person skilled in the art, and the introduced polynucleotide may be expressed in a host cell to produce a protein, thereby increasing its activity.
- the method of modifying to be enhanced by the combination of 1) to 4) above includes an increase in the copy number of the polynucleotide encoding the protein, modification of the expression control sequence to increase its expression, and the polynucleotide on the chromosome Modification of the sequence and the modification of foreign polynucleotides or codon-optimized variant polynucleotides exhibiting the activity of the protein may be applied together.
- vector refers to a DNA preparation containing a polynucleotide sequence encoding the protein of interest operably linked to a suitable regulatory sequence so that the protein of interest can be expressed in a suitable host.
- the regulatory sequence may include a promoter capable of initiating transcription, any operator sequence for regulating such transcription, a sequence encoding a suitable mRNA ribosome binding site, and a sequence controlling termination of transcription and translation.
- Vectors can be transformed into a suitable host cell and then replicated or function independently of the host genome, and can be integrated into the genome itself.
- a polynucleotide encoding a target protein in a chromosome may be replaced with a mutated polynucleotide through a vector for intracellular chromosome insertion. Insertion of the polynucleotide into the chromosome may be performed by any method known in the art, for example, homologous recombination, but is not limited thereto.
- the vector of the present application is not particularly limited, and any vector known in the art may be used.
- Examples of commonly used vectors include natural or recombinant plasmids, cosmids, viruses and bacteriophages.
- pWE15, M13, MBL3, MBL4, IXII, ASHII, APII, t10, t11, Charon4A, Charon21A, etc. can be used as a phage vector or a cosmid vector, and as a plasmid vector, pBR system, pUC system, pBluescriptII system , pGEM system, pTZ system, pCL system, pET system, etc. can be used.
- pDZ, pACYC177, pACYC184, pCL, pECCG117, pUC19, pBR322, pMW118, pCC1BAC vectors, and the like can be used.
- transformation in the present application means introducing a vector containing a polynucleotide encoding a target protein into a host cell so that the protein encoded by the polynucleotide can be expressed in the host cell.
- Transformed polynucleotides may include all of them, whether inserted into the chromosome of the host cell or located outside the chromosome, as long as it can be expressed in the host cell.
- the polynucleotide includes DNA and RNA encoding the target protein.
- the polynucleotide may be introduced in any form as long as it can be introduced into a host cell and expressed.
- the polynucleotide may be introduced into a host cell in the form of an expression cassette, which is a gene construct containing all elements necessary for self-expression.
- the expression cassette may generally include a promoter operably linked to the polynucleotide, a transcription termination signal, a ribosome binding site, and a translation termination signal.
- the expression cassette may be in the form of an expression vector capable of self-replicating.
- the polynucleotide may be introduced into a host cell in its own form and operably linked to a sequence required for expression in the host cell, but is not limited thereto.
- operably linked in the present application means that the gene sequence is functionally linked to a promoter sequence that initiates and mediates transcription of a polynucleotide encoding a protein of interest herein.
- the method of transforming the vector of the present application includes any method of introducing a nucleic acid into a cell, and may be performed by selecting an appropriate standard technique as known in the art depending on the host cell. For example, electroporation, calcium phosphate (CaPO 4 ) precipitation, calcium chloride (CaCl 2 ) precipitation, microinjection, polyethylene glycol (PEG) method, DEAE-dextran method, cationic liposome method, and Lithium acetate-DMSO method, etc., but is not limited thereto.
- microorganism producing L-histidine includes both wild-type microorganisms or microorganisms that have undergone natural or artificial genetic modification, and naturally has L-histidine-producing ability or L-histidine-producing ability It may mean a microorganism to which L-histidine-producing ability is imparted to the missing parent strain. Microorganisms whose specific mechanisms are weakened or strengthened due to reasons such as insertion of an external gene or enhancement or inactivation of an intrinsic gene, and a microorganism whose genetic mutation or activity is enhanced for the production of the desired L-histidine. I can.
- the microorganism producing the L-histidine may be a microorganism having enhanced glycine transporter activity.
- the restriction of the feedback of the histidine biosynthetic enzyme is suppressed, the enzymes involved in the histidine biosynthesis pathway are strengthened or inhibited, or the activity of the enzyme or protein that does not affect histidine biosynthesis is inactivated, thereby preventing metabolism to the histidine biosynthetic pathway.
- It may be a microorganism that produces histidine by smoothing it.
- the activity of the CycA protein is enhanced, or the HisG polypeptide is additionally mutated to inhibit the feedback restriction of the histidine biosynthesis pathway, or histidine biosynthesis including hisE, hisG, hisA, hisF, hisI, hisD, hisC, hisB, hisN
- It may be a microorganism having enhanced expression of one or more of the genes encoding the enzyme group of the pathway.
- inactivating enzymes in the histidine decomposition pathway inactivating the activity of proteins or enzymes on the pathways that consume intermediates, cofactors, or energy sources on the histidine biosynthetic pathway, or inactivate proteins that introduce the target product, histidine. It may be an inactivated microorganism.
- gamma-aminobutyrate permease NCgl1108 may be an inactivated microorganism.
- it may be a microorganism in which the activity of a protein or enzyme that is not associated with the growth of microorganisms or histidine biosynthesis is inactivated. More specifically, it may be a microorganism that weakens the activity of formyltetrahydrofolate deformylase (PurU), or transposase (NCgl2131), which does not affect the growth of microorganisms and biosynthesis of L-histidine. have.
- PurU formyltetrahydrofolate deformylase
- NCgl2131 transposase
- activation of protein activity means that the expression of an enzyme or protein is not expressed at all compared to a natural wild-type strain, a parent strain, or a strain in which the corresponding protein is unmodified. Means that. In this case, the decrease is when the activity of the protein is decreased compared to the activity of the protein originally possessed by the microorganism due to mutation of the gene encoding the protein, modification of the expression control sequence, or deletion of a part or all of the gene, and the gene encoding it In the case where the overall protein activity level in the cell is lower than that of the native strain or the strain before transformation due to inhibition of expression of or translation inhibition, the concept includes a combination thereof.
- the inactivation can be achieved by applying various methods well known in the art.
- the method include: 1) a method of deleting all or part of the gene encoding the protein; 2) modification of the expression control sequence to reduce the expression of the gene encoding the protein, 3) modification of the gene sequence encoding the protein so that the activity of the protein is removed or weakened, 4) the gene encoding the protein Introduction of antisense oligonucleotides (eg, antisense RNA) that complementarily bind to the transcript of 5)
- a secondary structure is formed by adding a sequence complementary to the sine-Dalgarno sequence to the front of the sine-Dalgarno sequence of the gene encoding the protein, thereby making it impossible to attach a ribosome.
