WO2023068722A1 - 리바우디오사이드 d 및 리바우디오사이드 m을 제조하는 방법 - Google Patents
리바우디오사이드 d 및 리바우디오사이드 m을 제조하는 방법 Download PDFInfo
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- WO2023068722A1 WO2023068722A1 PCT/KR2022/015809 KR2022015809W WO2023068722A1 WO 2023068722 A1 WO2023068722 A1 WO 2023068722A1 KR 2022015809 W KR2022015809 W KR 2022015809W WO 2023068722 A1 WO2023068722 A1 WO 2023068722A1
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- rebaudioside
- glycosyltransferase
- ugt
- seq
- amino acid
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- CVHZOJJKTDOEJC-UHFFFAOYSA-N saccharin Chemical compound C1=CC=C2C(=O)NS(=O)(=O)C2=C1 CVHZOJJKTDOEJC-UHFFFAOYSA-N 0.000 description 1
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Images
Classifications
-
- 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
- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/44—Preparation of O-glycosides, e.g. glucosides
- C12P19/56—Preparation of O-glycosides, e.g. glucosides having an oxygen atom of the saccharide radical directly bound to a condensed ring system having three or more carbocyclic rings, e.g. daunomycin, adriamycin
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/10—Transferases (2.)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/10—Transferases (2.)
- C12N9/1048—Glycosyltransferases (2.4)
- C12N9/1051—Hexosyltransferases (2.4.1)
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Y—ENZYMES
- C12Y204/00—Glycosyltransferases (2.4)
- C12Y204/01—Hexosyltransferases (2.4.1)
- C12Y204/01017—Glucuronosyltransferase (2.4.1.17)
Definitions
- the present application relates to a method for preparing rebaudioside D and rebaudioside M by the reaction of glycosyltransferase; And a composition for preparing rebaudioside D and rebaudioside M containing glycosyltransferase.
- Alternative sweeteners are continuously changing to synthetic high sweeteners (Saccharin, Aspartame, Sucralose, etc.), synthetic sugar alcohols (Maltitol, Xylitol), and high sweeteners (Rebaudioside A, Liquorice).
- synthetic high sweeteners sacharin, Aspartame, Sucralose, etc.
- synthetic sugar alcohols Mitol, Xylitol
- high sweeteners Rebaudioside A, Liquorice
- Stevia sweetener has high potential as an alternative sweetener as it is reported to have no calories, is positive for blood glucose and insulin levels, and has no side effects on the human body.
- Stevia is a perennial plant of the Asteraceae family native to Paraguay, South America, and its scientific name is Stevia rebaudiana Bertoni. Since stevia leaves contain components that are 200 to 300 times sweeter than sugar, these sweet components are extracted and used as natural sweeteners.
- the sweetening components of stevia extract include various steviol glycosides such as stevioside, rebaudioside A, rebaudioside C, rebaudioside D, rebaudioside M, rebaudioside I, and rebaudioside E. is included.
- stevioside STV
- rebaudioside A Reb A
- rebaudioside C Reb C
- Rebaudioside D (Reb D) and Rebaudioside M (Reb M) are less bitter than STV, Rebaudioside A, and Rebaudioside C and have excellent sweetness, so they are highly valued as alternative sweeteners.
- rebaudioside D and rebaudioside M are present in very small amounts in stevia leaves, and the method of extraction and purification from the leaves is expensive.
- One object of the present application is to convert glucose-linked nucleotide diphosphate in the presence of glycosyltransferase B (UGT-B), which is one or more proteins selected from the group consisting of proteins consisting of amino acid sequences represented by SEQ ID NOs: 1 to 3 It is to provide a method for producing rebaudioside D comprising the step of preparing rebaudioside D by reacting with rebaudioside A.
- UGT-B glycosyltransferase B
- Another object of the present application is to prepare rebaudioside D by reacting glucose-linked nucleotide diphosphate with rebaudioside A in the presence of glycosyltransferase B (UGT-B); and preparing rebaudioside M by reacting the rebaudioside D with glucose-linked nucleotide diphosphate in the presence of glycosyltransferase A (UGT-A), wherein the glycosyltransferase B is a sequence
- It is to provide a method for producing rebaudioside M which is one or more proteins selected from the group consisting of proteins consisting of amino acid sequences represented by numbers 1 to 3.
- Another object of the present application is to react sucrose, nucleotide diphosphate, rebaudioside A, sucrose synthase and the glycosyltransferase B (UGT-B) in the same reaction system to prepare rebaudioside D It is to provide a method for producing rebaudioside D from rebaudioside A comprising.
- sucrose, nucleotide diphosphate, rebaudioside A, rebaudioside D, sucrose synthase, glycosyltransferase A (UGT-A) and the glycosyltransferase B (UGT-B ) is reacted in situ to provide a method for preparing rebaudioside M from rebaudioside A, comprising the step of preparing rebaudioside M.
- Another object of the present application is to provide a composition for preparing rebaudioside D containing the glycosyltransferase B (UGT-B).
- Another object of the present application is to provide a composition for preparing rebaudioside M containing glycosyltransferase A (UGT-A) and glycosyltransferase B (UGT-B).
- Another object of the present application is to liquefy rebaudioside A of glycosyltransferase B (UGT-B), which is one or more proteins selected from the group consisting of proteins consisting of the amino acid sequences represented by SEQ ID NOs: 1 to 3. It is to provide a use as a glycosyltransferase that converts to baudioside D.
- UGT-B glycosyltransferase B
- the method for preparing rebaudioside D and rebaudioside M using glycosyltransferase B (UGT-B) according to the present application is a high-purity and high-yield rebaudioside D and rebaudioside M with almost no by-products. Since it can provide, it can be usefully used for mass production of rebaudioside D and rebaudioside M because it is economical using low-cost raw materials, the procedure is simple, and the time consumption is low.
