WO2023249421A1 - L-히스티딘 배출 단백질 및 이를 이용한 l-히스티딘 생산 방법 - Google Patents
L-히스티딘 배출 단백질 및 이를 이용한 l-히스티딘 생산 방법 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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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/195—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from bacteria
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12P—FERMENTATION OR ENZYME-USING PROCESSES TO SYNTHESISE A DESIRED CHEMICAL COMPOUND OR COMPOSITION OR TO SEPARATE OPTICAL ISOMERS FROM A RACEMIC MIXTURE
- C12P13/00—Preparation of nitrogen-containing organic compounds
- C12P13/04—Alpha- or beta- amino acids
- C12P13/24—Proline; Hydroxyproline; Histidine
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
- C12R2001/01—Bacteria or Actinomycetales ; using bacteria or Actinomycetales
- C12R2001/15—Corynebacterium
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12R—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES C12C - C12Q, RELATING TO MICROORGANISMS
- C12R2001/00—Microorganisms ; Processes using microorganisms
- C12R2001/01—Bacteria or Actinomycetales ; using bacteria or Actinomycetales
- C12R2001/185—Escherichia
- C12R2001/19—Escherichia coli
Definitions
- This application relates to a novel protein with histidine excretion activity, an L-histidine producing microorganism modified to express the protein, and a method of producing L-histidine using the microorganism.
- L-Histidine is one of the 20 standard amino acids. From a nutritional point of view, adults do not require large amounts of it, but it is classified as an essential amino acid for 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 as a raw material for gastric ulcer treatments, circulatory system treatments, and amino acid solution preparations.
- L-histidine is especially abundant in hemoglobin, so it is mainly produced through protein hydrolysis extraction using blood meal.
- this method has disadvantages such as low efficiency and environmental pollution.
- PRPP phosphoribosyl pyrophosphate
- the purpose of the present application is (1) the amino acid corresponding to the 72nd amino acid residue of the amino acid sequence of SEQ ID NO: 43 is replaced with another amino acid, or
- Another object of the present application is to provide a microorganism containing the protein or a polynucleotide encoding the protein.
- Another object of the present application is to provide a composition for producing L-histidine containing the protein, a polynucleotide encoding the protein, or the microorganism.
- Another object of the present application is to provide a use of the protein, the polynucleotide encoding the protein, or the microorganism for producing L-histidine.
- Another object of the present application is to provide a use of the protein, the polynucleotide encoding the protein, or the microorganism for producing a composition for producing L-histidine.
- Another object of the present application is to provide a method for producing L-histidine, comprising culturing the microorganism in a medium.
- This application proposes that L-histidine production can be dramatically improved by discovering a variant of a histidine excretion protein with the ability to excrete L-histidine and expressing it in a microorganism with the ability to produce L-histidine.
- the protein may be a protein having a specific L-histidine excretion ability.
- the variant protein may be expressed as a variant L-histidine release protein.
- the variant protein may have AzlC family ABC transporter penetration activity.
- the variant protein is equivalent to a wild-type L-histidine export protein (e.g., AzlD domain-containing protein, AzlC family ABC transporter permease, etc.) Or, it may have a more enhanced L-histidine excretion activity.
- the AzlD domain-containing protein or the AzlC family ABC transporter permease protein may be derived from Helcobacillus massiliensis .
- the AzlD domain-containing protein derived from Helcobacillus massiriensis may be referred to as the HmaE protein (or HmaE), and the AzlC family ABC transporter permease protein derived from Helcobacillus massiriensis may be referred to as the HmaF protein (or HmaF).
- HmaE protein or HmaE
- HmaF protein or HmaF
- the variant protein (e.g., a variant protein of an AzlD domain-containing protein, specifically a variant protein of an AzlD domain-containing protein from Helcobacillus mairiensis) is identical to the AzlC family ABC transporter permease protein. It may be expressed together in operon genes. In one example, the variant protein may have L-histidine excretion activity by binding to the AzlC family ABC transporter permease protein.
- the variant protein may be a variant protein of the AzlC series ABC transporter permease protein derived from Helcobacillus massiliensis .
- the variant protein may be a variant protein in which one or more amino acid residues of the wild-type AzlC series ABC transporter permease protein derived from Helcobacillus marsiliensis are substituted, deleted, or inserted.
- the wild-type AzlC series ABC transporter permease protein derived from Helcobacillus massiriensis may include or consist of the amino acid sequence of SEQ ID NO: 43 (WP_055090792.1).
- the variant protein has the amino acid corresponding to (1) 72nd residue from the N-terminus in the amino acid sequence of SEQ ID NO: 43 replaced with a different amino acid, or
- Both (1) and (2) above may contain substituted amino acid sequences.
- Counting amino acids from the N-terminus in the amino acid sequence as described above may mean counting methionine (Met, M) translated from the start codon as the first amino acid.
- the mutant protein is an amino acid different from the original amino acid in the amino acid corresponding to the (1) 72nd residue from the N-terminus in the amino acid sequence of SEQ ID NO: 43, such as leucine (Leu, L), Arginine (Arg, R), histidine (His, H), lysine (Lys, K), aspartic acid (Asp, D), glutamic acid (Glu, E), serine (Ser, S), threonine (Thr, T), Asparagine (Asn, N), glutamine (Gln, Q), cysteine (Cys, C), glycine (Gly, G), proline (Pro, P), alanine (Ala, A), valine (Val, V), methionine (Met, M), phenylalanine (Phe, F), tyrosine (Tyr, Y), or tryptophan (Trp, W), or
- the amino acid corresponding to the 124th residue is a different amino acid, that is, an amino acid different from the original amino acid, such as valine, arginine, histidine, lysine, aspartic acid, glutamic acid, serine, threonine, asparagine, glutamine, cysteine, glycine, proline, Contains a sequence substituted with alanine, leucine, methionine, phenylalanine, tyrosine, or tryptophan, or
- the variant protein is one in which (1) the amino acid corresponding to the 72nd residue from the N-terminus in the amino acid sequence of SEQ ID NO: 43 is substituted with leucine, glycine, proline, alanine, valine, or methionine;
- residue 124 is substituted with valine, glycine, proline, alanine, leucine, or methionine;
- the variant protein may be one in which the amino acid corresponding to the 72nd residue from the N-terminus in the amino acid sequence of SEQ ID NO: 43 is substituted with leucine, and the amino acid corresponding to the 124th residue is substituted with valine.
- the variant proteins even if some amino acid sequences except those corresponding to the 72nd and/or 124th amino acid residues from the N-terminus of SEQ ID NO. 43 are deleted, modified, substituted, or added, they exhibit AzlC series ABC transporter permease activity. It is obvious that it can be included in the variant protein of the present application.
- the variant protein has at least 60%, 65%, 70%, 75%, 80%, 85%, 90%, or 91% of the amino acid sequence shown in SEQ ID NO: 43.
- an amino acid sequence having at least 92%, at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or at least 99.5% sequence homology or sequence identity In the amino acid sequence of SEQ ID NO: 43, from the N-terminus, (1) the amino acid corresponding to the 72nd residue is substituted with another amino acid, (2) the amino acid corresponding to the 124th residue is substituted with another amino acid, or (3) the above Both (1) and (2) may include substituted polypeptides.
- polypeptides that have sequence homology or sequence identity of 99% or more, or 99.5% or more and that have AzlC family ABC transporter permease activity may be included in the variant protein of the present application.
- the variant protein may include or consist of the amino acid sequence of SEQ ID NO: 56, but is not limited thereto.
- the variant protein consisting of the amino acid sequence of SEQ ID NO: 56 even if some amino acid sequences are deleted, modified, substituted, or added except for the amino acids corresponding to the 72nd and/or 124th residues from the N-terminus in the amino acid sequence of SEQ ID NO: 56.
- the AzlC family ABC transporter can be included in the variant protein of the present application as long as it exhibits permease activity.
- the variant protein has fixed amino acids corresponding to the 72nd and/or 124th residues from the N-terminus in the amino acid sequence of SEQ ID NO: 56, and is at least 60%, 65% identical to the amino acid sequence of SEQ ID NO: 56. More than 70%, more than 75%, more than 80%, more than 85%, more than 90%, more than 91%, more than 92%, more than 93%, more than 94%, more than 95%, more than 96%, more than 97%, It may include polypeptides having at least 98%, at least 99%, or at least 99.5% sequence homology or sequence identity.