- the microorganism of the present application may be any microorganism including the glycine transporter and capable of producing L-histidine.
- the "microorganism capable of producing L-histidine” may be used interchangeably with “a microorganism producing L-histidine", “a microorganism having L-histidine producing ability”, and “a microorganism for producing L-histidine”.
- the microorganism producing histidine of the present application may have additionally enhanced activity of a glycine-degrading protein.
- the "microorganisms producing histidine” and “enhancing the activity of proteins” are as described above.
- glycine degrading protein of the present application is a protein directly or indirectly involved in the glycine decomposition pathway, and each protein constituting the "glycine cleavage system (GCV)", or a complex of the proteins Or it may be used to mean the glycine decomposition system itself.
- GCV glycine cleavage system
- the glycine degrading protein comprises T-protein (GcvT), P-protein (GcvP), L-protein (GcvL), H-protein (GcvH), and LipB, a coenzyme of the glycine degrading system.
- LipA may be any one or more proteins selected from the group consisting of, but is not limited thereto (John E. Cronan, Microbiology and Molecular Biology Reviews., 13 April 2016).
- the glycine-decomposing protein may be derived from a microorganism of the genus Corynebacterium, specifically Corynebacterium ammoniagenes, but is not limited thereto.
- the GcvP protein is SEQ ID NO: 26
- GcvT protein is SEQ ID NO: 27
- GcvH is SEQ ID NO: 28
- LipA protein is SEQ ID NO: 29
- LipB protein is SEQ ID NO: 30, or 70% or more, respectively, or It may have identity, but is not limited thereto.
- the GcvP protein comprises the amino acid sequence of SEQ ID NO: 26, or at least 70%, 75%, 80%, 85%, 86%, 87%, 88%, 89% with the amino acid sequence of SEQ ID NO: 26, Amino acid sequences having 90%, 91%, 92%, 93%, 94%, 95%, 96%, 97%, 98% or 99% homology or identity may be included.
- a probe that can be prepared from a known gene sequence for example, a polypeptide encoded by a polynucleotide hybridized under stringent conditions with a complementary sequence to all or part of the nucleotide sequence encoding the polypeptide, glycine digestion
- a polypeptide having an activity may also be included without limitation.
- the homology or identity is as described above.
- the term "the genus of Corynebacterium microorganisms that produce L-histidine” means a microorganism that produces L-histidine, and the genus of the microorganisms may mean a microorganism belonging to the genus Corynebacterium. .
- the microorganism producing the L-histidine is as described above.
- the microorganism of the genus Corynebacterium having L-histidine-producing ability is enhanced with the activity of the glycine transporter of the present application or transformed with a vector containing a gene encoding the glycine transporter, It may mean a microorganism of the genus Corynebacterium that has improved L-histidine production capability. In addition, it may refer to a microorganism of the genus Corynebacterium whose activity of the glycine-degrading protein is enhanced or transformed with a vector containing a gene encoding the glycine-degrading protein to have improved L-histidine production capacity. .
- microorganism of the genus Corynebacterium that has improved L-histidine-producing ability refers to a microorganism having improved L-histidine-producing ability than a parent strain or an unmodified microorganism before transformation.
- The'unmodified microorganism' is a native strain of the genus Corynebacterium itself, or a microorganism that does not contain the gene encoding the glycine transporter, or is not transformed with a vector containing the gene encoding the glycine transporter. Means microorganisms.
- the microorganism of the genus Corynebacterium may include all microorganisms of the genus Corynebacterium. Specifically, Corynebacterium glutamicum, Corynebacterium crudilactis, Corynebacterium deserti, Corynebacterium deserti, Corynebacterium efficiens , Corynebacterium callunae, Corynebacterium stationis, Corynebacterium singulare, Corynebacterium halotolerans, Corynebacterium Corynebacterium striatum, Corynebacterium ammoniagenes, Corynebacterium pollutisoli, Corynebacterium imitans, Corynebacterium testudinoris (Corynebacterium testudinoris) or Corynebacterium flavescens, and more specifically Corynebacterium glutamicum.
- Another aspect of the present application provides a composition for producing L-histidine, including the microorganism for producing L-histidine of the present application.
- the composition for producing L-histidine may mean a composition capable of producing L-histidine by a microorganism producing L-histidine of the present application.
- the composition includes a microorganism that produces the L-histidine, and may include an additional component capable of producing histidine using the strain without limitation. Additional components capable of producing the histidine may further include, for example, any suitable excipients commonly used in fermentation compositions, or components of the medium. Such excipients may be, for example, a preservative, a wetting agent, a dispersing agent, a suspending agent, a buffering agent, a stabilizing agent, or an isotonic agent, but are not limited thereto.
- Another aspect of the present application provides a use of a microorganism of the genus Corynebacterium with enhanced activity of a glycine transporter for production of L-histidine.
- Glycine transporter “enhancing activity” or “microorganisms of the genus Corynebacterium” are as described above.
- Another aspect of the present application provides a method for preparing L-histidine comprising the step of culturing the microorganism.
- the medium and other culture conditions used for culturing the microorganisms of the present application may be used without particular limitation as long as it is a medium used for culturing the microorganisms of the genus Corynebacterium.
- the microorganisms of the present application are suitable carbon sources, It can be cultured while controlling temperature, pH, etc. under aerobic or anaerobic conditions in a conventional medium containing nitrogen sources, personnel, inorganic compounds, amino acids and/or vitamins.
- the carbon source includes carbohydrates such as glucose, fructose, sucrose, and maltose; Alcohols such as sugar alcohol and glycerol; Fatty acids such as palmitic acid, stearic acid, and linoleic acid; Organic acids such as pyruvic acid, lactic acid, acetic acid, and citric acid; Amino acids such as glutamic acid, methionine, and lysine may be included, but are not limited thereto.
- carbohydrates such as glucose, fructose, sucrose, and maltose
- Alcohols such as sugar alcohol and glycerol
- Fatty acids such as palmitic acid, stearic acid, and linoleic acid
- Organic acids such as pyruvic acid, lactic acid, acetic acid, and citric acid
- Amino acids such as glutamic acid, methionine, and lysine may be included, but are not limited thereto.