- FIG. 2 shows that rebaudioside A is converted into rebaudioside D, rebaudioside D isomer and rebaudioside M isomer by glycosyltransferase B (UGT-B_7). This is the HPLC analysis result shown.
- FIG. 3 is an HPLC analysis result showing that rebaudioside A is converted to rebaudioside D by glycosyltransferase B (UGT-B_8).
- Figure 4 shows rebaudioside D, rebaudioside M, rebaudioside I and rebaudioside from stevioside by glycosyltransferase B (UGT-B_6), glycosyltransferase A (UGT-A) and sucrose synthase.
- This is an HPLC analysis result showing that Baudioside A is produced.
- Figure 5 is a rebaudioside M isomer (isomer), rebaudioside D, rebau from stevioside by glycosyltransferase B (UGT-B_7), glycosyltransferase A (UGT-A) and sucrose synthase
- UGT-B_7 glycosyltransferase B
- UGT-A glycosyltransferase A
- sucrose synthase This is an HPLC analysis result showing that dioside M, rebaudioside I and rebaudioside A are produced.
- One aspect of the present application is to convert glucose-linked nucleotide diphosphate to glycosyltransferase B (UGT-B), which is one or more proteins selected from the group consisting of proteins consisting of amino acid sequences represented by SEQ ID NOs: 1 to 3, in the presence of A method for producing rebaudioside D comprising the step of preparing rebaudioside D by reacting with rebaudioside A is provided.
- GNT-B glycosyltransferase B
- the term "udp (Uridine diphosphate)-glycosyltransferase (UGT)” refers to an activity that transfers a monosaccharide moiety from a glycosyl donor to a glycosyl acceptor molecule.
- an enzyme having, specifically, it refers to an enzyme that uses UDP-sugar as a glycosyl donor.
- the glycosyltransferase may be used interchangeably with "UDP-glycosyltransferase" and "UGT".
- the glycosyltransferase may be produced from recombinant Escherichia coli, Bacillus, yeast, Corynebacterium or Agrobacterium transformed with a vector containing the glycosyltransferase gene. It may be further refined or commercially manufactured products may be purchased and used, but are not limited thereto.
- the glycosyltransferase is known in the art, and protein and gene sequences of the glycosyltransferase can be obtained from known databases, such as NCBI's GenBank, but are not limited thereto.
- glycosyltransferase B which is at least one protein selected from the group consisting of proteins consisting of amino acid sequences represented by SEQ ID NOs: 1 to 3, converts rebaudioside A to rebaudioside D. It was the first time that it was identified that there is an enzyme activity that can be used to provide a new use of UGT-B.
- glycosyltransferase B (UGT-B) of the present application has and/or includes the amino acid sequence of SEQ ID NO: 1, the amino acid sequence of SEQ ID NO: 2, or the amino acid sequence of SEQ ID NO: 3, or the above amino acid sequence It may consist essentially of or consist of a sequence.
- glycosyltransferase B (UGT-B) of the present application is at least 70%, 75%, 80%, It may comprise amino acid sequences having at least 85%, 90%, 95%, 96%, 97%, 98%, 99%, 99.5%, 99.7% or 99.9% homology or identity.
- an amino acid sequence having such homology or identity and exhibiting an efficacy corresponding to the glycosyltransferase B (UGT-B) of the present application some of the sequences may have an amino acid sequence that is deleted, modified, substituted, conservatively substituted, or added. It is apparent that glycosyltransferase B (UGT-B) is also included within the scope of the present application.
- polypeptide or protein comprising the amino acid sequence described in a specific sequence number', 'a polypeptide or protein consisting of the amino acid sequence described in a specific sequence number', or 'a polypeptide or protein having an amino acid sequence described in a specific sequence number'
- a protein having an amino acid sequence in which some sequence is deleted, modified, substituted, conservatively substituted, or added can also be used in this application. is self-explanatory. For example, it is a case of adding a sequence that does not change the function of the protein, a naturally occurring mutation, a silent mutation thereof, or a conservative substitution to the N-terminus and/or C-terminus of the amino acid sequence. .
- conservative substitution means the substitution of one amino acid with another amino acid having similar structural and/or chemical properties. Such amino acid substitutions can generally occur based on similarities in 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 aspartate
- Aromatic amino acids include phenylalanine, tryptophan, and tyrosine
- hydrophobic amino acids include alanine, valine, isoleucine, leucine, methionine, phenylalanine, tyrosine, and tryptophan.
- amino acids can be classified into amino acids with electrically charged side chains and amino acids with uncharged side chains.
- Amino acids with electrically charged side chains are astric acid, glutamic acid, lysine , Arginine, including histidine
- amino acids with uncharged side chains can be further classified as nonpolar amino acids or polar amino acids, and nonpolar amino acids are glycine, alanine, valine, leucine, and isoleucine.
- Tryptophan, proline, and polar amino acids can be classified as including serine, threonine, cysteine, tyrosine, asparagine, and glutamine.
- conservative substitutions have little or no effect on the activity of the resulting polypeptide.
- conservative substitutions may have little or no effect on the activity of the protein or polypeptide.
- glycosyltransferase B may include deletions or additions of amino acids that have minimal impact on the secondary structure and properties of the polypeptide.
- a polypeptide may be conjugated with a signal (or leader) sequence at the N-terminus of a protein that is involved in protein transfer either co-translationally or post-translationally.
- the polypeptide may also be conjugated with other sequences or linkers to allow identification, purification, or synthesis of the polypeptide.
