WO2019132556A1 - 신규 내열성 과당-6-인산 3-에피머화 효소 및 이를 이용한 알룰로스 제조방법 - Google Patents
신규 내열성 과당-6-인산 3-에피머화 효소 및 이를 이용한 알룰로스 제조방법 Download PDFInfo
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- 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
- C12N15/11—DNA or RNA fragments; Modified forms thereof; Non-coding nucleic acids having a biological activity
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- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
- C12N9/90—Isomerases (5.)
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- 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
- C12P19/02—Monosaccharides
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- C12P19/00—Preparation of compounds containing saccharide radicals
- C12P19/24—Preparation of compounds containing saccharide radicals produced by the action of an isomerase, e.g. fructose
Definitions
- the present application relates to fructose-6-phosphate 3-epimerase and a method for producing alulose using the same.
- D-psicose 3-epimerase (EC 5.1.3.30) and D-tagatose 3-epimerase (EC 5.1.3.31) produced D-fructose in the presence of 3-epimerase (3-epimerization, 3-carbon epimerization), which is known as an enzyme capable of producing aluloses.
- 3-epimerase 3-epimerization, 3-carbon epimerization
- the present inventors have made an effort to develop a method that can increase the conversion rate to aluloses economically and industrially.
- glucose or glucose-1-phosphate, glucose-6-phosphate and fructose-6-phosphate from glucose, starch or maltodextrin which are economical raw materials.
- alulose-6-phosphate it is possible to produce alululose using allulose-6-phosphate phosphatase, which performs an irreversible reaction pathway, Considering that alululose can be produced by one-pot enzymatic conversions in which a plurality of enzymes involved in the production pathway of aluloses can be used at the same time and the conversion rate to alulose can be remarkably increased, -Phosphoric acid into allylulose-6-phosphate, the present application has been completed.
- One object of the present application is to provide a fructose-6-phosphate 3-epimerase comprising the amino acid sequence of SEQ ID NO: 1.
- Another object of the present application is to provide a nucleic acid encoding the fructose-6-phosphate 3-epimerase of the present application.
- Another object of the present invention is to provide a transformant comprising a nucleic acid encoding the fructose-6-phosphate 3-epimerase of the present application.
- Another object of the present invention is to provide a composition for producing allulose comprising the fructose-6-phosphate 3-epimerase of the present application, a microorganism expressing the same, or a culture of the microorganism.
- the heat-resistant fructose-6-phosphate 3-epimerase of the present application has heat resistance and can be industrially carried out to convert fructose-6-phosphate into allylulose-6-phosphate, and using an economical raw material, It is possible to proceed the synthesis pathway, and it is possible to produce aluloses by the allylulose-6-phosphate dephosphorylation reaction, which is an irreversible reaction pathway, so that the conversion to alulose can be markedly increased.
- the method for producing aluloses using the fructose-6-phosphate 3-epimerase of the present application can increase the conversion rate to aluloses, so that the resultant reaction can include allylose at a high concentration to simplify or eliminate the separation and purification process
- the bar has a simple and economical manufacturing method.
- Figure 1 shows the reaction pathways in which aluloses can be prepared from starch (e.g., maltodextrin), sucrose or glucose.
- starch e.g., maltodextrin
- sucrose e.g., glucose
- FIG. 2 shows the results of analysis of the molecular weight of the fructose-6-phosphate 3-epimerase (FP3E) of the present application by protein electrophoresis (SDS-PAGE).
- FIG. 3 shows the conversion activity of fructose-6-phosphate 3-epimerase of the present application from fructose-6-phosphate to alulose-6-phosphate.
- Fig. 4 shows the activity of the fructose-6-phosphate 3-epimerase of the present application according to pH.
- FIG. 5 shows the activity of the fructose-6-phosphate 3-epimerase of the present application according to the temperature.
- Fig. 6 shows the activity of the fructose-6-phosphate 3-epimerase of the present application upon addition of a metal ion.