- natural organic nutrients such as starch hydrolyzate, molasses, black strap molasses, rice winter, cassava, sugarcane residue and corn steep liquor can be used, and sterilized pretreated molasses (ie, molasses converted to reducing sugar), etc.
- Carbohydrates can be used, and other appropriate amounts of carbon sources can be used in various ways without limitation. These carbon sources may be used alone or in combination of two or more.
- nitrogen source examples include inorganic nitrogen sources such as ammonia, ammonium sulfate, ammonium chloride, ammonium acetate, ammonium phosphate, ammonium carbonate, and ammonium nitrate; Amino acids such as glutamic acid, methionine, glutamine, etc., organic nitrogen sources such as peptone, NZ-amine, meat extract, yeast extract, malt extract, corn steep liquor, casein hydrolyzate, fish or its degradation products, skim soybean cake or its degradation products, etc. Can be used. These nitrogen sources may be used alone or in combination of two or more, but are not limited thereto.
- inorganic nitrogen sources such as ammonia, ammonium sulfate, ammonium chloride, ammonium acetate, ammonium phosphate, ammonium carbonate, and ammonium nitrate
- Amino acids such as glutamic acid, methionine, glutamine, etc.
- organic nitrogen sources such as peptone, NZ-amine,
- the personnel may include first potassium phosphate, second potassium phosphate, or a sodium-containing salt corresponding thereto.
- the inorganic compound sodium chloride, calcium chloride, iron chloride, magnesium sulfate, iron sulfate, manganese sulfate, calcium carbonate, and the like may be used.
- the medium may contain vitamins and/or suitable precursors.
- the medium or precursor may be added to the culture in a batch or continuous manner, but is not limited thereto.
- a compound such as ammonium hydroxide, potassium hydroxide, ammonia, phosphoric acid, or sulfuric acid may be added to the culture in an appropriate manner during the culture of the microorganism to adjust the pH of the culture.
- an antifoaming agent such as fatty acid polyglycol ester can be used to suppress the generation of air bubbles.
- oxygen or oxygen-containing gas may be injected into the culture, or nitrogen, hydrogen or carbon dioxide gas may be injected without the injection of gas to maintain the anaerobic and microaerobic state.
- the temperature of the culture may be 25° C. to 40° C., and more specifically, 28° C. to 37° C., but is not limited thereto.
- the cultivation period may be continued until the production amount of the desired useful substance is obtained, and specifically, may be 1 to 100 hours, but is not limited thereto.
- the L-histidine production method may include the step of recovering L-histidine from at least one material selected from the microorganism, the medium, a culture thereof, a supernatant of the culture, an extract of the culture, and a lysate of the microorganism after the culturing step. have.
- the target substance, L-histidine may be recovered from the culture medium using a suitable method known in the art according to the method of culturing the microorganism of the present application, for example, a batch, continuous, or fed-batch culture method.
- a suitable method known in the art for example, a batch, continuous, or fed-batch culture method.
- methods such as precipitation, centrifugation, filtration, chromatography, and crystallization may be used.
- the culture medium may be centrifuged at a low speed to remove biomass, and the resulting supernatant may be separated through ion exchange chromatography, but is not limited thereto.
- the recovery step may include a purification process.
- the mutation of microorganisms was induced using the following method.
- a mutant strain was obtained using the histidine-producing strain KCCM11795P (Korea Patent Application No. 10-2016-0030092) produced through NTG treatment derived from Corynebacterium glutamicum ATCC13032.
- the KCCM11795P strain was cultured in an activation medium for 16 hours, the activated strain was inoculated into a seed medium, and cultured for 14 hours, and 5 ml of the culture solution was recovered. After washing the recovered culture solution with 100 mM citric buffer, NTG (N-Methyl-N'-nitro-N-nitrosoguanidine) was added to a final concentration of 200 mg/L, and then treated for 20 minutes. And washed with 100 mM phosphate buffer. As a result of calculating the mortality rate by spreading the strain treated with NTG on a minimal medium, the mortality rate was 85%.
- Glucose 5% Bactopeptone 1%, Sodium Chloride 0.25%, Yeast Extract 1%, Urea 0.4%, pH 7.2
- each strain was inoculated into a 250 ml corner-baffle flask containing 25 ml of the seed medium, and cultured with shaking at 30° C. for 20 hours and 200 rpm. Then, 1 ml of the seed culture was inoculated into a 250 ml corner-baffle flask containing 25 ml of the production medium, and cultured with shaking at 30° C. for 24 hours and 200 rpm. After completion of the culture, the production of L-histidine and L-glycine was measured by HPLC.
- Glucose 5% ammonium sulfate 2%, potassium monophosphate 0.1%, magnesium sulfate heptahydrate 0.05%, CSL (corn immersion solution) 2.0%, biotin 200 ⁇ g/L, calcium carbonate, pH 7.2,
- the strain CA14-0682 an artificial mutant strain having resistance to high concentration TRA, has a 15% yield of L-histidine-producing ability.
- the CA14-0682 strain was safely deposited with the Korea Microorganism Conservation Center (KCCM) and was given a deposit number as KCCM 80179.
- KCCM Korea Microorganism Conservation Center
- Example 2 Construction of a glycine transporter (CycA (Cam)) introduction vector derived from Corynebacterium ammonia gene
- cycA (cam), SEQ ID NO: 2) encoding the CycA protein (hereinafter, CycA (Cam), SEQ ID NO: 1) derived from Corynebacterium ammonia gene, is inserted into the Corynebacterium glutamicum chromosome.
- purU was used as an insertion site in Corynebacterium glutamicum (Journal of Biotechnology 104, 5-25 Jorn Kalinowski et al, 2003).
- PCR was performed using a primer pair of SEQ ID NO: 3 and SEQ ID NO: 4, and SEQ ID NO: 5 and SEQ ID NO: 6 using the chromosome of ATCC13032 as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as a polymerase for the PCR reaction, and PCR conditions were denaturing 95° C., 30 seconds; Annealing 55° C., 30 seconds; And polymerization reaction at 72° C. and 2 minutes were repeated 28 times, and then polymerization reaction was performed at 72° C. for 5 minutes.
- DNA fragments of 1606 bp del-purU (SEQ ID NO: 7) and 1625 bp del-purU (SEQ ID NO: 8) were obtained, respectively.
- the obtained DNA product was purified using QIAGEN's PCR Purification kit, and then cloned using the pDZ (Korean Registered Patent No. 10-0924065) vector and TaKaRa's Infusion Cloning Kit, thereby purU deletion and target gene insertion vector pDZ ⁇ purU was prepared.