- the term 'homology' or 'identity' refers to the degree of similarity between two given amino acid sequences or base sequences and can be expressed as a percentage.
- the terms homology and identity are often used interchangeably.
- Sequence homology or identity of conserved polynucleotides or polypeptides can be determined by standard alignment algorithms, together with default gap penalties established by the program used. Substantially homologous or identical sequences are generally capable of hybridizing with all or part of the sequence under moderate or high stringent conditions. It is obvious that hybridization also includes hybridization with polynucleotides containing common codons or codons in consideration of codon degeneracy in polynucleotides.
- GAP program can define the total number of symbols in the shorter of the two sequences divided by the number of similarly arranged symbols (i.e., nucleotides or amino acids).
- the default parameters for the GAP program are (1) a binary comparison matrix (containing values of 1 for identity and 0 for non-identity) and Schwartz and Dayhoff, eds., Atlas Of Protein Sequence And Structure, National Biomedical Research Foundation , pp. 353-358 (1979), Gribskov et al (1986) Nucl. Acids Res. 14: weighted comparison matrix of 6745 (or EDNAFULL (EMBOSS version of NCBI NUC4.4) substitution matrix); (2) a penalty of 3.0 for each gap and an additional penalty of 0.10 for each symbol in each gap (or 10 gap opening penalty, 0.5 gap extension penalty); and (3) no penalty for end gaps.
- the glycosyltransferase B (UGT-B) of the present application may have an activity that converts rebaudioside A to rebaudioside D.
- corresponding to refers to an amino acid residue at a recited position in a polypeptide, or an amino acid residue that is similar, identical, or homologous to a recited residue in a polypeptide. Identification of the amino acid at the corresponding position may be determining the specific amino acid in the sequence that references the specific sequence.
- corresponding region generally refers to a similar or corresponding position in a related or reference protein.
- any amino acid sequence can be aligned with SEQ ID NO: 1, and based on this, each amino acid residue of the amino acid sequence can be numbered with reference to the numerical position of the amino acid residue corresponding to the amino acid residue of SEQ ID NO: 1.
- sequence alignment algorithms such as those described herein, can identify the location of amino acids, or locations where modifications such as substitutions, insertions, or deletions occur, compared to a query sequence (also referred to as a “reference sequence”).
- Such alignments include, for example, the Needleman-Wunsch algorithm (Needleman and Wunsch, 1970, J. Mol. Biol. 48: 443-453), the Needleman program in the EMBOSS package (EMBOSS: The European Molecular Biology Open Software Suite, Rice et al. , 2000), Trends Genet. 16: 276-277) may be used, but it is not limited thereto, and a sequence alignment program known in the art, a pairwise sequence comparison algorithm, and the like may be appropriately used.
- glycosyltransferase B (UGT-B) of the present application is not only the nucleotide sequence encoding the amino acid described in each sequence number, but also 80% or more, preferably 90% or more, more preferably 90% or more of the sequence.
- a nucleotide sequence exhibiting 95% or more, more preferably 98% or more, and most preferably 99% or more homology as long as it is a gene sequence encoding a protein that exhibits substantially the same or corresponding efficacy as each of the above proteins, without limitation include
- a nucleotide sequence having such homology it is obvious that a nucleotide sequence in which some sequences are deleted, modified, substituted, or added is also included within the scope of the present application.
- polynucleotide is a polymer of nucleotides in which nucleotide monomers are connected in a long chain shape by covalent bonds, and is a DNA or RNA strand of a certain length or more, more specifically, the glycosyltransferase B It means a polynucleotide fragment encoding (UGT-B).
- the polynucleotide encoding glycosyltransferase B (UGT-B) of the present application may include a nucleotide sequence encoding the amino acid sequence described in SEQ ID NO: 1, SEQ ID NO: 2, or SEQ ID NO: 3.
- the polynucleotide may have or include a sequence of SEQ ID NO: 6, SEQ ID NO: 7, or SEQ ID NO: 8.
- the polynucleotide may consist of or essentially consist of the sequence of SEQ ID NO: 6, SEQ ID NO: 7 or SEQ ID NO: 8.
- the polynucleotide of the present application considers the degeneracy of codons or codons preferred in organisms intended to express the glycosyltransferase B (UGT-B) of the present application, Various modifications may be made to the coding region within the range of not changing the amino acid sequence of B).
- the polynucleotide of the present application has 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 95% or more homology or identity to the sequence of SEQ ID NO: 6, SEQ ID NO: 7 or SEQ ID NO: 8 have or contain at least 96%, at least 97%, at least 98%, and less than 100% of the nucleotide sequence, or at least 70% homology or identity with the sequence of SEQ ID NO: 6, SEQ ID NO: 7 or SEQ ID NO: 8; 75% or more, 80% or more, 85% or more, 90% or more, 95% or more, 96% or more, 97% or more, 98% or more, and less than 100% may consist of or consist essentially of, but are not limited thereto don't
- polynucleotide of the present application is included without limitation as long as it is a probe that can be prepared from a known gene sequence, for example, a sequence that can hybridize under stringent conditions with a sequence complementary to all or part of the polynucleotide sequence of the present application.
- stringent condition means a condition that allows specific hybridization between polynucleotides. These conditions are described in J. Sambrook et al., Molecular Cloning, A Laboratory Manual, 2nd Edition, Cold Spring Harbor Laboratory press, Cold Spring Harbor, New York, 1989; F.M. Ausubel et al., Current Protocols in Molecular Biology, John Wiley & Sons, Inc., New York, 9.50-9.51, 11.7-11.8).