- amino acid corresponding to the 72nd and/or 124th residue from the N-terminus in the amino acid sequence of SEQ ID NO: 56 is replaced with another amino acid, and is at least 60%, 65%, 70% identical to the amino acid sequence of SEQ ID NO: 56. or more, 75% or more, 80% or more, 85% or more, 90% or more, 91% or more, 92% or more, 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more,
- a polypeptide having AzlC family ABC transporter permease activity that has more than 99% or more than 99.5% homology or identity may be included in the variant protein of the present application.
- the mutant protein may have a more enhanced L-histidine excretion activity than the wild-type protein (eg, wild-type AzlD domain-containing protein).
- the mutant protein when expressed together with a wild-type AzlC family ABC transporter permease protein, the L-histidine excretion activity may be further enhanced.
- the wild-type L-histidine excretion protein is SEQ ID NO: 43 (wild-type AzlC family ABC transporter permease protein derived from Helcobacillus massiriensis), SEQ ID NO: 44 (wild-type AzlD domain-containing protein derived from Helcobacillus massiriensis), or a combination thereof. It may be a protein that has more than 60% sequence homology.
- the wild-type L-histidine release protein has SEQ ID NO: 43, 44, or a combination thereof and 60% or more, 65% or more, 70% or more, 75% or more, 80% or more, 85% or more, 90% or more It may have a homology of % or more, 91% or more, 92% or more, 93% or more, 94% or more, 95% or more, 96% or more, 97% or more, 98% or more, 99% or more, or 99.5% or more. .
- the protein represented by SEQ ID NO: 43 is encoded by the nucleic acid sequence of SEQ ID NO: 45
- the protein represented by SEQ ID NO: 44 is encoded by the nucleic acid sequence of SEQ ID NO: 46, or is expressed by SEQ ID NO: 43 and/or SEQ ID NO: 44.
- the protein may be encoded by the nucleic acid sequence of SEQ ID NO: 47 (which is an operon sequence fused at the overlapping region of the 3' end of SEQ ID NO: 45 and the 5' end of SEQ ID NO: 46).
- Another aspect provides a polynucleotide encoding (encoding) the variant protein.
- polynucleotide refers to a DNA or RNA strand of a certain length or more, which is a polymer of nucleotides in which nucleotide monomers are connected in a long chain by covalent bonds, and more specifically, the variant polypeptide. refers to a polynucleotide fragment encoding .
- the polynucleotide encoding the variant protein of the present application may include a base sequence encoding the amino acid sequence of SEQ ID NO: 56.
- a polynucleotide may be used interchangeably with “gene” or a polypeptide (may be used interchangeably with “protein”) “comprises, consists of a particular nucleic acid sequence or amino acid sequence,” “or expressed by a specific nucleic acid sequence or amino acid sequence” may mean that the polynucleotide or polypeptide essentially includes the specific nucleic acid sequence or amino acid sequence, and the original function and/or function of the polynucleotide or polypeptide or a “substantially equivalent sequence” in which a mutation (deletion, substitution, modification, and/or addition) is added to the specific nucleic acid sequence or amino acid sequence to the extent of maintaining the desired function (or a sequence that does not exclude the mutation) can be interpreted as).
- nucleic acid sequence or amino acid sequence provided herein can be modified by conventional mutagenesis methods, such as directed evolution and/or site-specific methods, to the extent of maintaining their original or desired function. It may include modifications made by site-directed mutagenesis, etc.
- saying that a polynucleotide or polypeptide “comprises or consists of a specific nucleic acid sequence or amino acid sequence” means that the polynucleotide or polypeptide (i) includes the specific nucleic acid sequence or amino acid sequence.
- Consists of or essentially contains an amino acid sequence having at least 93%, at least 94%, at least 95%, at least 96%, at least 97%, at least 98%, at least 99%, or at least 99.5% homology, and It may mean maintaining the function and/or the intended function.
- the desired function may refer to a function that grants or increases the L-histidine excretion activity and/or L-histidine production ability of a microorganism.
- nucleic acid sequence described herein is within a range that does not change the amino acid sequence and/or function of the protein expressed from the coding region, taking into account the preferred codon in microorganisms seeking to express the protein due to codon degeneracy. Various modifications can be made to the coding area within.
- identity refers to the degree of identity with a given nucleic acid sequence or amino acid sequence and can be expressed as a percentage (%).
- the literature algorithm BLAST see Karlin and Altschul, Pro. Natl. Acad. Sci. USA, 90, 5873, 1993
- FASTA Pearson
- BLASTN BLASTTN
- BLASTX BLASTX
- a polynucleotide comprising a specific nucleic acid sequence includes not only the specific nucleic acid sequence or a nucleic acid sequence substantially equivalent thereto, but also a polynucleotide fragment comprising a nucleic acid sequence complementary to the specific nucleic acid sequence. It can be interpreted as Specifically, the polynucleotide having the complementarity can be hybridized at a Tm value that can be appropriately adjusted by a person skilled in the art depending on the purpose, for example, a Tm value of 55°C, 60°C, 63°C, or 65°C, and analyzed under the conditions described below. : These conditions are specifically described in well-known literature.
- genes with high complementarity of 96% or more, 97% or more, 98% or more, 99% or more, or 99.5% or more are hybridized, and genes with lower complementarity are not hybridized, or normal Southern hybridization.
- washing conditions 60°C, 1x SSC (saline-sodium citrate buffer), and 0.1% (w/v) SDS (Sodium Dodecyl Sulfate); 60°C, 0.1x SSC, and 0.1% SDS; Alternatively, conditions of washing once, specifically 2 to 3 times, at a salt concentration and temperature equivalent to 68°C, 0.1x SSC, and 0.1% SDS may be listed, but are not limited thereto.
- Hybridization requires that two nucleotides have complementary sequences, or mismatches between bases may be allowed depending on the stringency of hybridization.
- the term “complementary” can be used to describe the relationship between nucleotide bases that are capable of hybridizing to each other.
- adenine is complementary to thymine and cytosine is complementary to guanine.
- the appropriate stringency to hybridize a polynucleotide depends on the length of the polynucleotide and the degree of complementarity, which are well known in the art (see Sambrook et al., supra, 9.50-9.51, 11.7-11.8).
- transformation refers to the process of introducing a specific polynucleotide or a vector containing the same into a host cell.
- the transformed polynucleotide may be inserted into a chromosome within the host cell or may be located outside the chromosome.
- transformation may be the introduction of a polynucleotide encoding a target protein (foreign protein) or a vector containing it into a host cell so that the protein encoded by the polynucleotide can be expressed within the host cell.
- the polynucleotide may include DNA and/or RNA encoding a target protein.
- the form in which it is introduced is not limited.
- the polynucleotide can be introduced into a 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 expression control elements such as a promoter, transcription termination signal, ribosome binding site, and/or 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.
- operably linked means that the expression control element (e.g., promoter) and the polynucleotide can perform transcriptional regulation (e.g., transcription initiation) of the polynucleotide encoding the target protein (foreign protein). It may mean that nucleotides are functionally linked. Operable linking can be performed using genetic recombination techniques known in the art, such as, but not limited to, conventional site-specific DNA cutting and ligation.
- the method of transforming the polynucleotide into a host cell can be performed by any method that introduces a nucleic acid into a cell (microorganism), and can be performed by appropriately selecting transformation techniques known in the art depending on the host cell.
- the known transformation methods include electroporation, calcium phosphate (CaPO4) precipitation, calcium chloride (CaCl2) precipitation, microinjection, polyethylene glycol (PEG) precipitation (polyethylene glycol-mediated uptake), Examples may include the DEAE-dextran method, cationic liposome method, lipofection, and lithium acetate-DMSO method, but are not limited thereto.
- RNA-guided endonuclease system RNA-guided endonuclease system or CRISPR system.
- RNA-guided endonuclease e.g., Cas9 protein, etc.
- guide RNA e.g., single guide RNA (sgRNA), etc.