- a promoter-linked cycA (Cam) DNA fragment (hereinafter, Pn-cycA (Cam))
- the primers of SEQ ID NO: 9 and SEQ ID NO: 10 were used using the Corynebacterium ammoniagenes ATCC 6872 chromosome as a template. Then, PCR was performed. PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as a polymerase for the PCR reaction, and PCR conditions were denaturing 95° C., 30 seconds; Annealing 55° C., 30 seconds; And polymerization reaction at 72° C. and 90 seconds were repeated 28 times, followed by polymerization at 72° C. for 5 minutes.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as a polymerase for the PCR reaction, and PCR conditions were denaturing 95° C., 30 seconds; Annealing 55° C., 30 seconds; And polymerization reaction at 72
- Example 3 Preparation of strains for introducing glycine transporter derived from CA14-0682 strain and evaluation of histidine production ability
- the vector pDZ ⁇ purU::Pn-cycA (cam) prepared in Example 2 was transformed into CA14-0682 strain, and the purU gene on the chromosome was replaced in the form of Pn-cycA (cam) through a secondary crossover process.
- the prepared CA14-0682 ⁇ purU strain, CA14-0682 ⁇ purU::Pn-cycA (Cam) strain was cultured by the method performed in Example 1 to confirm the L-histidine production ability and L-glycine production amount.
- the parent strain CA14-0682 showed the production ability of L-histidine 14.85 g/L and L-glycine 7.41 g/L, while the purU-deficient strain had the same level of L-histidine production ability than the parent strain, whereas CA14-0682 ⁇ purU ::Pn-cycA(Cam) strain increased L-histidine production capacity by 4.3% and L-glycine production decreased by 13.8%.
- L-histidine production capacity was increased when L-glycine from outside the cell was introduced into the cell through the introduction of a glycine influx gene.
- cycA a recombinant vector overexpressing cycA (Cam) was constructed.
- the known promoter pcj7 derived from a microorganism of the genus Corynebacterium (Korea Patent Registration No. 10-0620092) and a promoter of the gene glyA encoding a known serine hydroxymethyltransferase (hereinafter, PglyA) were used.
- PCR was performed using p117-cj7-gfp containing pcj7 as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR reaction was denatured using the primers of SEQ ID NO: 12 and SEQ ID NO: 13 at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 30 seconds, and then polymerization was performed at 72°C for 1 minute.
- the PCR product amplified therefrom was purified using QIAGEN's PCR Purification kit to obtain a pcj7 fragment having a size of 350bp.
- PCR was performed using the Corynebacterium ammoniagenes ATCC 6872 chromosome as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as a polymerase for the PCR reaction, and the PCR reaction was denatured using the primers of SEQ ID NO: 14 and SEQ ID NO: 10 at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 30 seconds, and then polymerization was performed at 72°C for 1 minute.
- the PCR product amplified therefrom was purified using a PCR Purification kit from QIAGEN to obtain a cycA(Cam) fragment containing a part of the pcj7 sequence at 5′ of 1647bp size.
- fusion PCR was performed using the primers of SEQ ID NO: 12 and SEQ ID NO: 10. PCR reaction was denatured at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And polymerization reaction at 72° C. and 2 minutes were repeated 28 times, and then polymerization reaction was performed at 72° C. for 5 minutes. As a result, a 1964 bp pcj7-cycA (Cam) gene fragment was obtained, and the amplified product was purified using a PCR Purification kit from QIAGEN and used as an insert DNA fragment for vector construction (SEQ ID NO: 15).
- the obtained DNA product is purified using QIAGEN's PCR Purification kit, and then cloned using the pDZ ⁇ purU vector and TaKaRa's Infusion Cloning Kit to replace the purU gene with the pcj7-cycA(Cam) gene. ::pcj7-cycA(Cam) was produced.
- PCR was performed using the chromosome of ATCC13032 as a template to obtain a PglyA DNA fragment.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as a polymerase for the PCR reaction, and the PCR reaction was denatured using the primers of SEQ ID NO: 16 and SEQ ID NO: 17 at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 30 seconds, and then polymerization was performed at 72°C for 1 minute.
- the PCR product amplified therefrom was purified using QIAGEN's PCR Purification kit to obtain a PglyA fragment having a size of 340 bp.
- PCR was performed using the Corynebacterium ammoniagenes ATCC 6872 chromosome as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as a polymerase for the PCR reaction, and the PCR reaction was denatured using the primers of SEQ ID NO: 18 and SEQ ID NO: 10 at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 30 seconds, and then polymerization was performed at 72°C for 1 minute.
- the PCR product amplified therefrom was purified using QIAGEN's PCR Purification kit to obtain a cycA(Cam) fragment containing a part of the PglyA sequence at 5'of 1647bp size.
- fusion PCR was performed using the primers of SEQ ID NO: 16 and SEQ ID NO: 10. PCR reaction was denatured at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And polymerization reaction at 72° C. and 2 minutes were repeated 28 times, and then polymerization reaction was performed at 72° C. for 5 minutes. As a result, a 1963bp PglyA-cycA(Cam) gene fragment was obtained, and the amplification product was purified using a PCR Purification kit from QIAGEN, and used as an insert DNA fragment for vector construction (SEQ ID NO: 19).
- the obtained DNA product is purified using QIAGEN's PCR Purification kit, and then cloned using the pDZ ⁇ purU vector and TaKaRa's Infusion Cloning Kit to replace the purU gene with the PglyA-cycA (Cam) gene. ::PglyA-cycA (Cam) was produced.
- CycA protein derived from Escherichia coli K-12 (hereinafter, CycA (Eco), SEQ ID NO: 20) previously known to compare the activity of the CycA protein derived from Corynebacterium ammoniagenes (Microbiology, 141 (Pt 1); 133-40, 1995) gene encoding cycA (hereinafter, cycA (Eco), SEQ ID NO: 21) was operatively linked to pcj7 to introduce a vector.
- PCR was performed using p117-cj7-gfp containing pcj7 as a template.
- PfuUltra TM high-reliability DNA polymerase (Stratagene) was used as a polymerase for the PCR reaction, and the PCR reaction was denatured using the primers of SEQ ID NO: 12 and SEQ ID NO: 22 at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 30 seconds, and then polymerization was performed at 72°C for 1 minute.
- the PCR product amplified therefrom was purified using QIAGEN's PCR Purification kit to obtain a pcj7 fragment having a size of 350bp.