- polynucleotides with high homology or identity 70% or more, 75% or more, 80% or more, 85% or more, 90% or more, 95% or more, 96% or more, 97% or more, 98% or more, Or a condition in which polynucleotides having 99% or more homology or identity hybridize and polynucleotides having lower homology or identity do not hybridize, or 60 ° C., which is a washing condition for normal southern hybridization, 1 ⁇ SSC, 0.1% SDS, specifically at 60°C, 0.1 ⁇ SSC, 0.1% SDS, more specifically at a salt concentration and temperature equivalent to 68°C, 0.1 ⁇ SSC, 0.1% SDS, washed once, specifically 2 to 3 times conditions can be enumerated.
- Hybridization requires that two nucleic acids have complementary sequences, although mismatches between bases are possible depending on the stringency of hybridization.
- complementary is used to describe the relationship between nucleotide bases that are capable of hybridizing to each other. For example, with respect to DNA, adenine is complementary to thymine and cytosine is complementary to guanine.
- the polynucleotides of the present application may also include substantially similar nucleic acid sequences as well as isolated nucleic acid fragments complementary to the entire sequence.
- a polynucleotide having homology or identity to the polynucleotide of the present application can be detected using hybridization conditions including a hybridization step at a Tm value of 55°C and using the above-described conditions.
- the Tm value may be 60 ° C, 63 ° C or 65 ° C, but is not limited thereto and may be appropriately adjusted by those skilled in the art according to the purpose.
- Appropriate stringency for hybridizing the polynucleotides depends on the length of the polynucleotides and the degree of complementarity, parameters well known in the art (e.g., J. Sambrook et al., supra).
- the glucose-linked nucleotide diphosphate may be prepared by reacting sucrose and nucleotide diphosphate in the presence of sucrose synthase, but is not limited thereto.
- sucrose synthase is responsible for producing sucrose by reversibly transferring glucose to which nucleotide diphosphate is bound to fructose in plant metabolism, and in the present invention, sucrose and nucleotides in the pH range of 5 to 10 It shows the activity of reacting diphosphate to separate glucose-bound nucleotide diphosphate and fructose.
- the sucrose synthase may be a sucrose synthase derived from rice, corn, wheat, bamboo, Arabidopsis, grass, barley, sorghum or potato, preferably a sucrose synthase derived from rice, corn, wheat, or barley and, more preferably, it may be a sucrose synthase derived from rice, particularly Oryza sativa.
- the sucrose synthase may be produced from recombinant E. coli, Bacillus, yeast, Corynebacterium or Agrobacterium transformed with a vector containing the sucrose synthetase gene, and may be further purified after production from the E. coli or the like. And, it may be a sucrose synthase known in the art or commercially available, but is not limited thereto.
- sucrose synthase of the present application may have and/or include the amino acid sequence set forth in SEQ ID NO: 5, or may consist essentially of or consist of the amino acid sequence.
- the sucrose can be used without limitation as long as it can act as a substrate for sucrose synthase to provide glucose to nucleotide diphosphate.
- raw sugar or sugar may be used, but is not limited thereto.
- nucleotide diphosphate may be purine nucleotide or pyrimidine nucleotide, preferably uridine diphosphate, but is not limited thereto.
- the glucose-linked nucleotide diphosphate can react with rebaudioside A by the glycosyltransferase B (UGT-B) of the present application to generate rebaudioside D.
- UGT-B glycosyltransferase B
- the rebaudioside A may be prepared by reacting glucose-linked nucleotide diphosphate with stevioside in the presence of glycosyltransferase A (UGT-A), but is not limited thereto. .
- UGT-A glycosyltransferase A
- glycosyltransferase A can react glucose-linked nucleotide diphosphate with stevioside to produce rebaudioside A.
- the glycosyltransferase A may be a glycosyltransferase derived from Oryza sativa, Stevia rebaudiana Bertoni, Bambusa oldhamii, Brachypodium distachyon, Hordeum vulgare, Sorghum bicolor, Zea mays, or Arabidopsis thaliana.
- the glycosyltransferase may be a glycosyltransferase derived from Oryza sativa, Stevia rebaudiana Bertoni, or Bambusa oldhamii. More preferably, it may be a glycosyltransferase derived from Stevia rebaudiana Bertoni.
- the glycosyltransferase A may be produced from recombinant Escherichia coli, Bacillus, yeast, Corynebacterium or Agrobacterium transformed with a vector containing the glycosyltransferase gene, and produced from the E. coli, etc. After further purification, it may be a glycosyltransferase known in the art or commercially available, but is not limited thereto.
- glycosyltransferase A (UGT-A) of the present application may have and/or include the amino acid sequence set forth in SEQ ID NO: 4, or may consist essentially of or consist of the amino acid sequence. .
- the stevioside is a by-product after the production of rebaudioside A of Stevia rebaudiana hot water or ethanol aqueous solution extract or a purified product or extract thereof, and the stevioside content is 10% or more by weight based on the total weight of steviol glycosides, preferably 50% by weight or more, particularly preferably 70% by weight or more, more particularly preferably 80% by weight or more can be used, but is not limited thereto.
- the rebaudioside D may be prepared as shown in Scheme 1 below, but is not limited thereto.
- the preparation method may be performed continuously in the same reaction system.
- in situ reaction system refers to a reaction that occurs continuously in one reaction system or reaction system.
- the production method of the present application is to synthesize rebaudioside A in high yield by specifically binding one glucose to the C-3 'position of stevioside 13-O-glucose by the above reaction scheme 1, and rebau A continuous reaction system for synthesizing rebaudioside D from dioside A is provided.
- the glycosyltransferase B is a protein consisting of the amino acid sequence represented by SEQ ID NO: 2, and a rebaudioside D isomer may be additionally produced, but is not limited thereto. .
- the rebaudioside D may have the following structural formula, but is not limited thereto.