- a mixture containing the coding DNA thereof, or a vector containing the DNA e.g., a mixture of an RNA-guide endonuclease protein and a guide RNA, etc.
- a complex e.g., a ribonucleic acid fusion protein (RNP), a recombinant vector (e.g., , a vector containing an RNA-guide endonuclease encoding gene and a guide RNA encoding DNA, etc.), etc.
- RNP ribonucleic acid fusion protein
- recombinant vector e.g., a vector containing an RNA-guide endonuclease encoding gene and a guide RNA encoding DNA, etc.
- Another aspect provides a recombinant vector comprising the polynucleotide.
- the recombinant vector can be used as an expression vector for the polypeptide.
- the recombinant vector may be used to insert the polynucleotide into the host cell genome or replace the corresponding gene in the host cell genome.
- the term “vector” refers to a DNA preparation containing the base sequence of a polynucleotide encoding the target protein operably linked to a suitable control sequence to enable expression of the target protein in a suitable host.
- the regulatory sequences may include a promoter capable of initiating transcription, an optional operator sequence to regulate transcription, a sequence encoding a suitable mRNA ribosome binding site, and/or sequences that regulate the termination of transcription and/or translation. there is.
- the vector can be transformed into a suitable host cell and then expressed independently of the host cell's genome or integrated into the host cell's genome.
- the vector that can be used herein is not particularly limited as long as it can replicate within the host cell, and can be selected from all commonly used vectors.
- 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 the phage vector or cosmid vector
- pBR series and pUC can be used as the plasmid vector.
- type, pBluescriptII type, pGEM type, pTZ type, pCL type and pET type can be used.
- examples include pDZ, pACYC177, pACYC184, pCL, pECCG117, pUC19, pBR322, pMW118, and pCC1BAC vectors, but are not limited thereto.
- Vectors that can be used herein may be known expression vectors and/or vectors for inserting polynucleotides into the host cell chromosome. Insertion of the polynucleotide into the host cell chromosome may be accomplished by any method known in the art, for example, homologous recombination or CRISPR system, but is not limited thereto.
- the vector may additionally include a selection marker to confirm insertion into the chromosome.
- the selection marker is used to select cells transformed with the vector, that is, to confirm whether or not the polynucleotide is inserted, and displays selectable phenotypes such as drug resistance, auxotrophy, resistance to cytotoxic agents, or expression of surface proteins. Can be selected and used from among genes that provide . 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.
- Another aspect includes one or more (one, two, or all three) selected from the group consisting of the variant protein, a polynucleotide encoding the variant protein, and a recombinant vector containing the polynucleotide.
- the microorganism may have L-histidine excretion activity and/or L-histidine production ability.
- the microorganism includes at least one species selected from the group consisting of the variant protein having L-histidine excretion activity and/or L-histidine production ability, a polynucleotide encoding the variant protein, and a recombinant vector containing the polynucleotide. It may be enhanced (or increased, improved) compared to microorganisms that do not.
- the variant protein may be foreign.
- “foreign” may mean something that is not inherently present in a microorganism, but is derived from a species different from the microorganism.
- microorganisms with enhanced L-histidine excretion activity and/or L-histidine production ability are engineered (mutated) to express the variant protein described above, thereby having L-histidine excretion activity and/or L-histidine production ability.
- microorganism encompasses single-celled bacteria and may be used interchangeably with “cell.”
- 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 enhanced or inactivated activity of intrinsic genes. It is a microorganism whose specific mechanism is weakened or strengthened, and may be a microorganism that includes genetic modification for the production of a desired polypeptide, protein, or product (e.g., L-histidine).
- the microorganism of the present application may be a microorganism (e.g., a recombinant microorganism) that has been genetically modified through a vector to enhance the activity of the L-histidine release protein or the polynucleotide encoding it, but is not limited thereto.
- the vector is the same as described above.
- microorganism in order to distinguish a microorganism before being mutated to express the variant protein from the mutated microorganism, it may be expressed as a “parent microorganism or parent strain” or “host cell.”
- That the microorganism (or strain, recombinant cell) has L-histidine excretion activity and/or L-histidine production ability, or that L-histidine excretion activity and/or L-histidine production ability is enhanced, means that the L-histidine excretion activity and/or L-histidine production ability are enhanced.
- a recombinant may mean that L-histidine excretion activity and/or L-histidine production ability is improved compared to the previous cell, parent strain, and/or wild-type strain.
- the microorganism of the present application is a microorganism containing at least one of the variant protein of the present application, a polynucleotide encoding the variant protein of the present application, and a vector containing the polynucleotide of the present application; Microorganisms modified to express the variant protein of the present application or the polynucleotide of the present application; Microorganisms (e.g., recombinant strains) expressing the variant protein of the present application, or the polynucleotide of the present application; Or it may be a microorganism (e.g., a recombinant strain) having the activity of the variant protein of the present application, but is not limited thereto.
- the microorganism may be one or more species selected from the group consisting of the genus Corynebacterium microorganisms, Escherichia microorganisms, etc.
- the microorganisms in the Corynebacterium genus include Corynebacterium glutamicum , Corynebacterium ammoniagenes , Brevibacterium lactofermentum , and Brevibacterium flavum. ( Brevibacterium flavum ), Corynebacterium thermoaminogenes ( Corynebacterium thermoaminogenes ), Corynebacterium efficiens ( Corynebacterium efficiens ), etc., but are not necessarily limited thereto. More specifically, the microorganism of the Corynebacterium genus may be Corynebacterium glutamicum .
- the Escherichia genus strain may be Escherichia coli .
- the microorganism may include one or more (one, two, or all three) selected from the group consisting of a variant protein, a polynucleotide encoding the variant protein, and a recombinant vector containing the polynucleotide.
- the mutation to express the variant protein is performed by introducing a polynucleotide encoding the variant protein described above, or a recombinant vector containing the same, or by artificial mutation (e.g., Error-prone PCR, etc. ) may be performed by, etc.
- the polynucleotide encoding the mutant protein introduced into the parent strain may replace or be included in addition to the gene encoding the AzlC family ABC transporter permease within the parent strain.
- the L-histidine excretion activity and/or L-histidine production ability may be further enhanced.
- the microorganism with enhanced L-histidine excretion activity and/or L-histidine production ability has an L-histidine production ability of about 10% compared to the parent strain before mutation, an unmodified microorganism, and a microorganism containing a wild-type L-histidine excretion protein. It may be an increase of 10% or more, 15% or more, 20% or more, 30% or more, 40% or more, 50% or more, 60% or more, 70% or more, or 80% or more, but is not limited thereto.
- the microorganism with enhanced L-histidine excretion activity and/or L-histidine production ability has an L-histidine production ability of about 10% compared to the parent strain before mutation, an unmodified microorganism, and a microorganism containing a wild-type L-histidine excretion protein. It may be, but is limited to, an increase of 1 g/L or more, 1.5 g/L or more, 2 g/L or more, 2.5 g/L or more, 3 g/L or more, 3.5 g/L or more, or 4 g/L or more. That is not the case.
- compositions for producing L-histidine comprising the variant protein, the polynucleotide, the recombinant vector, or the microorganism.
- Another aspect provides use of the variant protein, the polynucleotide, the recombinant vector, or the microorganism for L-histidine production.
- Another aspect provides use of the variant protein, the polynucleotide, the recombinant vector, or the microorganism for producing a composition for producing L-histidine.
- Another aspect provides a method for producing (manufacturing) L-histidine, comprising culturing the microorganism in a medium.
- the production method may further include recovering L-histidine from the cultured microorganism, medium, or both after the culturing step.
- Another aspect is a method for increasing the L-histidine excretion activity and/or L-histidine production ability of the microorganism, comprising the step of enhancing the L-histidine excretion activity and/or L-histidine production ability of the microorganism, or A method for imparting L-histidine excretion activity and/or L-histidine production ability to microorganisms is provided.
- the step of introducing the mutation includes introducing (transforming) a polynucleotide encoding a variant protein or a recombinant vector containing the polynucleotide into a microorganism, or artificially generating a mutation (e.g., Error- prone PCR, etc.).
- Another example provides a method for producing L-histidine, comprising culturing the microorganism with enhanced L-histidine excretion activity and/or L-histidine production ability in a medium.