- the present application provides, as one embodiment, a fructose-6-phosphate 3-epimerase consisting of the amino acid sequence of SEQ ID NO: 1.
- the fructose-6-phosphate 3-epimerase of the present application may comprise a polypeptide having at least 80%, 90%, 95%, 97% or 99% homology with the amino acid sequence of SEQ ID NO:
- a protein having an activity corresponding to the fructose-6-phosphate 3-epimerase consisting of the amino acid sequence of SEQ ID NO: 1 of the present application it may be added to the amino acid sequence of SEQ ID NO: 1 or a naturally occurring mutation, Or a silent mutation thereof, and the protein comprising the amino acid sequence of SEQ ID NO: 1 is also within the scope of the present application.
- the fructose-6-phosphate 3-epimerase may be encoded by the nucleotide sequence of SEQ ID NO: 2 and may be at least 80%, 90%, 95% , 97%, or 99% homologous to the nucleotide sequence shown in SEQ ID NO. It is obvious that a polynucleotide capable of being translated into a protein consisting of the amino acid sequence of SEQ ID NO: 1 or a protein having homology thereto by codon degeneracy can also be included in the scope of the present application.
- the term "homology” means the degree to which a given amino acid sequence or base sequence is consistent and can be expressed as a percentage.
- its homologous sequence having the same or similar activity as a given amino acid sequence or base sequence is referred to as "% homology ".
- standard software for calculating parameters such as score, identity and similarity, specifically BLAST 2.0, or by sequential hybridization experiments under defined stringent conditions, And the appropriate hybridization conditions to be defined are within the skill of the art and can be determined by methods well known to those skilled in the art (for example, J.
- " stringent conditions " as used herein refers to conditions that allow specific hybridization between polynucleotides. For example, these conditions are specifically described in the literature (e.g., J. Sambrook et al., Same as above).
- the stringent conditions can be adjusted to ascertain homology.
- hybridization conditions of low stringency corresponding to a Tm value of 55 ° C, may be used, for example, 5XSSC, 0.1% SDS, 0.25% milk, and formamide; Or 30% formamide, 5XSSC, 0.5% SDS conditions may be used.
- Hybridization conditions of mild stringency correspond to high Tm values, for example 40% formamide with 5X or 6X SSC can be used.
- High stringency hybridization conditions correspond to the highest Tm values, for example, 50% formamide, 5X or 6XSSC conditions may be used.
- the present invention is not limited to the above example.
- Hybridization requires that two nucleic acids have a complementary sequence, although mismatches between bases are possible, depending on the severity of hybridization.
- complementary is used to describe the relationship between nucleotide bases capable of hybridizing with each other. For example, with respect to DNA, adenosine is complementary to thymine and cytosine is complementary to guanine.
- the present application may also include substantially similar nucleic acid sequences as well as isolated nucleic acid fragments complementary to the entire sequence.
- polynucleotides having homology can be detected using hybridization conditions including the hybridization step at a Tm value of 55 ° C and using the conditions described above.
- the Tm value may be 60 ° C, 63 ° C, or 65 ° C, but is not limited thereto and may be suitably adjusted by those skilled in the art according to the purpose.
- the appropriate stringency of hybridizing the polynucleotide depends on the length and complementarity of the polynucleotide, and the variables are well known in the art. The greater the similarity or degree of homology between two nucleotide sequences, the larger the Tm value for hybrids of polynucleotides with such sequences.
- the relative stability of the hybridization of the polynucleotide decreases in the following order: RNA: RNA, DNA: RNA, DNA: DNA.
- the Tm calculation formula is known (see Sambrook et al., Supra, 9.50-9.51).
- Oligonucleotides mismatch positions can be more important and the length of oligonucleotides can determine their specificity (Sambrook et al., Supra, 11.7-11.8 Reference).