- Another aspect of the present application is to prepare rebaudioside D by reacting glucose-linked nucleotide diphosphate with rebaudioside A in the presence of glycosyltransferase B (UGT-B); and
- rebaudioside M by reacting the rebaudioside D with glucose-linked nucleotide diphosphate in the presence of glycosyltransferase A (UGT-A);
- the glycosyltransferase B is one or more proteins selected from the group consisting of proteins consisting of amino acid sequences represented by SEQ ID NOs: 1 to 3.
- nucleotide diphosphate glycosyltransferase B (UGT-B)
- rebaudioside A rebaudioside D
- the glucose-linked nucleotide diphosphate may be prepared by reacting sucrose and nucleotide diphosphate in the presence of sucrose synthase, as shown in Reaction Scheme 1, but is not limited thereto.
- sucrose synthase of the present application may have and/or include the amino acid sequence set forth in SEQ ID NO: 5, or may consist essentially of or consist of the amino acid sequence.
- the rebaudioside A is prepared by reacting glucose-linked nucleotide diphosphate with stevioside in the presence of glycosyltransferase A (UGT-A), as shown in Scheme 1 above. It may be, but is not limited thereto.
- glycosyltransferase A may have and/or include, or consist essentially of, the amino acid sequence shown in SEQ ID NO: 4.
- glycosyltransferase A of the present application can react glucose-linked nucleotide diphosphate with rebaudioside D to generate rebaudioside M.
- glycosyltransferase A (UGT-A) of the present application may have and/or include the amino acid sequence set forth in SEQ ID NO: 4, or may consist essentially of or consist of the amino acid sequence. .
- the rebaudioside M may be prepared as shown in Scheme 2 below, but is not limited thereto.
- the preparation method may be performed continuously in the same reaction system.
- the production method of the present application synthesizes rebaudioside A from stevioside in high yield by the above reaction scheme 2, synthesizes rebaudioside D from rebaudioside A, and synthesizes rebaudioside D from rebaudioside D.
- a continuous reaction system for synthesizing Baudioside M is provided.
- bitter components such as stevioside and rebaudioside A contained in the stevia extract can be tasted by using easily available and inexpensive raw materials such as stevioside and rebaudioside A. Since it can be converted into rebaudioside D and rebaudioside M, which are excellent components, it can be usefully used to produce a stevia sweetener with excellent sweetness.
- the glycosyltransferase B is a protein consisting of the amino acid sequence represented by SEQ ID NO: 2, and rebaudioside M isomer may be additionally produced, but is not limited thereto. .
- the rebaudioside M may have the following structural formula, but is not limited thereto.
- rebaudioside D by reacting sucrose, nucleotide diphosphate, rebaudioside A, sucrose synthase and glycosyltransferase B (UGT-B) in situ include,
- the glycosyltransferase B is one or more proteins selected from the group consisting of proteins consisting of amino acid sequences represented by SEQ ID NOs: 1 to 3, providing a method for preparing rebaudioside D from rebaudioside A .
- sucrose, nucleotide diphosphate, rebaudioside A, sucrose synthase, glycosyltransferase B (UGT-B), rebaudioside D and the in situ reaction system are as described above.
- the glycosyltransferase B is a protein consisting of the amino acid sequence represented by SEQ ID NO: 2, and a rebaudioside D isomer may be additionally produced, but is not limited thereto. .
- sucrose nucleotide diphosphate
- rebaudioside A nucleotide diphosphate
- rebaudioside D sucrose synthase
- glycosyltransferase A glycosyltransferase A
- UT-B glycosyltransferase B Reacting in situ to prepare rebaudioside M
- the glycosyltransferase B is one or more proteins selected from the group consisting of proteins consisting of amino acid sequences represented by SEQ ID NOs: 1 to 3, providing a method for preparing rebaudioside M from rebaudioside A .
- sucrose, nucleotide diphosphate, rebaudioside A, rebaudioside D, sucrose synthase, glycosyltransferase A (UGT-A), glycosyltransferase B (UGT-B), in situ and rebaudioside M is as described above.
- glycosyltransferase A may be a protein consisting of the amino acid sequence represented by SEQ ID NO: 4, but is not limited thereto.
- the glycosyltransferase B is a protein consisting of the amino acid sequence represented by SEQ ID NO: 2, and rebaudioside M isomer may be additionally produced, but is not limited thereto. .
- glycosyltransferase B (UGT-B), wherein the glycosyltransferase B is one or more proteins selected from the group consisting of proteins consisting of amino acid sequences represented by SEQ ID NOs: 1 to 3 It provides a composition for preparing rebaudioside D, which is.
- glycosyltransferase B (UGT-B) and rebaudioside D are as described above.
- the glycosyltransferase B is a protein consisting of the amino acid sequence represented by SEQ ID NO: 1, SEQ ID NO: 2, or SEQ ID NO: 3, and the rebaudioside D is rebaudioside D, rebau It may be one or more selected from the group consisting of dioside D isomer, but is not limited thereto.
- glycosyltransferase A (UGT-A) and glycosyltransferase B (UGT-B), wherein the glycosyltransferase A (UGT-A) is an amino acid represented by SEQ ID NO: 4 sequence, and the glycosyltransferase B (UGT-B) is one or more proteins selected from the group consisting of proteins consisting of the amino acid sequences represented by SEQ ID NOs: 1 to 3, for preparing rebaudioside M composition is provided.
- the glycosyltransferase A (UGT-A) is an amino acid represented by SEQ ID NO: 4 sequence
- the glycosyltransferase B (UGT-B) is one or more proteins selected from the group consisting of proteins consisting of the amino acid sequences represented by SEQ ID NOs: 1 to 3, for preparing rebaudioside M composition is provided.