- the method may further include recovering L-histidine from the cultured microorganism, medium, or both after the culturing step.
- the step of cultivating the microorganism is not particularly limited thereto, but may be performed by known batch culture methods, continuous culture methods, fed-batch culture methods, etc.
- the culture conditions are not particularly limited, but are adjusted to an appropriate pH (e.g., pH 5 to 9, specifically, using a basic compound (e.g., sodium hydroxide, potassium hydroxide, or ammonia) or an acidic compound (e.g., phosphoric acid or sulfuric acid). can adjust pH 6 to 8) and maintain aerobic conditions by introducing oxygen or an oxygen-containing gas mixture into the culture.
- the culture temperature can be maintained at 20 to 45°C, or 25 to 40°C, and culture can be performed for about 10 to 160 hours, but is not limited thereto.
- L-histidine produced by the above culture may be secreted into the medium or remain within the cell.
- the medium usable for the culture includes sugars and carbohydrates (e.g. glucose, sucrose, lactose, fructose, maltose, molase, starch and cellulose), oils and fats (e.g. soybean oil, sunflower seed oil, etc.) as carbon sources.
- sugars and carbohydrates e.g. glucose, sucrose, lactose, fructose, maltose, molase, starch and cellulose
- oils and fats e.g. soybean oil, sunflower seed oil, etc.
- Peanut oil and coconut oil fatty acids (e.g. palmitic acid, stearic acid and linoleic acid), alcohols (e.g. glycerol and ethanol), organic acids (e.g. acetic acid), etc. are used individually or Alternatively, a mixture of two or more types may be used, but is not limited thereto.
- Nitrogen sources include nitrogen-containing organic compounds (e.g.
- peptone, yeast extract, broth, malt extract, corn steep liquor, soybean meal, and urea) and inorganic compounds e.g. ammonium sulfate, ammonium chloride, ammonium phosphate, ammonium carbonate, and nitric acid).
- Ammonium etc.
- a phosphorus source one or more types selected from the group consisting of potassium dihydrogen phosphate, dipotassium hydrogen phosphate, and corresponding sodium-containing salts may be used individually or two or more types may be used in combination, but is not limited thereto.
- the medium may contain essential growth-promoting substances such as other metal salts (e.g., magnesium sulfate or iron sulfate), amino acids, and/or vitamins.
- the step of recovering L-histidine may involve collecting the desired amino acid from a medium, culture medium, or microorganism using a suitable method known in the art depending on the culture method.
- the recovering step may be performed by one or more methods selected from centrifugation, filtration, anion exchange chromatography, crystallization, HPLC, etc.
- the method for recovering L-histidine may additionally include a purification step before, at the same time, or thereafter.
- the present application discovers a histidine-excreting protein or a variant thereof with the ability to excrete L-histidine and expresses it in a microorganism with the ability to produce L-histidine, thereby dramatically improving L-histidine production.
- excretion proteins basic amino acids: L-lysine (L-lys), aromatic amino acids: tryptophan (Trp), side amino acids: isoleucine (Ile)
- LysE Basic amino acids: L-lysine (L-lys)
- Trp aromatic amino acids
- Ile side amino acids: isoleucine (Ile)
- LysE The amino acid sequences of LysE (Arch Microbiol 180: 155-160), Wex (Korea Patent No. 10-1968317), and BrnFE (Arch Microbiol 180: 155-160)) were used as query sequences, and based on NCBI and Kegg database.
- PSI-BLAST search candidate genes predicted to be membrane proteins likely to excrete L-histidine and microorganisms possessing them were selected.
- the biosafety level is based on the microbial pathogenicity index (level 1 to 4) defined by the U.S. Centers for Disease Control and Prevention (the lower the level, the safer)
- Example 2 Construction of a foreign L-histidine excretion gene candidate introduction vector and a recombinant Corynebacterium strain introducing the same
- Example 2-1 Construction of vector pDZ ⁇ N2131 for target gene insertion
- NCgl2131 deletion and target gene insertion vectors were constructed.
- PCR was performed using the chromosome of Corynebacterium glutamicum strain ATCC13032 as a template and primer pairs of SEQ ID NO: 18, SEQ ID NO: 19, SEQ ID NO: 20, and SEQ ID NO: 21, respectively.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And after repeating the polymerization reaction at 72°C for 2 minutes 28 times, the polymerization reaction was performed at 72°C for 5 minutes, resulting in 531 bp of del-N2131L (SEQ ID NO: 22) and 555 bp of del-N2131R (SEQ ID NO: 23) DNA, respectively. A fragment was obtained.
- the obtained DNA product was purified using QIAGEN's PCR Purification kit and cloned using pDZ vector (Korean Patent No. 10-0924065) and TaKaRa's Infusion Cloning Kit, resulting in NCgl2131 gene deletion and target gene insertion.
- the vector pDZ ⁇ N2131 was created.
- haq SEQ ID NO: 2 encoding a protein derived from Herbaspirillum aquaticum (hereinafter, Haq , SEQ ID NO: 1) was obtained from the National Institutes of Health GenBank (NIH GenBank).
- NIH GenBank National Institutes of Health GenBank
- PCR was performed using the primer pair of SEQ ID NO: 24 and SEQ ID NO: 25 using the chromosomal DNA of the Herbaspirillum aquaticum strain (KCTC42001) as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 2 minutes, and then the polymerization reaction was performed at 72°C for 5 minutes to obtain a 977bp haq fragment including 945bp haq (SEQ ID NO: 2).
- PCR was performed using the primer pair of SEQ ID NO: 26 and SEQ ID NO: 27 using the chromosome of ATCC13032 as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times for 1 minute at 72°C, and then the polymerization reaction was performed at 72°C for 5 minutes to obtain a 441bp PgapA fragment including 409bp of PgapA (SEQ ID NO: 17).
- the obtained haq fragment, PgapA fragment, and pDZ ⁇ N2131 vector cut with ScaI restriction enzyme were subjected to Gibson assembly (DG Gibson et al., NATURE METHODS, VOL.6 NO.5, MAY 2009, NEBuilder HiFi DNA Assembly Master Mix) method.
- Gibson assembly DG Gibson et al., NATURE METHODS, VOL.6 NO.5, MAY 2009, NEBuilder HiFi DNA Assembly Master Mix
- Base sequence information of the gene (hereinafter, cpi, SEQ ID NO: 4) encoding a protein derived from Cupriavidus pinatubonensis (hereinafter, Cpi , SEQ ID NO: 3) was obtained from NIH GenBank.
- Cpi protein derived from Cupriavidus pinatubonensis
- PCR was performed using the primer pair of SEQ ID NO: 28 and SEQ ID NO: 29 using the chromosomal DNA of the Cupriavidus pinatubonensis strain (KCTC22125) as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 2 minutes, and then the polymerization reaction was performed at 72°C for 5 minutes. As a result, a 977bp cpi fragment including 945bp of cpi (SEQ ID NO: 4) was obtained.
- PCR was performed using the primer pair of SEQ ID NO: 26 and SEQ ID NO: 30 using the chromosome of ATCC13032 as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times for 1 minute at 72°C, and then the polymerization reaction was performed at 72°C for 5 minutes to obtain a 441bp PgapA fragment including 409bp of PgapA (SEQ ID NO: 17).
- the obtained cpi fragment, PgapA fragment, and pDZ ⁇ N2131 vector cut with ScaI restriction enzyme were cloned using the Gibson assembly method to obtain a recombinant plasmid, which was named pDZ ⁇ N2131-PgapA-Cpi.
- Base sequence information of the gene (hereinafter, kcr, SEQ ID NO: 6) encoding a protein derived from Kluyvera cryocrescens (hereinafter, Kcr , SEQ ID NO: 5) was obtained from NIH GenBank.
- Kcr a protein derived from Kluyvera cryocrescens
- PCR was performed using the primer pair of SEQ ID NO: 31 and SEQ ID NO: 32 using the chromosomal DNA of the Kluyvera cryocrescens strain (KCTC2580) as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times for 2 minutes at 72°C, and then the polymerization reaction was performed at 72°C for 5 minutes to obtain a 914bp kcr fragment including 882bp of kcr (SEQ ID NO: 6). To obtain a PgapA fragment that can be linked to kcr , PCR was performed using the primer pair of SEQ ID NO: 26 and SEQ ID NO: 33 using the chromosome of ATCC13032 as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 1 minute, and then the polymerization reaction was performed at 72°C for 5 minutes. As a result, a 441bp PgapA fragment including 409bp of PgapA (SEQ ID NO: 17) was obtained.