- the polynucleotide can be detected using a hybridization condition that is lower than the 500 mM salt and includes at least a hybridization step at 37 ° C, and a washing step at 2X SSPE at least 63 ° C.
- the hybridization conditions may be lower than 200 mM salt and may include a hybridization step of at least 37 < 0 > C.
- the hybridization conditions may include 63 ° C and 2XSSPE in both the hybridization and washing steps.
- the length of the hybridizing nucleic acid can be, for example, at least about 10 nucleotides, 15 nucleotides, 20 nucleotides, or at least 30 nucleotides.
- those skilled in the art will be able to adjust the temperature and wash solution salt concentration as needed depending on factors such as the length of the probe.
- the fructose-6-phosphate 3-epimerase of the present application may be an enzyme derived from the genus Thermotoga , and specifically, thermotoga but are not limited to, enzymes derived from petrophilia .
- the fructose-6-phosphate 3-epimerase of the present application has a pH of 5.0 to 10.0, 5.0 to 9.0, 5.0 to 8.0, 5.0 to 7.5, 6.0 to 10.0, 6.0 to 9.0, 6.0 to 8.0, 6.0 to 7.5, 6.5 to 10.0 , 90-99.9% relative to the maximum activity in the range of 6.5 to 9.0, 6.5 to 8.0, 6.5 to 7.5, 7.0 to 10.0, 7.0 to 9.0, 7.0 to 8.0, 7.0 to 7.5 or 7.5.
- the fructose-6-phosphate 3-epimerase of the present application may be used in an amount of from 40 to 90, 40 to 80, 40 to 70, 40 to 60, 50 to 90, 50 to 80, 50 to 70, 50 to 60, 55 to 90, 60 to 99.9%, 70 to 99.9%, 80 to 99.9%, or 90 to 99.9% of the maximum activity at 55 to 80, 55 to 70, 55 to 65, 58 to 63, .
- the fructose-6-phosphate 3-epimerase of the present application may be one whose activity increases in the presence of Mn, Mg or Ni ions.
- the present application provides, in another aspect, a nucleic acid encoding the fructose-6-phosphate 3-epimerase of the present application.
- the present application provides, as yet another embodiment, a transformant comprising a nucleic acid encoding the fructose-6-phosphate 3-epimerase of the present application.
- transformation in the present application means introducing a vector comprising a nucleic acid encoding a target protein into a host cell so that the protein encoded by the nucleic acid can be expressed in the host cell.
- the transformed nucleic acid may be either inserted into the chromosome of the host cell or located outside the chromosome, as long as it can be expressed in the host cell.
- the nucleic acid includes DNA and RNA encoding the target protein.
- the nucleic acid may be introduced in any form as long as it can be introduced into a host cell and expressed therefrom.
- the nucleic acid may be introduced into the host cell in the form of an expression cassette, which is a gene construct containing all the elements necessary for its expression.
- the expression cassette can typically include a promoter operably linked to the nucleic acid, a transcription termination signal, a ribosome binding site, and a translation termination signal.
- the expression cassette may be in the form of an expression vector capable of self-replication.
- the nucleic acid may be introduced into the host cell in its own form and operably linked to the sequence necessary for expression in the host cell, but is not limited thereto.
- operably linked means that the gene sequence is functionally linked to a promoter sequence that initiates and mediates transcription of a nucleic acid encoding the protein of interest of the present application.
- the method of transforming the vector of the present application includes any method of introducing a nucleic acid into a cell and may be carried out by selecting a suitable standard technique as known in the art depending on the host cell. For example, electroporation, calcium phosphate (CaPO 4 ) precipitation, calcium chloride (CaCl 2 ) precipitation, microinjection, polyethylene glycol (PEG) method, DEAE-dextran method, A lithium acetate-DMSO method, and the like, but are not limited thereto.
- the host cell it is preferable to use a host having a high efficiency of introducing DNA and a high efficiency of expression of the introduced DNA.