- PCR was performed using primers of SEQ ID NO: 23 and SEQ ID NO: 24 using the E. coli K-12 W3110 chromosome as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as a polymerase for the PCR reaction, and PCR conditions were denaturing 95° C., 30 seconds; Annealing 55° C., 30 seconds; And after the polymerization reaction was repeated 28 times at 72°C for 1 minute, polymerization was performed at 72°C for 5 minutes.
- a 1659 bp cycA (Eco) gene fragment was obtained, and the amplified product was purified using a PCR Purification kit from QIAGEN and used as an insert DNA fragment for vector construction.
- fusion PCR was performed using the primers of SEQ ID NO: 12 and SEQ ID NO: 24. PCR reaction was denatured at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And polymerization reaction at 72° C. and 90 seconds were repeated 28 times, followed by polymerization at 72° C. for 5 minutes. As a result, a 1985 bp pcj7-cycA (Eco) gene fragment was obtained (SEQ ID NO: 25).
- the amplification product is purified using QIAGEN's PCR Purification kit, and then cloned into pDZ ⁇ purU vector using TaKaRa's Infusion Cloning Kit according to the manual provided, thereby replacing the purU gene with the pcj7-cycA(Eco) gene. ::pcj7-cycA (Eco) was produced.
- Example 6 CA14-0682 strain-derived cycA (Cam) or cycA (Eco) overexpressing strain production and histidine production ability comparison
- CA14-0682 strain as a parent strain, four vectors (pDZ ⁇ purU, pDZ ⁇ purU::pcj7-cycA(Cam), pDZ ⁇ purU::PglyA-cycA(Cam)) designed to produce cycA (Cam) or cycA (Eco) overexpressing strains , pDZ ⁇ purU::pcj7-cycA (Eco)) was transformed into CA14-0682 strain by electroporation, respectively, and purU deletion on chromosome and pcj7-cycA (Cam) or PglyA-cycA (Cam) through a secondary crossover process Alternatively, a strain substituted in the form of pcj7-cycA (Eco) was obtained.
- CA14-0682 ⁇ purU::pcj7-cycA(Eco) strain into which E. coli-derived cycA was introduced had little Gly influx and showed less than the same level of histidine-producing ability compared to the parent strain.
- CA14-0682 ⁇ purU::pcj7-cycA(Cam) strain and CA14-0682 ⁇ purU::PglyA_cycA(Cam) strain in which cycA derived from Corynebacterium ammoniagenes was fortified and introduced Gly production ability decreased, and histidine production ability was poor.
- GCV system Glycine Cleavage System
- gcvP-gcvT gcvH-lipB-lipA
- gcvPT Corynebacterium ammoniagenes chromosome
- gcvH-lipBA Corynebacterium ammoniagenes chromosome
- PCR was performed using the primer pairs of SEQ ID NO: 36 and SEQ ID NO: 37, and SEQ ID NO: 38 and SEQ ID NO: 39 using the ATCC13032 chromosome as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as a polymerase for the PCR reaction, and PCR conditions were denaturing 95° C., 30 seconds; Annealing 55° C., 30 seconds; And polymerization reaction at 72° C. and 2 minutes were repeated 28 times, and then polymerization reaction was performed at 72° C. for 5 minutes.
- DNA fragments of 531bp del-N2131L (SEQ ID NO: 40) and 555bp del-N2131R (SEQ ID NO: 41) were obtained, respectively.
- the obtained DNA product was purified using QIAGEN's PCR Purification kit, and then cloned using a pDZ vector and TaKaRa's Infusion Cloning Kit to prepare a vector for NCgl2131 gene deletion and target gene insertion, pDZ ⁇ N2131.
- PCR was performed using the primers of SEQ ID NO: 42 and SEQ ID NO: 43 using the Corynebacterium ammoniagenes ATCC 6872 chromosome as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as a polymerase for the PCR reaction, and PCR conditions were denaturing 95° C., 30 seconds; Annealing 55° C., 30 seconds; And polymerization reaction at 72° C. and 5 minutes were repeated 28 times, and then polymerization reaction was performed at 72° C. for 7 minutes.
- a 4499 bp Pn_gcvPT (Cam) gene fragment including a promoter was obtained, and the amplification product was purified using a PCR Purification kit from QIAGEN and used as an insertion DNA fragment for vector construction (SEQ ID NO: 44).
- Pn_gcvH-lipBA Cam
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as a polymerase for the PCR reaction, and PCR conditions were denaturing 95° C., 30 seconds; Annealing 55° C., 30 seconds; And after the polymerization reaction was repeated 28 times at 72°C for 1 minute, polymerization was performed at 72°C for 7 minutes.
- fusion PCR was performed using the primers of SEQ ID NO: 42 and SEQ ID NO: 46. PCR reaction was denatured at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 10 minutes, and then polymerization was performed at 72°C for 12 minutes.
- Example 8 CA14-0682 strain-derived glycine degradation system and glycine transporter-introduced strain production and histidine production ability evaluation
- the vectors pDZ ⁇ N2131 and pDZ ⁇ N2131::GCV (Cam) prepared in Example 7 were transformed into CA14-0682 strain and CA14-0682-cycA (Cam) strain, and the NCgl2131 gene deletion strain (CA14- 0682-cycA(Cam) ⁇ N2131), a strain introduced with a glycine digestion system alone, and two strains in which both a glycine digestion system and a glycine transporter were introduced (CA14-0682 ⁇ N2131::GCV(Cam), CA14-0682-cycA(Cam) ⁇ N2131) ::GCV(Cam)) was produced.
- CA14-0682-cycA(Cam) ⁇ N2131 strain in which only the glycine influxer cycA(Cam) was introduced, increased histidine production by 7.6% and glycine production by 10.6% compared to CA14-0682 strain, and CA14- in Table 3 0682 ⁇ purU::PglyA_cycA(Cam) (named CA14-0682-cycA(Cam)) was confirmed at the same level as the strain result.
- CA14-0682 ⁇ N2131::GCV(Cam) strain into which the glycine degradation system was introduced, histidine production was increased by 9.8% and glycine production decreased by 36.8% compared to the CA14-0682 strain.
- the CA14-0682-cycA(Cam) ⁇ N2131::GCV(Cam) strain in which GCV was added to the CA14-0682-cycA(Cam) ⁇ N2131 strain, increased histidine production by 13.7% and glycine production by 69.1% compared to the parent strain. Decreased.
- the first enzyme in the L-histidine biosynthetic pathway the 233th and 235th amino acids from the N-terminus of HisG were added from glycine to histidine (hereinafter, G233H mutation), threonine was simultaneously substituted with glutamine (hereinafter, T235Q) (SEQ ID NO: 48) (ACS Synth. Biol., 2014, 3 (1), pp 21-29).