- the obtained kcr fragment, PgapA fragment, and pDZ ⁇ N2131 vector cut with ScaI restriction enzyme were cloned using the Gibson assembly method to obtain a recombinant plasmid, which was named pDZ ⁇ N2131-PgapA-Kcr.
- Base sequence information of the gene (hereinafter, cst, SEQ ID NO: 8) encoding a protein derived from Corynebacterium stationis (hereinafter, Cst , SEQ ID NO: 7) was obtained from the National Institutes of Health GenBank (NIH GenBank).
- NIH GenBank National Institutes of Health GenBank
- PCR was performed using the primer pair of SEQ ID NO: 34 and SEQ ID NO: 35 using the chromosomal DNA of Corynebacterium stationis strain (ATCC6872) as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 2 minutes, and then the polymerization reaction was performed at 72°C for 5 minutes to obtain a 749bp cst fragment including 717bp of cst (SEQ ID NO: 8). To obtain a PgapA fragment that can be linked to cst , PCR was performed using the primer pair of SEQ ID NO: 26 and SEQ ID NO: 36 using the chromosome of ATCC13032 as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 1 minute, and then the polymerization reaction was performed at 72°C for 5 minutes. As a result, a 441bp PgapA fragment including 409bp of PgapA (SEQ ID NO: 17) was obtained.
- the obtained cst fragment, PgapA fragment, and pDZ ⁇ N2131 vector cut with ScaI restriction enzyme were cloned using the Gibson assembly method to obtain a recombinant plasmid, which was named pDZ ⁇ N2131-PgapA-Cst.
- Base sequence information of the operon (hereinafter, lsa, SEQ ID NO: 11) encoding a protein derived from Leucobacter salsicius (hereinafter, LsaFE , SEQ ID NO: 9, 10) was obtained from NIH GenBank.
- LsaFE protein derived from Leucobacter salsicius
- PCR was performed using the primer pair of SEQ ID NO: 37 and SEQ ID NO: 38 using the chromosomal DNA of Leucobacter salsicius strain (KCTC19904) as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 2 minutes, and then polymerization was performed at 72°C for 5 minutes to obtain a 1080bp lsa fragment including 1048bp lsa (SEQ ID NO: 11).
- SEQ ID NO: 11 1080bp lsa fragment including 1048bp lsa
- PCR was performed using the primer pair of SEQ ID NO: 26 and SEQ ID NO: 39 using the chromosome of ATCC13032 as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times for 1 minute at 72°C, and then the polymerization reaction was performed at 72°C for 5 minutes to obtain a 441bp PgapA fragment including 409bp of PgapA (SEQ ID NO: 17).
- the obtained lsa fragment, PgapA fragment, and pDZ ⁇ N2131 vector cut with ScaI restriction enzyme were cloned using the Gibson assembly method to obtain a recombinant plasmid, which was named pDZ ⁇ N2131-PgapA-Lsa.
- Base sequence information of the operon (hereinafter, dva , SEQ ID NO: 16) encoding a protein derived from Dermabacter vaginalis (hereinafter, DvaFE, SEQ ID NO: 12, 13) was obtained from NIH GenBank.
- DvaFE protein derived from Dermabacter vaginalis
- PCR was performed using the primer pair of SEQ ID NO: 40 and SEQ ID NO: 41 using the chromosomal DNA of Dermabacter vaginalis strain (KCTC39585) as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And after repeating the polymerization reaction at 72°C for 2 minutes 28 times, the polymerization reaction was performed at 72°C for 5 minutes to obtain a 1113 bp dva fragment including 1081 bp dva (SEQ ID NO: 16). To obtain a PgapA fragment that can be linked to dva , PCR was performed using the primer pair of SEQ ID NO: 26 and SEQ ID NO: 42 using the chromosome of ATCC13032 as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times for 1 minute at 72°C, and then the polymerization reaction was performed at 72°C for 5 minutes to obtain a 441bp PgapA fragment including 409bp of PgapA (SEQ ID NO: 17).
- the obtained dva fragment, PgapA fragment, and pDZ ⁇ N2131 vector cut with ScaI restriction enzyme were cloned using the Gibson assembly method to obtain a recombinant plasmid, which was named pDZ ⁇ N2131-PgapA-Dva.
- the constructed NCgl2131 deletion vector (pDZ ⁇ N2131) and six foreign L-histidine excretion gene candidate introduction vectors (pDZ ⁇ N2131-PgapA-Haq, pDZ ⁇ N2131-PgapA) were used.
- ATCC13032 ⁇ N2131 N2131 gene deletion
- ATCC13032 ⁇ N2131::Haq N2131 gene replaced with haq
- ATCC13032 ⁇ N2131::Cpi N2131 gene replaced with cpi
- ATCC13032 ⁇ N2131::Kcr N2131 gene replaced with kcr
- ATCC13032 ⁇ N2131 They were named ::Cst (N2131 gene replaced with cst ), ATCC13032 ⁇ N2131::Lsa (N2131 gene replaced with lsa ), and ATCC13032 ⁇ N2131::Dva (N2131 gene replaced with dva ).
- Example 2 Seven recombinant Corynebacterium glutamicum strains produced in Example 2 (ATCC13032 ⁇ N2131, ATCC13032 ⁇ N2131::Haq, ATCC13032 ⁇ N2131::Cpi, ATCC13032 ⁇ N2131::Kcr, ATCC13032 ⁇ N2131::Cst, ATCC13032 ⁇ N2 131::Lsa, and ATCC13032 ⁇ N2131: :Dva), a minimum inhibitory concentration (MIC) experiment using L-histidine was performed to confirm whether the L-histidine excretion activity was maintained. Seven types of strains were cultured in minimal liquid medium at 30 °C for 24 hours, then diluted to 1 The minimum solid medium composition used is as follows:
- + indicates the relative growth degree of the strains, each indicating the following: +: single colony is not formed, but heavy (a form that cannot grow as a single colony but grows in clusters) is formed;++: heavy formation and less than 5 single colonies are formed;
- the Dermabacter vaginalis -derived protein Dva was selected as a protein that confers resistance to L-histidine above the minimum inhibitory concentration to Corynebacterium strains and has a specific L-histidine excretion ability.
- Example 4 Based on Corynebacterium-derived L-histidine producing strain (KCCM 80179) Dermabacter vaginalis Derived gene ( dva) Production of introduced strain and evaluation of L-histidine production ability
- the Dermabacter vaginalis -derived gene dva was introduced into the L-histidine producing strain KCCM 80179 (Korean Patent Publication No. 10-2019-0065984).
- the vectors pDZ ⁇ N2131 and pDZ ⁇ N2131-PgapA-Dva constructed in Example 2 were each transformed into the KCCM80179 strain by electroporation, and through a second crossover process, the NCgl2131 gene on the chromosome was deleted or the L-histidine export gene candidate was transformed.
- Two strains with a substitution of ( dva ) were created, and they were named KCCM 80179 ⁇ N2131 (NCgl2131 gene deleted) and KCCM 80179 ⁇ N2131-PgapA-Dva (NCgl2131 gene substituted with dva ), respectively.
- KCCM 80179 ⁇ N2131 and KCCM 80179 ⁇ N2131-PgapA-Dva strains produced above they were cultured in the following manner: KCCM 80179 ⁇ N2131 and KCCM 80179 ⁇ N2131-PgapA-Dva strains were cultured in activation medium for 16 hours. Afterwards, each strain was inoculated into a 250 ml corner-baffle flask containing 25 ml of seed medium, and cultured at 30° C. for 20 hours with shaking at 200 rpm.
- L-histidine production (histidine content in the medium) was measured by HPLC, and the results are shown in Table 3 below:
- the NCgl2131 deletion strain has an L-histidine production ability equivalent to that of the parent strain, KCCM 80179 strain, while the KCCM 80179 ⁇ N2131-PgapA-Dva strain into which the Dermabacter vaginalis- derived gene was introduced has the NCgl2131 deletion strain and It was confirmed that the L-histidine production ability was increased by more than 23% and 21%, respectively, compared to the parent strain, KCCM 80179 strain.