- glycosyltransferase A (UGT-A), glycosyltransferase B (UGT-B) and rebaudioside M are as described above.
- the glycosyltransferase B is a protein consisting of the amino acid sequence represented by SEQ ID NO: 1, SEQ ID NO: 2, or SEQ ID NO: 3, and the rebaudioside M is rebaudioside M, rebau Dioside M may be one or more selected from the group consisting of isomers, but is not limited thereto.
- composition of the present application may further include any suitable excipient commonly used in amino acid production compositions, and such an excipient may be, for example, a preservative, a wetting agent, a dispersing agent, a suspending agent, a buffer, a stabilizer, or an isotonic agent. However, it is not limited thereto.
- rebaudioside A of glycotransferase B which is one or more proteins selected from the group consisting of proteins consisting of the amino acid sequences represented by SEQ ID NOs: 1 to 3, is Use as a glycosyltransferase to convert to rebaudioside D is provided.
- glycosyltransferase A (UGT-A)
- glycosyltransferase B (UGT-B)
- rebaudioside A (rebaudioside M)
- glycosyltransferase B (UGT-B) of the present application
- the glycosyltransferase B (UGT-B) was expressed and used in the reaction.
- Culture conditions of the recombinant microorganisms are as follows.
- Example 1-1 E. coli culture conditions
- the recombinant E. coli culture was inoculated into a test tube containing 5 ml of LB medium containing kanamycin at a concentration of 50 ⁇ g/ml, and seed culture was performed in an incubator at 37° C. until the absorbance at 600 nm was 2.0.
- the seed culture was added to a flask containing 500ml of LB medium containing kanamycin at a concentration of 50 ⁇ g/ml, followed by main culture.
- 0.1 mM IPTG isopropyl ß-D-1-thiogalactothiopyranoside
- the stirring speed was adjusted to 180 rpm and the culture temperature was maintained at 37° C., and after the addition of IPTG, the culture was performed at a stirring speed of 120 rpm.
- Example 1-2 Corynebacteria culture conditions
- glycosyltransferase B (UGT-B; SEQ ID NO: 1, SEQ ID NO: 2 or SEQ ID NO: 3) of the present application that converts rebaudioside A to rebaudioside D
- encoding glycosyltransferase B of the present application Each recombinant plasmid (vector-pET28a) containing the gene (SEQ ID NO: 6, SEQ ID NO: 7 or SEQ ID NO: 8) was constructed and cloned into E. coli BL21 (DE3), and each enzyme was expressed in large quantities and then purified and used. .
- the culture of the recombinant strain BL21 (DE3) was inoculated into a test tube containing 5 ml of LB medium, and seed culture was performed in an incubator at 37° C. until the absorbance at 600 nm was 2.0.
- the seed culture was added to a flask containing 500 ml of LB medium to carry out main culture.
- 0.1 mM IPTG isopropyl ⁇ -D-1-thiogalactothiopyranoside
- the stirring speed was adjusted to 180 rpm and the culture temperature was maintained at 37 ° C.
- the mixture was cultured at a stirring speed of 120 rpm and a culture temperature of 16 ° C.
- the culture solution of the transformed strain was centrifuged at 6000xg at 4° C. for 20 minutes to separate only the cell supernatant as an enzyme solution. In order to accurately characterize the enzyme, it was purified using a Ni-NTA superflow column.
- Enzymes mass-expressed using recombinant plasmids containing SEQ ID NO: 6, SEQ ID NO: 7, or SEQ ID NO: 8 were named UGT-B_6, UGT-B_7, and UGT-B_8.
- a fermentor containing the obtained culture medium containing kanamycin at a concentration of 10 ⁇ g/ml (glucose 80 g/L, soytone 20 g/L, (NH4)2SO4 10 g/L, KH2PO4 1.2 g/L, MgSO4 1.4 g/L)
- glucose 80 g/L soytone 20 g/L
- NH4SO4 10 g/L KH2PO4 1.2 g/L
- Example 2-2 Enzymatic activity measurement of glycosyltransferase B (UGT-B) for rebaudioside A raw material
- glycosyltransferase B (UGT-B) with respect to rebaudioside A raw material was measured using each of the enzymes prepared in Example 2-1.
- the raw material used in the enzyme reaction was rebaudioside A (Daepyeong) dissolved in water to a concentration of 2 mM, and each enzyme prepared in Example 2-1 expressed in microorganisms was used at 37 degrees.
- the reaction was carried out for 16 hours and then analyzed by HPLC.
- the raw material aqueous solution may contain 2mM of UDP-glucose or UDP (Uridine-diphosphate).
- HPLC analysis conditions are as follows.
- Capcell pak C18 MG II (Shiseido, 250 x 4.6 mm, particle size: 5 ⁇ m)
- rebaudioside A was converted to rebaudioside D by glycosyltransferase B (UGT-B_6 and UGT-B_8) of the present application. It was confirmed that rebaudioside A was converted into rebaudioside M isomer, rebaudioside D isomer and rebaudioside D by the glycosyltransferase (UGT-B_7) of .
- Glycose transferase A (UGT-A) and sucrose synthetase were purified and used using the method of the prior literature (WO 2014 / 133248), and their sequences are shown in SEQ ID NO: 4 and SEQ ID NO: 5, respectively.
- glycosyltransferase A (UGT-A)
- sucrose synthase sucrose synthase
- UGT-B glycosyltransferase B
- raw materials used in the enzyme reaction were 2mM stevioside (haigen) and 50mM sugar (CJ CheilJedang) aqueous solution, and the glycosyltransferase A (UGT-A) expressed in microorganisms, the sucrose synthase and the The reaction was carried out at 37 degrees for 24 hours using each glycosyltransferase B (UGT-B) prepared in Example 2-1, and then analyzed by HPLC.