- residues 233 and 235 of the hisG polypeptide using the primers of SEQ ID NO: 49 and SEQ ID NO: 50 using the Corynebacterium glutamicum ATCC13032 chromosomal DNA as a template to create a vector for inserting the hisG polypeptide mutation.
- the upstream region (hereinafter, G233H, T235Q-5'), using the primers of SEQ ID NO: 51 and SEQ ID NO: 52, the downstream region of residues 233 and 235 of the hisG polypeptide (hereinafter, G233H, T235Q -3') was obtained through PCR.
- Solg TM Pfu-X DNA polymerase As the polymerase, Solg TM Pfu-X DNA polymerase was used, and PCR amplification conditions were after denaturation at 95°C for 5 minutes, denaturation at 95°C for 30 seconds, annealing at 60°C for 30 seconds, and polymerization at 72°C for 60 seconds. , Polymerization was performed at 72° C. for 5 minutes.
- the amplified G233H,T235Q-5' fragment and G233H,T235Q-3' fragment were combined with pDZ and Gibson assembly (DG Gibson et al., NATURE METHODS, VOL.6 NO.5, MAY 2009, NEBuilder HiFi DNA Assembly Master Mix) method.
- the hisG polypeptide mutant introduction vector pDZ-hisG was prepared by cloning using.
- the prepared pDZ-hisG (G233H, T235Q) vector was transformed into a wild-type Corynebacterium glutamicum ATCC13032 strain by electroporation, and then amino acids 233 and 235 of the HisG polypeptide on the chromosome through a second crossover process were respectively Glycine to histidine and threonine to glutamine was replaced with a strain was obtained.
- the genetic manipulation was confirmed through PCR and sequencing using SEQ ID NO: 53 and SEQ ID NO: 54, which can amplify the external regions of the homologous recombination upstream region and downstream region into which the gene was inserted, respectively, and this was named CA14-0011. .
- biosynthetic genes separated into a total of four operons were produced and introduced into clusters in which promoters were substituted.
- biosynthetic genes separated into a total of four operons were previously known as three synthetic promoters.
- lysCP1 Korea Patent Registration No. 10-0930203
- pcj7 or SPL13 (Korea Registration Patent No. 10-1783170 B1)
- gapA gene promoter and operably linked, and each operon was clustered and introduced at once.
- the insertion site was the Ncgl1108 gene encoding gamma-aminobutyrate permase (Microb Biotechnol. 2014 Jan;7(1):5-25).
- NCgl1108 Upstream region (hereinafter, N1108-5') was identified using the primers of SEQ ID NO: 55 and SEQ ID NO: 56 using Corynebacterium glutamicum ATCC13032 chromosomal DNA as a template, Using the primers of SEQ ID NO: 57 and SEQ ID NO: 58, a gene fragment of the Ncgl1108 downstream (Downsteam) region (hereinafter, N1108-3') was obtained through PCR.
- Solg TM Pfu-X DNA polymerase As the polymerase, Solg TM Pfu-X DNA polymerase was used, and PCR amplification conditions were after denaturation at 95°C for 5 minutes, denaturation at 95°C for 30 seconds, annealing at 60°C for 30 seconds, and polymerization at 72°C for 60 seconds. , Polymerization was carried out at 72° C. for 5 minutes.
- the amplified N1108-5' fragment and the N1108-3' fragment were cloned using the pDZ and Gibson assembly method to construct an NCgl1108 deletion vector pDZ ⁇ N1108 vector.
- the prepared pDZ- ⁇ NCgl1108 vector was transformed into CA14-0011 strain by electroporation, followed by a second crossover process to obtain a strain in which the NCgl1108 gene was disrupted on the chromosome.
- the genetic manipulation was confirmed through PCR and sequencing using SEQ ID NO: 59 and SEQ ID NO: 60, which can amplify the external regions of the homologous recombination upstream region and the downstream region where the gene is crushed, respectively, and this was named CA14-0736. .
- PCR was performed using the chromosome of the KCCM10919P strain (Korean Patent No. 10-0930203) as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as a polymerase for the PCR reaction, and the PCR reaction was denatured using the primers of SEQ ID NO: 61 and SEQ ID NO: 62 at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 30 seconds, and then polymerization was performed at 72°C for 1 minute.
- the PCR product amplified therefrom was purified using QIAGEN's PCR Purification kit to obtain a lysCP1 fragment.
- PCR was performed using the chromosome of CA14-0011 strain as a template. PCR reaction was performed by denaturing the primers of SEQ ID NO: 63 and SEQ ID NO: 64 at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And polymerization reaction at 72° C. and 2 minutes were repeated 28 times, and then polymerization reaction was performed at 72° C. for 5 minutes.
- the PCR product amplified therefrom was purified using QIAGEN's PCR Purification kit to obtain a hisE-hisG fragment.
- PCR was performed using the Corynebacterium glutamicum ATCC13032 chromosome as a template.
- PCR reaction was denatured using the primers of SEQ ID NO: 65 and SEQ ID NO: 66 at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And polymerization reaction at 72° C. and 2 minutes were repeated 28 times, and then polymerization reaction was performed at 72° C. for 5 minutes.
- the PCR product amplified therefrom was purified using QIAGEN's PCR Purification kit to obtain a PgapA fragment.
- PCR was performed using the chromosome of CA14-0011 as a template. PCR reaction was performed using the primers of SEQ ID NO: 67 and SEQ ID NO: 68, denatured at 95°C for 30 seconds; Annealing 55° C., 30 seconds; And polymerization reaction at 72° C. and 2 minutes were repeated 28 times, and then polymerization reaction was performed at 72° C. for 5 minutes.
- the PCR product amplified therefrom was purified using QIAGEN's PCR Purification kit to obtain a hisA-impA-hisF-hisI fragment.
- PCR was performed using SPL13 DNA as a template.
- PCR reaction was denatured using the primers of SEQ ID NO: 69 and SEQ ID NO: 70, 30 seconds; Annealing 55° C., 30 seconds; And after the polymerization reaction was repeated 28 times at 72°C for 1 minute, polymerization was performed at 72°C for 5 minutes.
- the PCR product amplified therefrom was purified using QIAGEN's PCR Purification kit to obtain an SPL13 DNA fragment.
- PCR was performed using p117-cj7-gfp containing pcj7 as a template.