- a host having a high efficiency of introducing DNA and a high efficiency of expression of the introduced DNA.
- it may be E. coli, but is not limited thereto.
- a method for producing a fructose-6-phosphate 3-epimerase of the present application a microorganism expressing the fructose-6-phosphate 3-epimerase of the present application, 3-epimerase, and a culture of a microorganism expressing the 3-epimerase.
- the composition for producing an alulose of the present application may be prepared by using an enzyme involved in an alulose production route (see FIG. 1) of the present application, a microorganism expressing an enzyme participating in the alulose production route of the present application, A culture of a microorganism expressing an enzyme participating in the pathway may be additionally included.
- an enzyme involved in an alulose production route see FIG. 1 of the present application
- a microorganism expressing an enzyme participating in the alulose production route of the present application A culture of a microorganism expressing an enzyme participating in the pathway may be additionally included.
- the fructose-6-phosphate-epimerizing enzyme of the present application as an example, it is possible that the enzymes contained in the composition for producing aluloses of the present application and the substrate used for the production of aluloses are limited It does not.
- composition for the production of aluloses of the present application is composed of alulose-6-phosphate dephosphorylase, a microorganism expressing the alulose-6-phosphate dephosphorylase or the alulose-6- A culture of a microorganism expressing the phosphorylase may be additionally included.
- composition for producing aluloses of the present application comprises (a) (i) a starch, maltodextrin, sucrose or a combination thereof, glucose, glucose-1-phosphate, glucose-6-phosphate or fructose-6-phosphate; (ii) phosphate; (iii) alulose-6-phosphate dephosphorylase; (iv) Glucose-6-phosphate-isomerizing enzyme; (v) phosphoglucomutase or glucose phosphorylase; And / or (vi) a compound selected from the group consisting of? -Glucan phosphorylase, starch phosphorylase, maltodextrin phosphorylase, sucrose phosphorylase,?
- the starch / maltodextrin phosphorylase (EC 2.4.1.1) and? -Glucan phosphorylase of the present application phosphorylate phosphate to glucose and convert starch or maltodextrin to glucose -1-phosphate. ≪ / RTI >
- the sucrose phosphorylase (EC 2.4.1.7) of the present application may contain any protein as long as it is a protein having an activity of phosphorylating phosphate to glucose to produce glucose-1-phosphate from sucrose.
- Amylase (EC 3.2.1.1), pullulanse (EC 3.2.1.41), glucoamylase (EC 3.2.1.3), and isoamylase, which are starch hydrolyzate enzymes of the present application, May contain any protein as long as it is a protein having an activity of converting starch or maltodextrin to glucose.
- the sucrase (EC 3.2.1.26) of the present application may contain any protein as long as it is a protein having activity to convert sucrose to glucose.
- the phosphoglucomutase (EC 5.4.2.2) of the present application may contain any protein as long as it is a protein having an activity of converting glucose-1-phosphate into glucose-6-phosphate.
- Glucokinase may contain any protein that has the activity of converting phosphate into glucose and converting it to glucose-6-phosphate.
- the glucose phosphoinase may be a polyphosphate-dependent glucose phosphorylase, and more specifically, a dephosphorylated enzyme such as Deinococcus of amino acid sequence number 5 and base sequence number 7 geothermalis derived polyphosphate-dependent kinases glucose or amino acid SEQ ID NO: 6 and nucleotide SEQ ID NO: 8 of Anaerolinea thermophila- derived polyphosphate-dependent glucose phosphorylase.
- the glucose-6-phosphate-isomerizing enzyme of the present application may contain any protein as long as it is a protein having an activity of converting glucose-6-phosphate into fructose-6-phosphate.
- the allyl-6-phosphate dephosphorylase of the present application may contain any protein as long as the protein has an activity of converting alulos-6-phosphate to alulose. More specifically, the alulose-6-phosphate dephosphorylase may be a protein irreversibly active in converting alulose-6-phosphate into alulose.