- the introduction of a gene derived from Dermabacter vaginalis not only increased resistance to L-histidine concentrations above the minimum inhibitory concentration, but also significantly increased the ability to produce L-histidine.
- Example 5 Dermabacter vaginalis Securing additional derived L-histidine emitter-like protein
- a vector was constructed to introduce the two additional L-histidine excretion gene candidates selected in Example 5 into a Corynebacterium genus strain.
- the NCgl2131 gene was used as a deletion site and PgapA was used as a promoter.
- HmaFE Helcobacillus massiliensis
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 2 minutes, and then the polymerization reaction was performed at 72°C for 5 minutes. As a result, a 1113bp hma fragment including 1081bp hma (SEQ ID NO: 47) was obtained. To obtain a PgapA fragment that can be linked to hma, PCR was performed using the primer pair of SEQ ID NO: 26 and SEQ ID NO: 50 using the chromosome of ATCC13032 as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 1 minute, and then the polymerization reaction was performed at 72°C for 5 minutes. As a result, a 441bp PgapA fragment including 409bp of PgapA (SEQ ID NO: 17) was obtained.
- the obtained hma fragment, PgapA fragment, and pDZ ⁇ N2131 vector cut with ScaI restriction enzyme were cloned using the Gibson assembly method to obtain a recombinant plasmid, which was named pDZ ⁇ N2131-PgapA-Hma.
- Example 7 Based on L-histidine producing strain (KCCM 80179) Helcobacillus massiliensis Introduction of derived genes ( hma ) Strain production and evaluation of L-histidine production ability
- the vector pDZ ⁇ N2131-PgapA-Hma prepared in Example 6 was transformed into the KCCM80179 strain by electroporation, and through a second crossover process, a strain in which the NCgl2131 gene on the chromosome was replaced with a candidate L-histidine export gene was created. It was named KCCM 80179 ⁇ N2131-PgapA-Hma (NCgl2131 gene replaced with hma).
- the strain was cultured by the method performed in Example 4 and L-histidine production was measured.
- culture and L-histidine production were measured in the same manner for the KCCM 80179 ⁇ N2131 strain and the KCCM 80179 ⁇ N2131-PgapA-Dva strain produced in Example 4. The obtained results are shown in Table 6.
- Example 8 Production of Hma mutation library using artificial mutagenesis method
- a mutant protein expression vector library for primary crossover was created.
- hma operons in which base substitution mutations were randomly introduced were obtained by error-prone PCR using the primer pair of SEQ ID NO: 48 and SEQ ID NO: 49 using the constructed pDZ ⁇ N2131-PgapA-Hma as a template.
- Error-prone PCR was performed using the GenemorphII Random Mutagenesis Kit (Stratagene) under conditions where 0 to 3.5 mutations per 1 kb were introduced into the amplified gene fragment.
- PCR was performed using the primer pair of SEQ ID NO: 26 and SEQ ID NO: 50 using the chromosome of ATCC13032 as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 1 minute, and then the polymerization reaction was performed at 72°C for 5 minutes to obtain a PgapA fragment.
- the obtained mutant hma operons, PgapA fragment, and pDZ ⁇ N2131 vector cut with ScaI restriction enzyme were subjected to Gibson assembly (DG Gibson et al., NATURE METHODS, VOL.6 NO.5, MAY 2009, NEBuilder HiFi DNA Assembly Master Mix).
- Example 9 Introduction of Hma artificial mutation library and selection of strains with increased L-histidine production ability
- the constructed pDZ ⁇ N2131-PgapA-Hma(mt) library was transformed by homologous chromosomal recombination and plated on a composite plate medium containing kanamycin (25 mg/L) to form about 7,000 colonies. was secured, and each colony was named ATCC13032 ⁇ N2131-PgapA-Hma(mt)-1 to ATCC13032 ⁇ N2131-PgapA-Hma(mt)-7000.
- Glucose 10g Peptone 10g, Beef extract 5g, Yeast extract 5g, Brain Heart Infusion 18.5g, NaCl 2.5g, Urea 2g, Sorbitiol 91g, Agar 20g (based on 1 liter of distilled water)
- the minimum inhibitory concentration (MIC) test for L-histidine performed in Example 3 was performed on the obtained 7000 colonies. For efficient screening, it was performed based on liquid minimal medium containing 3g of L-histidine. The colony was immediately inoculated into 300ul of liquid minimal medium and cultured in a 96-deep well plate at 32 ⁇ C and 1000rpm for about 18 hours, and then the OD600 value was measured to select colonies with excellent growth.
- As a control the ATCC13032 ⁇ N2131 strain and ATCC13032 ⁇ N2131::Hma strain prepared above were used. 251 colonies were selected through the first experiment, and 36 colonies were selected through a repeat experiment.
- the media components used are as follows.
- + indicates the relative growth degree of the strains, each indicating the following: +: single colony is not formed, but heavy (a form that cannot grow as a single colony but grows in clusters) is formed;++: heavy formation and less than 5 single colonies are formed;
- NCgl2131 deletion strain (ATCC13032 ⁇ N2131) did not grow smoothly in minimal medium containing 1 g/L of L-histidine, but the ATCC13032 ⁇ N2131::Hma strain into which the gene derived from Helcobacillus massiliensis was introduced grew smoothly.
- Example 10 Production of selection library introduction strain based on Corynebacterium-derived L-histidine producing strain (KCCM 80179) and evaluation of L-histidine production ability
- a vector was constructed to introduce the variant hma contained in the six colonies selected in Example 9 into an L-histidine producing strain.
- PCR conditions were denaturation 96°C, 30 seconds; Annealing 53°C, 30 seconds; And the polymerization reaction was repeated 30 times at 72°C for 2 minutes.
- PCR was performed using the primer pair of SEQ ID NO: 26 and SEQ ID NO: 50 using the chromosome of ATCC13032 as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 1 minute, and then the polymerization reaction was performed at 72°C for 5 minutes to obtain a PgapA fragment.
- the six mutant hma fragments obtained above, the PgapA fragment, and the pDZ ⁇ N2131 vector cut with ScaI restriction enzyme were cloned using the Gibson assembly method to obtain a recombinant plasmid, which was converted into pDZ ⁇ N2131-PgapA-Hma(mt) according to the derived library colony.
- the constructed vector was transformed into the KCCM 80179 strain by electroporation, and through a second crossing process, 6 strains into which 6 mutant hma strains were introduced were produced, respectively: KCCM80179 ⁇ N2131-PgapA-Hma(mt)-1216, KCCM80179 ⁇ N2131-PgapA-Hma(mt)-2315, KCCM80179 ⁇ N2131-PgapA-Hma(mt)-3411, KCCM80179 ⁇ N2131-PgapA-Hma(mt)-4426, KCCM80179 ⁇ N2131-PgapA-Hma(mt)-5 714, KCCM80179 ⁇ N2131-PgapA-Hma( It was named mt)-6718.
- Example 7 In order to confirm the L-histidine production ability of the six strains produced above, the KCCM 80179 ⁇ N2131-PgapA-Hma strain produced in Example 7 was used as a control and measured in the same manner as in Example 4, and the results are shown in Table Shown in 8:
- KCCM 80179 L-histidine production of 6 mutant hma-introduced strains derived from KCCM 80179 Cell OD 600 used Glucose (g/L) histidine Yield (g/L) KCCM 80179 51.0 100 13.9 KCCM 80179 ⁇ N2131 51.1 100 14.0 KCCM 80179 ⁇ N2131-PgapA-Hma 43.5 100 16.5 KCCM 80179 ⁇ N2131-PgapA-Hma(mt)-1216 50.1 100 15.1 KCCM 80179 ⁇ N2131-PgapA-Hma(mt)-2315 45.8 100 16.2 KCCM80179 ⁇ N2131-PgapA-Hma(mt)-3411 40.1 100 16.4 KCCM80179 ⁇ N2131-PgapA-Hma(mt)-4426 44.0 100 16.2 KCCM80179 ⁇ N2131-PgapA-Hma(mt)-
- the NCgl2131 deletion strain (KCCM 80179 ⁇ N2131) has an L-histidine production ability equivalent to that of the parent strain, KCCM 80179 strain, while the ATCC13032 ⁇ N2131::Hma strain into which the gene derived from Helcobacillus massiliensis was introduced has NCgl2131 deletion.