- the raw material aqueous solution may contain 2mM of UDP-glucose or UDP (Uridine-diphosphate).
- HPLC analysis conditions are as follows.
- Capcell pak C18 MG II (Shiseido, 250 x 4.6 mm, particle size: 5 ⁇ m)
- the conversion rate from rebaudioside D to rebaudioside M was measured using the glycosyltransferase A (UGT-A) of Example 3.
- the raw material used in the enzyme reaction was used by dissolving rebaudioside D (haigen) in water to 1 mM, and using the glycosyltransferase A (UGT-A) expressed in microorganisms, 16 After the reaction proceeded for an hour, it was analyzed by HPLC.
- the raw material aqueous solution may contain 2mM of UDP-glucose or UDP (Uridine-diphosphate).
- HPLC analysis conditions are as follows.
- Capcell pak C18 MG II (Shiseido, 250 x 4.6 mm, particle size: 5 ⁇ m)
- the measurement results are shown in FIG. 7 .
- Example 5 Liquid chromatography mass spectrometry (LC-MS/MS) analysis of rebaudioside D isomer and rebaudioside M isomer
- RebD standard and Unknown peak 1 As a result, as shown in FIGS. 8 and 9, as a result of comparing RebD Standard and Unknown peak 1 that received the fraction, RebD standard and Unknown peak 1 have the same molecular weight and MSMS fragments match, but peak retention times are different. It was identified as an isomer of RebD.
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Abstract
Description
샘플명 |
리바우디오사이드 M 아이소머 함량
(%) |
리바우디오사이드 D 아이소머 함량
(%) |
리바우디오사이드 D 함량(%) | 리바우디오사이드 A 함량(%) |
원료(반응 0시간) | 0.3 | 99.7 | ||
UGT-B_6 | 39.5 | 60.5 | ||
UGT-B_7 | 31.5 | 14.1 | 44.0 | 10.4 |
UGT-B_8 | 76.1 | 23.9 |
샘플명 |
리바우디오사이드 M
아이소머 (isomer) (%) |
리바우디오사이드 D (%) | 리바우디오사이드 M (%) | 리바우디오사이드 I (%) | 리바우디오사이드 A (%) | 스테비오사이드 (%) |
원료(반응 0시간) | 0 | 0 | 0 | 0 | 4.6 | 95.4 |
UGT-B_6, 당전이효소 A(UGT-A) 및 수크로오스 합성효소 | 0 | 24.3 | 12.1 | 1.8 | 61.8 | 0 |
UGT-B_7, 당전이효소 A(UGT-A) 및 수크로오스 합성효소 | 37.5 | 35 | 16.7 | 10.8 | 0 | 0 |
UGT-B_8, 당전이효소 A(UGT-A) 및 수크로오스 합성효소 | 0 | 31.0 | 34.3 | 4.7 | 30 | 0 |
크로마토그래피 | Waters Acquity UPLC |
컬럼 | Waters Acquity UPLC BEH C18 1.7um 2.1x150mm |
컬럼온도 | 40 ℃ |
유속 | 0.20 mL/min |
시료 주입 | 1.0 μL |
용매 | A: 증류수B: 50% Acetonitrile |
Time(min) | %A | %B |
0 | 55.0 | 45.0 |
0.50 | 55.0 | 45.0 |
3.00 | 52.5 | 47.5 |
6.00 | 52.4 | 47.6 |
9.00 | 47.5 | 52.5 |
9.10 | 0.0 | 100.0 |
10.00 | 0.0 | 100.0 |
10.10 | 55.0 | 45.0 |
15.00 | 55.0 | 45.0 |
Ionization mode | ESI Negative mode |
Capillary voltage | 2.5 kV |
Cone voltage | 30 V |
Source Temperature | 120 ℃ |
Claims (24)
- 포도당이 결합된 뉴클레오티드 디포스페이트를 당전이효소 B(UGT-B)의 존재하에 리바우디오사이드 A와 반응시켜 리바우디오사이드 D를 제조하는 단계를 포함하고,상기 당전이효소 B는 서열번호 1 내지 3으로 표시되는 아미노산 서열로 이루어진 단백질로 이루어진 군에서 선택된 1종 이상의 단백질인 것인, 리바우디오사이드 D의 제조 방법.
- 제1항에 있어서, 상기 포도당이 결합된 뉴클레오티드 디포스페이트는 수크로오스와 뉴클레오티드 디포스페이트를 수크로오스 합성효소 존재하에 반응시켜 제조한 것인, 제조 방법.
- 제1항에 있어서, 상기 리바우디오사이드 A는 포도당이 결합된 뉴클레오티드 디포스페이트를 당전이효소 A(UGT-A)의 존재하에 스테비오사이드와 반응시켜 제조한 것인, 제조 방법.
- 제2항에 있어서, 상기 수크로오스 합성효소는 서열번호 5로 표시되는 아미노산 서열로 이루어진 단백질인 것인, 제조 방법.
- 제3항에 있어서, 상기 당전이효소 A(UGT-A)는 서열번호 4로 표시되는 아미노산 서열로 이루어진 단백질인 것인, 제조 방법.
- 제1항에 있어서, 상기 당전이효소 B는 서열번호 2로 표시되는 아미노산 서열로 이루어진 단백질이고, 리바우디오사이드 D 아이소머 (isomer) 가 추가로 제조되는 것인, 제조 방법.
- 제1항 내지 제6항 중 어느 하나의 항에 있어서, 상기 제조 방법은 동일 반응계에서 연속적으로 이루어지는 것인, 제조 방법.