- PfuUltra TM high-reliability DNA polymerase (Stratagene) was used as a polymerase for the PCR reaction, and the PCR reaction was denatured using the primers of SEQ ID NO: 71 and SEQ ID NO: 72 at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 30 seconds, and then polymerization was performed at 72°C for 1 minute.
- the PCR product amplified therefrom was purified using QIAGEN's PCR Purification kit to obtain a pcj7 fragment.
- PCR was performed using the chromosome of the CA14-0011 strain as a template. PCR reaction was performed using the primers of SEQ ID NO: 73 and SEQ ID NO: 74, denatured at 95°C for 30 seconds; Annealing 55° C., 30 seconds; And polymerization reaction at 72° C. and 5 minutes were repeated 28 times, and then polymerization reaction was performed at 72° C. for 5 minutes.
- the PCR product amplified therefrom was purified using QIAGEN's PCR Purification kit to obtain a hisD-hisC-hisB gene fragment.
- PCR was performed using the chromosome of the CA14-0011 strain as a template. PCR reaction was denatured using the primers of SEQ ID NO: 75 and SEQ ID NO: 76 at 95° C. for 30 seconds; Annealing 55° C., 30 seconds; And polymerization reaction at 72° C. and 5 minutes were repeated 28 times, and then polymerization reaction was performed at 72° C. for 5 minutes.
- the PCR product amplified therefrom was purified using QIAGEN's PCR Purification kit to obtain a cg0911-hisN gene fragment.
- the obtained lysCP1 DNA fragment, hisE-hisG DNA fragment, PgapA DNA fragment, hisA-impA-hisF-hisI DNA fragment, SPL13 DNA fragment, hisD-hisC-hisB DNA fragment, pcj7 DNA fragment, cg0911-hisN DNA fragment was pDZ- L-histidine biosynthesis enhanced cluster introduction vector pDZ- ⁇ Ncgl1108::lysCP1_hisEG-PgapA_hisA-impA-hisFI-SPL13_HisDCB-pcj7_cg0911-hisN was constructed by cloning using ⁇ Ncgl1108 vector and Gibson assembly method.
- the prepared pDZ- ⁇ Ncgl1108::lysCP1_hisEG-PgapA_hisA-impA-hisFI-SPL13_hisDCB-pcj7_cg0911-hisN vector was transformed by electroporation into CA14-0011 strain, followed by a secondary crossover process, and then the strain in which the biosynthetic gene was inserted on the chromosome Got it.
- the genetic manipulation was confirmed through PCR and genome sequencing using SEQ ID NO: 59 and SEQ ID NO: 60, which can amplify the external regions of the homologous recombination upstream region and downstream region into which the gene was inserted, respectively, and this was named CA14-0737. I did.
- the CA14-0737 strain was internationally deposited with the Korea Microbial Conservation Center (KCCM), an international depository under the Budapest Treaty, on November 27, 2018, and was given a deposit number as KCCM12411P.
- KCCM Korea Microbial Conservation Center
- Example 10 CA14-0737 strain-derived glycine transporter and glycine degradation system introduced strain production
- the constructed vector 4 types (pDZ ⁇ purU, pDZ ⁇ purU::PglyA-cycA(Cam), pDZ ⁇ purU::pcj7-cycA(Cam), pDZ ⁇ purU::pcj7-cycA(Eco)) CA14-0737
- the strain was transformed, and a purU gene deletion strain, a cycA (Cam) introduced strain, and a cycA (Eco) introduced strain were produced through a second cross-over process, which were CA14-0737 ⁇ purU, CA14-0737 ⁇ purU::PglyA-cycA(Cam) , CA14-0737 ⁇ purU::pcj7-cycA (Cam), CA14-0737 ⁇ purU::pcj7-cycA (Eco) were prepared.
- CA14-0737 88.4 100 4.11 2.21 CA14-0737 ⁇ purU 87.9 100 4.20 2.24 CA14-0737 ⁇ purU::PglyA-cycA(Cam) 87.4 100 4.93 1.90 CA14-0737 ⁇ purU::pcj7-cycA(Cam) 84.1 100 4.97 1.95 CA14-0737 ⁇ purU::pcj7-cycA(Eco) 88.9 100 4.29 2.20
- the CA14-0737 ⁇ purU::pcj7-cycA(Eco) strain into which E. coli-derived cycA was introduced showed almost no Gly influx and thus showed the same level of histidine-producing ability compared to the parent strain.
- the CA14-0737 ⁇ purU::pcj7-cycA(Cam) strain in which cycA derived from Corynebacterium ammoniagenes was fortified histidine production capacity increased by 20.9% compared to the parent strain, and glycine production was decreased by 11.8%. .
- CA14-0737 ⁇ purU::PglyA-cycA(Cam) strain was named CA14-0737-cycA(Cam).
- the vectors pDZ ⁇ N2131 and pDZ ⁇ N2131::GCV (Cam) prepared in Example 7 were transformed into CA14-0737 strain and CA14-0737-cycA (Cam) strain, and the NCgl2131 gene deletion strain (CA14-0737) through a second crossover process.
- -cycA(Cam) ⁇ N2131 a glycine decomposition system alone introduced strain and two strains into which both a glycine decomposing system and a glycine transporter were introduced (CA14-0737 ⁇ N2131::GCV(Cam), CA14-0737-cycA(Cam) ⁇ N2131: :GCV(Cam)) was produced.
- CA14-0737-cycA(Cam) ⁇ N2131 strain CA14-0737 ⁇ N2131::GCV(Cam) strain
- CA14-0737-cycA(Cam) ⁇ N2131::GCV(Cam) strain of L-histidine production and L-glycine In order to check the amount of production, it was cultured by the method performed in Example 1.
- CA14-0737-cycA(Cam) strain was named CA14-0777, and CA14-0737-cycA(Cam) ⁇ N2131::GCV(Cam)
- the strain was named CA14-0809, and the two strains were internationally deposited on April 15, 2019 with the Korea Microbial Conservation Center (KCCM), an international depository under the Budapest Treaty, and were given deposit numbers as KCCM12488P and KCCM12489P, respectively.