- the L-histidine production ability increased compared to the strain and the parent strain, KCCM 80179 strain.
- the six strains into which each of the six mutant hma strains were introduced were equivalent to or equivalent to the KCCM 80179 ⁇ N2131-PgapA-Hma strain compared to the NCgl2131 deletion strain and the parent strain, KCCM 80179 strain.
- the L-histidine production ability increased to a higher level, and in particular, the L-histidine production ability of the KCCM80179 ⁇ N2131-PgapA-Hma(mt)-5714 and KCCM80179 ⁇ N2131-PgapA-Hma(mt)-6718 strains was higher than that of KCCM 80179 ⁇ N2131-PgapA into which wild type hma was introduced. It was confirmed that there was an increase of 3.6% and 12.1%, respectively, compared to -Hma.
- the base sequence of the Hma variant was analyzed.
- PCR was performed using the gDNA of the KCCM80179 ⁇ N2131-PgapA-Hma(mt)-6718 strain as a template and a primer pair of SEQ ID NO: 18 and SEQ ID NO: 21.
- the base sequence of the variant hma operon and the protein sequence of HmaF or HmaE were confirmed and compared with the amino acid sequence of SEQ ID NO. 43 or SEQ ID NO. 44, and the mutation information of the amino acid sequence of the variant HmaFE confirmed through this was It is shown in Table 9.
- the mutant HmaFE introduced into the KCCM80179 ⁇ N2131-PgapA-Hma(mt)-6718 strain has I72L (isoleucine (Ile, I) at position 72 of SEQ ID NO. 43 is mutated to leucine (Leu, L)) and I124V in HmaF. (Isoleucine (Ile, I) at position 124 of SEQ ID NO: 43 is mutated to valine (Val, V)) It was confirmed that this was a mutant excretor with increased L-histidine excretion ability due to the introduction of the mutation.
- Example 12 Based on L-histidine producing strain (CA14-737) Helcobacillus massiliensis Production of strain introduced with derived mutant gene and evaluation of L-histidine production ability
- the HisG polypeptide mutation was introduced to eliminate the feedback limitation caused by L-histidine from wild-type Corynebacterium glutamicum ATCC13032, and the L-histidine biosynthesis gene. was introduced into the enhanced L-histidine producing strain CA14-737 (KCCM 12411P, Republic of Korea Patent Publication No. 10-2019-0065984).
- the three vectors (pDZ ⁇ N2131, pDZ ⁇ N2131-PgapA-Hma, pDZ ⁇ N2131-PgapA-Hma(mt)-6718) prepared in Examples 2 and 10 were each transformed into the CA14-737 strain by electroporation, and the second Through a crossover process, three strains were created in which the NCgl2131 gene on the chromosome was deleted or replaced with an L-histidine export gene, which were CA14-737 ⁇ N2131, CA14-737 ⁇ N2131-PgapA-Hma, and CA14-737 ⁇ N2131-PgapA-Hma (mt), respectively. )-6718.
- the CA14-737 ⁇ N2131-PgapA-Hma strain into which the gene derived from Helcobacillus massiliensis was introduced increased L-histidine production by 54% compared to the NCgl2131 deletion strain (CA14-737 ⁇ N2131) and the parent strain CA14-737 strain;
- the CA14-737 ⁇ N2131-PgapA-Hma(mt)-6718 strain into which the mutant hma was introduced increased by 78%.
- primer pairs of SEQ ID NO: 52 and SEQ ID NO: 53 were used using the chromosomal DNA of ATCC13032 ⁇ N2131-PgapA-Hma and ATCC13032 ⁇ N2131-PgapA-Hma(mt)-6718 as templates.
- Wild-type and mutant hma DNA fragments were obtained by performing PCR, respectively. PCR conditions were denaturation 96°C, 30 seconds; Annealing 53°C, 30 seconds; And the polymerization reaction was repeated 30 times at 72°C for 2 minutes.
- PCR was performed using the primer pair of SEQ ID NO: 54 and SEQ ID NO: 55 using the chromosome of MG1655 as a template.
- PfuUltraTM high-reliability DNA polymerase (Stratagene) was used as the polymerase for the PCR reaction, and the PCR conditions were as follows: denaturation 95°C, 30 seconds; Annealing 55°C, 30 seconds; And the polymerization reaction was repeated 28 times at 72°C for 1 minute, and then the polymerization reaction was performed at 72°C for 5 minutes to obtain a PyccA fragment.
- Example 14 Based on L-histidine producing strain derived from E. coli Helcobacillus massiliensis Production of strains introduced with Hma wild-type genes and variants and evaluation of L-histidine production ability
- the two vectors constructed in Example 13 and the pBAC vector were used with previously reported genotypes (purR deletion, hisL deletion) , hisGr; CA14-9003e strain (MG1655+ hisGr hisL'_ ⁇ ) with the directed modification of Escherichia coli MG1655 to obtain histidine-producing mutants; Applied Biochemistry and Microbiology, 2013, Vol. 49, No. 2, pp.
- CA14-9003e/pBAC, CA14-9003e/pBAC-PyccA-Hma, and CA14-9003e/pBAC-PyccA-Hma(mt)-6718 strains produced above use the following method. Cultured. After culturing the strains in LB solid medium (containing 25 ⁇ g/ml of chloramphenicol) for 16 hours, each strain was inoculated into a 250 ml corner-baffle flask containing 25 ml of LB liquid medium, and incubated at 37 ° C. for 20 hours, at 200 °C. The culture was shaken at rpm.
- Glucose 4% (w/v), yeast extract 0.2% (w/v), ammonium sulfate 1.6% (w/v), potassium dibasic phosphate trihydrate 0.06% (w/v), iron sulfate heptahydrate 0.0005% ( w/v), magnesium sulfate pentahydrate 0.0005% (w/v), calcium carbonate, pH 7.2,
- L-histidine production (histidine content in the medium) was measured by HPLC, and the results are shown in Table 11 below.
- the CA14-9003e/pBAC-PyccA-Hma(mt)-6718 strain into which the mutant Hma was introduced had an L-histidine production capacity of 30% compared to the CA14-9003e/pBAC-PyccA-Hma strain into which the wild type Hma was introduced. % increase was confirmed. Through the above results, it was confirmed that the ability to excrete L-histidine out of the cell was significantly increased even when the L-histidine exporter variant derived from Helcobacillus massiliensis was introduced into microorganisms other than Corynebacterium strains.