- 포도당이 결합된 뉴클레오티드 디포스페이트를 당전이효소 B(UGT-B)의 존재하에 리바우디오사이드 A와 반응시켜 리바우디오사이드 D를 제조하는 단계; 및상기 리바우디오사이드 D를 당전이효소 A(UGT-A)의 존재하에 포도당이 결합된 뉴클레오티드 디포스페이트와 반응시켜 리바우디오사이드 M을 제조하는 단계를 포함하고,상기 당전이효소 B는 서열번호 1 내지 3으로 표시되는 아미노산 서열로 이루어진 단백질로 이루어진 군에서 선택된 1종 이상의 단백질인 것인, 리바우디오사이드 M의 제조 방법.
- 제8항에 있어서, 상기 당전이효소 A(UGT-A)는 서열번호 4로 표시되는 아미노산 서열로 이루어진 단백질인 것인, 제조 방법.
- 제8항에 있어서, 상기 포도당이 결합된 뉴클레오티드 디포스페이트는 수크로오스와 뉴클레오티드 디포스페이트를 수크로오스 합성효소 존재하에 반응시켜 제조한 것인, 제조 방법.
- 제8항에 있어서, 상기 리바우디오사이드 A는 포도당이 결합된 뉴클레오티드 디포스페이트를 당전이효소 A(UGT-A)의 존재하에 스테비오사이드와 반응시켜 제조한 것인, 제조 방법.
- 제10항에 있어서, 상기 수크로오스 합성효소는 서열번호 5로 표시되는 아미노산 서열로 이루어진 단백질인 것인, 제조 방법.
- 제11항에 있어서, 상기 당전이효소 A(UGT-A)는 서열번호 4로 표시되는 아미노산 서열로 이루어진 단백질인 것인, 제조 방법.
- 제8항에 있어서, 상기 당전이효소 B는 서열번호 2로 표시되는 아미노산 서열로 이루어진 단백질이고, 리바우디오사이드 M 아이소머 (isomer)가 추가로 제조되는 것인, 제조 방법.
- 제8항 내지 제14항 중 어느 하나의 항에 있어서, 상기 제조 방법은 동일 반응계에서 연속적으로 이루어지는 것인, 제조 방법.
- 수크로오스, 뉴클레오티드 디포스페이트, 리바우디오사이드 A, 수크로오스 합성효소 및 당전이효소 B(UGT-B)를 동일 반응계에서 반응시켜 리바우디오사이드 D를 제조하는 단계를 포함하고,상기 당전이효소 B는 서열번호 1 내지 3으로 표시되는 아미노산 서열로 이루어진 단백질로 이루어진 군에서 선택된 1종 이상의 단백질인 것인, 리바우디오사이드 A로부터 리바우디오사이드 D를 제조하는 방법.
- 제16항에 있어서, 상기 당전이효소 B는 서열번호 2로 표시되는 아미노산 서열로 이루어진 단백질이고, 리바우디오사이드 D 아이소머 (isomer) 가 추가로 제조되는 것인, 리바우디오사이드 A로부터 리바우디오사이드 D를 제조하는 방법.
- 수크로오스, 뉴클레오티드 디포스페이트, 리바우디오사이드 A, 리바우디오사이드 D, 수크로오스 합성효소, 당전이효소 A(UGT-A) 및 당전이효소 B(UGT-B)를 동일 반응계에서 반응시켜 리바우디오사이드 M을 제조하는 단계를 포함하고,상기 당전이효소 B는 서열번호 1 내지 3으로 표시되는 아미노산 서열로 이루어진 단백질로 이루어진 군에서 선택된 1종 이상의 단백질인 것인, 리바우디오사이드 A로부터 리바우디오사이드 M을 제조하는 방법.
- 제18항에 있어서, 상기 당전이효소 A(UGT-A)는 서열번호 4로 표시되는 아미노산 서열로 이루어진 단백질인 것인, 리바우디오사이드 A로부터 리바우디오사이드 M을 제조하는 방법.
- 제18항에 있어서, 상기 당전이효소 B는 서열번호 2로 표시되는 아미노산 서열로 이루어진 단백질이고, 리바우디오사이드 M 아이소머 (isomer) 가 추가로 제조되는 것인, 리바우디오사이드 A로부터 리바우디오사이드 M을 제조하는 방법.
- 서열번호 1 내지 3으로 표시되는 아미노산 서열로 이루어진 단백질로 이루어진 군에서 선택된 1종 이상의 당전이효소 B(UGT-B)를 포함하는 리바우디오사이드 D 제조용 조성물.
- 제21항에 있어서, 상기 당전이효소 B는 서열번호 2로 표시되는 아미노산 서열로 이루어진 단백질이고, 상기 리바우디오사이드 D는 리바우디오사이드 D, 리바우디오사이드 D 아이소머 (isomer) 로 이루어진 군에서 선택된 1종 이상인 것인, 리바우디오사이드 D 제조용 조성물.
- 서열번호 1 내지 3으로 표시되는 아미노산 서열로 이루어진 단백질로 이루어진 군에서 선택된 1종 이상의 당전이효소 B(UGT-B) 및서열번호 4로 표시되는 아미노산 서열로 이루어진 단백질인 당전이효소 A(UGT-A)를 포함하는 리바우디오사이드 M 제조용 조성물.
- 제23항에 있어서, 상기 당전이효소 B는 서열번호 2로 표시되는 아미노산 서열로 이루어진 단백질이고, 상기 리바우디오사이드 M은 리바우디오사이드 M, 리바우디오사이드 M 아이소머 (isomer) 로 이루어진 군에서 선택된 1종 이상인 것인, 리바우디오사이드 M 제조용 조성물.
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