- KCCM Korea Microbial Conservation Center
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Abstract
Description
CA14-0682 균주의 L-히스티딘 및 L-글리신 생산량 | ||||
OD | 사용한 포도당 (g/L) | 히스티딘 생산량 (g/L) | 글리신 생산량 (g/L) | |
KCCM11795P | 110.2 | 100 | 2.99 | 1.41 |
CA14-0682 | 50.1 | 100 | 14.25 | 6.99 |
CA14-0682 유래 cycA(cam) 도입균주의 L-히스티딘 및 L-글리신 생산량 | ||||
OD | 사용한 포도당 (g/L) | 히스티딘 생산량 (g/L) | 글리신 생산량 (g/L) | |
CA14-0682 | 50.2 | 100 | 14.85 | 7.41 |
CA14-0682ΔpurU | 50.1 | 100 | 14.88 | 7.42 |
CA14-0682ΔpurU::Pn-cycA(Cam) | 49.7 | 100 | 15.49 | 6.51 |
CA14-0682 유래 cycA 도입균주의 L-히스티딘 및 L-글리신 생산량 | ||||
OD | 사용한 포도당 (g/L) | 히스티딘 생산량 (g/L) | 글리신 생산량 (g/L) | |
CA14-0682 | 50.3 | 100 | 15.11 | 7.46 |
CA14-0682ΔpurU | 50.5 | 100 | 15.05 | 7.42 |
CA14-0682ΔpurU::pcj7_cycA(Cam) | 40.1 | 100 | 16.18 | 5.99 |
CA14-0682ΔpurU::PglyA_cycA(Cam) | 44.7 | 100 | 16.14 | 5.89 |
CA14-0682ΔpurU::pcj7_cycA(Eco) | 51.3 | 100 | 15.01 | 7.25 |
CA14-0682 유래 cycA(cam) 및 글리신 분해시스템 도입균주의 L-히스티딘 및 L-글리신 생산량 | ||||
OD | 사용한 포도당 (g/L) | 히스티딘 생산량 (g/L) | 글리신 생산량 (g/L) | |
CA14-0682 | 53.6 | 100 | 15.05 | 7.47 |
CA14-0682- cycA(Cam)ΔN2131 | 45.1 | 100 | 16.19 | 6.68 |
CA14-0682ΔN2131::GCV(Cam) | 48.9 | 100 | 16.52 | 4.72 |
CA14-0682-cycA(Cam)ΔN2131::GCV(Cam) | 42.3 | 100 | 17.11 | 2.31 |
CA14-0737 유래 cycA 도입균주의 L-히스티딘 및 L-글리신 생산량 | ||||
OD | 사용한 포도당 (g/L) | 히스티딘 생산량 (g/L) | 글리신 생산량 (g/L) | |
CA14-0737 | 88.4 | 100 | 4.11 | 2.21 |
CA14-0737ΔpurU | 87.9 | 100 | 4.20 | 2.24 |
CA14-0737ΔpurU::PglyA-cycA(Cam) | 87.4 | 100 | 4.93 | 1.90 |
CA14-0737ΔpurU::pcj7-cycA(Cam) | 84.1 | 100 | 4.97 | 1.95 |
CA14-0737ΔpurU::pcj7-cycA(Eco) | 88.9 | 100 | 4.29 | 2.20 |
CA14-0737 유래 cycA(cam) 및 글리신 분해시스템 도입균주의 L-히스티딘 및 L-글리신 생산량 | ||||
OD | 사용한 포도당 (g/L) | 히스티딘 생산량 (g/L) | 글리신 생산량 (g/L) | |
CA14-0737 | 88.1 | 100 | 4.15 | 2.17 |
CA14-0737-cycA(Cam)ΔN2131 | 75.1 | 100 | 4.89 | 1.48 |
CA14-0737ΔN2131::GCV(Cam) | 78.2 | 100 | 5.42 | 0.94 |
CA14-0737-cycA(Cam)ΔN2131::GCV(Cam) | 71.3 | 100 | 5.97 | 0.46 |
Claims (12)
- 글리신 트랜스포터의 활성이 강화된, L-히스티딘을 생산하는 코리네박테리움 속 미생물.
- 제1항에 있어서, 상기 글리신 트랜스포터는 코리네박테리움 암모니아게네스(Corynebacterium ammoniagenes) 유래인, 미생물.
- 제1항에 있어서, 상기 글리신 트랜스포터 단백질은 CycA 단백질인, 미생물.
- 제1항에 있어서, 상기 글리신 트랜스포터는 서열번호 1 또는 이와 90% 이상의 서열 상동성을 갖는 아미노산 서열을 포함하는 것인, 미생물.
- 제1항에 있어서, 상기 미생물은 글리신 분해 단백질의 활성이 추가로 강화된, 미생물.
- 제1항에 있어서, 상기 글리신 분해 단백질은 GcvP, GcvT, GcvH, LipB 및 LipA로 구성된 군에서 선택되는 하나 이상의 단백질인, 미생물.
- 제6항에 있어서, 상기 글리신 분해 단백질은 코리네박테리움 암모니아게네스 유래인, 미생물.
- 제6항에 있어서, 상기 GcvP는 서열번호 26, GcvT 단백질은 서열번호 27, GcvH는 서열번호 28, LipA 단백질은 서열번호 29, LipB 단백질은 서열번호 30 또는 상기 서열번호와 각각 90% 이상의 상동성을 갖는 아미노산 서열을 포함하는 것인, 미생물.
- 제1항에 있어서, 상기 L-히스티딘을 생산하는 코리네박테리움 속 미생물은 코리네박테리움 글루타미쿰(Corynebacterium glutamicum)인, 미생물.
- 제1항 내지 제9항 중 한 항의 미생물을 포함하는 L-히스티딘 생산용 조성물.
- 제1항 내지 제9항 중 한 항의 미생물을 배지에서 배양하는 단계; 및상기 미생물 및 배지에서 L-히스티딘을 회수하는 단계를 포함하는, L-히스티딘 제조방법.
- 글리신 트랜스포터의 활성이 강화된 코리네박테리움 속 미생물의 L-히스티딘 생산 용도.
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WO2022005022A1 (ko) * | 2020-06-29 | 2022-01-06 | 씨제이제일제당 (주) | L-이소류신 생산능이 강화된 미생물 및 이를 이용한 l-이소류신 생산방법 |
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CN116254242B (zh) * | 2022-12-21 | 2024-01-30 | 江南大学 | 一种atp磷酸核苷转移酶突变体及产l-组氨酸的谷氨酸棒杆菌 |
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US20220205003A1 (en) | 2022-06-30 |
KR102204917B1 (ko) | 2021-01-20 |
KR20190065984A (ko) | 2019-06-12 |
JP2022529831A (ja) | 2022-06-24 |
AU2020262366B2 (en) | 2023-09-28 |
JP7394868B2 (ja) | 2023-12-08 |
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