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Abstract
Description
| No. | 균 주 | Protein Ref Seq. | gDNA Ref Seq. | 생물 안전도 | 아미노산 서열 | 핵산 서열 | |
| Wex 기반 | 1 | Herbaspirillum aquaticum (KCTC42001) |
WP_088757482.1 | NZ_NJGV01000035.1 | 1 | 서열번호 1 | 서열번호 2 |
| 2 | Cupriavidus pinatubonensis (KCTC22125) |
WP_041680244.1 | CP000091.1 | 1 | 서열번호 3 | 서열번호 4 | |
| 3 | Kluyvera cryocrescens(KCTC2580) | WP_052283291.1 | NZ_LGHZ01000014.1 | 1 | 서열번호 5 | 서열번호 6 | |
| LysE 기반 | 4 | Corynebacterium stationis (ATCC6872) |
WP_066837457.1 | CP014279.1 | 1 | 서열번호 7 | 서열번호 8 |
| BrnFE 기반 | 5 | Leucobacter salsicius (KCTC19904) |
WP_026139602.1 | NZ_AOCN01000022.1 | 1 | 서열번호 9 | 서열번호 11 |
| WP_083879221.1 | 서열번호 10 | ||||||
| 6 | Dermabacter vaginalis (KCTC39585) |
WP_065248528.1 (DvaF) | NZ_CP012117.1 | 1 | 서열번호 12 | 서열번호 14 | |
| WP_065248527.1(DvaE) | 서열번호 13 | 서열번호 15 | |||||
| DvaFE | 서열번호 12 및 13 | 서열번호 16 (DvaFE 오페론) |
| 균주 | L-히스티딘 미포함 최소배지 | L-히스티딘 1 g/L 포함 최소배지 |
| ATCC13032ΔN2131 | ++++ | + |
| ATCC13032ΔN2131::Haq | ++++ | + |
| ATCC13032ΔN2131::Cpi | ++++ | + |
| ATCC13032ΔN2131::Kcr | ++++ | + |
| ATCC13032ΔN2131::Cst | ++++ | + |
| ATCC13032ΔN2131::Lsa | ++++ | + |
| ATCC13032ΔN2131::Dva | ++ | +++ |
| Cell OD600 |
사용한
포도당 (g/L) |
히스티딘
생산량 (g/L) |
|
| KCCM 80179 | 51.4 | 100 | 14.1 |
| KCCM 80179ΔN2131 | 51.6 | 100 | 13.9 |
| KCCM 80179ΔN2131-PgapA-Dva | 42.6 | 100 | 17.1 |
| No. | 균 주 | Protein Ref Seq. | gDNA Ref Seq. | 생물 안전도 | 단백질 서열 | 유전자 서열 |
| 7 | Helcobacillus massiliensis | WP_055090792.1 (HmaF) |
NZ_CYUG01000017.1 | 2 | 서열번호 43 | 서열번호 45 |
| WP_055090293.1 (HmaE) |
서열번호 44 | 서열번호 46 | ||||
| HmaFE | 서열번호 43 및 44 | 서열번호 47(HmaFE 오페론) |
| OD |
사용한
포도당 (g/L) |
히스티딘
생산량 (g/L) |
|
| KCCM 80179 | 50.3 | 100 | 14.0 |
| KCCM 80179ΔN2131 | 51.5 | 100 | 13.9 |
| KCCM 80179ΔN2131-PgapA-Dva | 40.8 | 100 | 17.3 |
| KCCM 80179ΔN2131-PgapA-Hma | 43.1 | 100 | 16.6 |
| 균주 | L-히스티딘 미포함 최소배지 | L-히스티딘 1 g/L 포함 최소배지 |
| ATCC13032ΔN2131 | ++++ | + |
| ATCC13032ΔN2131::Hma | ++++ | +++ |
| ATCC13032ΔN2131-PgapA-Hma(mt)-1216 | ++++ | ++++ |
| ATCC13032ΔN2131-PgapA-Hma(mt)-2305 | ++++ | ++++ |
| ATCC13032ΔN2131-PgapA-Hma(mt)-3411 | ++++ | ++++ |
| ATCC13032ΔN2131-PgapA-Hma(mt)-4426 | ++++ | ++++ |
| ATCC13032ΔN2131-PgapA-Hma(mt)-5714 | ++++ | ++++ |
| ATCC13032ΔN2131-PgapA-Hma(mt)-6718 | ++++ | ++++ |
| Cell OD600 |
사용한
포도당 (g/L) |
히스티딘
생산량 (g/L) |
|
| KCCM 80179 | 51.0 | 100 | 13.9 |
| KCCM 80179ΔN2131 | 51.1 | 100 | 14.0 |
| KCCM 80179ΔN2131-PgapA-Hma | 43.5 | 100 | 16.5 |
| KCCM 80179ΔN2131-PgapA-Hma(mt)-1216 | 50.1 | 100 | 15.1 |
| KCCM 80179ΔN2131-PgapA-Hma(mt)-2315 | 45.8 | 100 | 16.2 |
| KCCM80179ΔN2131-PgapA-Hma(mt)-3411 | 40.1 | 100 | 16.4 |
| KCCM80179ΔN2131-PgapA-Hma(mt)-4426 | 44.0 | 100 | 16.2 |
| KCCM80179ΔN2131-PgapA-Hma(mt)-5714 | 41.5 | 100 | 17.1 |
| KCCM80179ΔN2131-PgapA-Hma(mt)-6718 | 40.7 | 100 | 18.5 |
| 균주 | HmaF (서열번호 43) |
HmaE (서열번호 44) |
| KCCM80179ΔN2131-PgapA-Hma(mt)-6718 | I72L, I124V | 변이 X |
| OD |
사용한
포도당 (g/L) |
히스티딘
생산량 (g/L) |
|
| CA14-737 | 90.3 | 100 | 4.1 |
| CA14-737ΔN2131 | 90.5 | 100 | 4.0 |
| CA14-737ΔN2131-PgapA-Hma | 71.1 | 100 | 6.3 |
| CA14-737ΔN2131-PgapA-Hma(mt)-6718 | 61.5 | 100 | 7.3 |
| OD |
사용한
포도당 (g/L) |
히스티딘
생산량 (g/L) |
|
| CA14-9003e/pBAC | 24.5 | 40 | 2.9 |
| CA14-9003e/pBAC-PyccA-Hma | 17.1 | 40 | 3.7 |
| CA14-9003e/pBAC-PyccA-Hma(mt)-6718 | 14.5 | 40 | 4.8 |
Claims (11)
- (1) 서열번호 43의 아미노산 서열의 72번째 아미노산 잔기에 상응하는 아미노산이 다른 아미노산으로 치환되거나,(2) 서열번호 43의 아미노산 서열의 124번째 잔기에 상응하는 아미노산이 다른 아미노산으로 치환되거나, 또는(3) 상기 (1) 및 (2)가 모두 치환된,변이형 L-히스티딘 배출 단백질.
- 제1항에 있어서,(1) 서열번호 43의 아미노산 서열의 72번째 아미노산 잔기에 상응하는 아미노산이 류신, 글리신, 프롤린, 알라닌, 발린 또는 메티오닌으로 치환되거나,(2) 서열번호 43의 아미노산 서열의 124번째 잔기에 상응하는 아미노산이 발린, 글리신, 프롤린, 알라닌, 류신 또는 메티오닌으로 치환되거나, 또는,(3) 상기 (1) 및 (2)가 모두 치환된, 단백질.
- 제1항에 있어서, 상기 단백질은 서열번호 56의 아미노산 서열과 99% 이상의 서열 상동성을 가지는 것인, 단백질.
- 제1항 내지 제3항 중 어느 한 항의 단백질을 암호화하는 폴리뉴클레오타이드.
- 제1항 내지 제3항 중 어느 한 항의 단백질 또는 상기 단백질을 암호화하는 폴리뉴클레오타이드를 포함하는, 미생물.
- 제5항에 있어서, 상기 미생물은 L-히스티딘 생산능을 갖는 것인, 미생물.
- 제5항에 있어서, 상기 미생물은 코리네박테리움 속 또는 에스케리키아 속인, 미생물.
- 제7항에 있어서, 상기 미생물은 코리네박테리움 글루타미쿰 또는 에스케리키아 콜라이인, 미생물.
- 제1항 내지 제3항 중 어느 한 항의 단백질,상기 단백질을 암호화하는 폴리뉴클레오타이드, 또는상기 폴리뉴클레오타이드를 포함하는 재조합 미생물을 포함하는, L-히스티딘 생산용 조성물.
- 제1항 내지 제3항 중 어느 한 항의 단백질 또는 상기 단백질을 암호화하는 폴리뉴클레오타이드를 포함하는 미생물을 배지에서 배양하는 단계를 포함하는, L-히스티딘 생산 방법.
- 제10항에 있어서, 상기 배양하는 단계 이후에, 배양된 미생물 또는 배지로부터 L-히스티딘을 회수하는 단계를 추가로 포함하는, L-히스티딘 생산 방법.
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| AU2023286302A1 (en) | 2025-01-09 |
| JP7847240B2 (ja) | 2026-04-16 |
| KR102801078B1 (ko) | 2025-04-24 |
| CN119451977A (zh) | 2025-02-14 |
| JP2025520724A (ja) | 2025-07-03 |
| MX2024015744A (es) | 2025-02-10 |
| CA3258191A1 (en) | 2025-03-18 |
| EP4538283A4 (en) | 2025-10-29 |
| EP4538283A1 (en) | 2025-04-16 |
| KR20240000169A (ko) | 2024-01-02 |
| CL2024003801A1 (es) | 2025-03-07 |
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