- a fructose-6-phosphate 3-epimerase comprising the amino acid sequence of SEQ ID NO: 1, fructose-6-phosphate 3- 6-phosphate is converted to allulose-6-phosphate by contacting a microorganism expressing the epimerase or a culture of the microorganism expressing the fructose-6-phosphate 3-epimerase
- the method comprises the steps of:
- the production method of the present application is characterized in that after converting the fructose-6-phosphate of the present application to alululose-6-phosphate, alulose-6-phosphate dephosphorylase , Contacting the microorganism expressing the alulose-6-phosphate dephosphorylase or a culture of the microorganism expressing the alulos-6-phosphate dephosphorylase to convert the alulos-6-phosphate into alulose Step < / RTI >
- the production method of the present application is also characterized in that glucose-6-phosphate isomerase is added to glucose-6-phosphate before the step of converting fructose-6-phosphate into alulose-6- 6-phosphate isomerizing enzyme or a culture of the microorganism expressing the glucose-6-phosphate isomerizing enzyme is brought into contact with the glucose-6-phosphate isomerizing enzyme to convert the glucose-6-phosphate isomer into fructose- .
- the production method of the present application is characterized in that, prior to the step of converting the glucose-6-phosphate of the present application into fructose-6-phosphate, a phosphoglucomutase is added to glucose-
- the method may further comprise the step of bringing into contact a microorganism expressing glucomutase or a culture of a microorganism expressing the phosphoglucosimetase to convert the glucose-1-phosphate into glucose-6-phosphate.
- the production method of the present application is characterized in that, prior to the step of converting glucose-6-phosphate of the present application into fructose-6-phosphate, glucose glucose oxidase, a microorganism expressing the glucose phosphorylase, , And converting the glucose to glucose-6-phosphate by contacting the culture with a phosphate and a culture of a microorganism expressing the glucose.
- the production method of the present application can be carried out before the step of converting glucose-1-phosphate of the present application into glucose-6-phosphate, starch, maltodextrin, sucrose or a combination thereof with? -Glucan phosphorylase, Lyase, maltodextrin phosphorylase or sucrose phosphorylase; A microorganism expressing the phosphorylase; Or a culture of a microorganism expressing the phosphorylase, and a phosphate, and converting the starch, maltodextrin, sucrose or a combination thereof to glucose-1-phosphate.
- the production method of the present application can also be carried out before the step of converting the glucose of the present application into glucose-6-phosphate, or by adding ⁇ -amylase, Isoamylase; A microorganism expressing the amylase, the pluranase or the sucrase; Or converting the starch, maltodextrin, sucrose, or a combination thereof into glucose by contacting the amylase, the plurasease or sucrase with a culture of the microorganism.
- the production method of the present application is characterized in that 4- ⁇ -glucanotransferase, a microorganism expressing the 4- ⁇ -glucanotransferase, or a culture of the microorganism expressing the 4- ⁇ -glucanotransferase To convert the glucose to starch, maltodextrin or sucrose.
- the 'contact' of the present application can be carried out at a pH of 5.0 to 10.0, 50 to 90 ° C, and / or 1 minute to 24 hours.
- the contact of the present application is carried out at a pH of 5.0 to 10.0, 5.0 to 9.0, pH 5.0 to 8.0, pH 5.0 to 7.0, pH 5.0 to 6.0, pH 6.0 to 10.0, pH 6.0 to 9.0, pH 6.0 to 8.0, 7.0, pH 7.0 to 10.0, pH 7.0 to 9.0, pH 7.0 to 8.0, pH 8.0 to 10.0, pH 8.0 to 9.0, or pH 9.0 to 10.0.
- the contact of the present application can be carried out at 50 ⁇ to 90 ⁇ , 55 ⁇ to 90 ⁇ , 60 ⁇ to 90 ⁇ , 60 ⁇ to 75 ⁇ , 65 ⁇ to 75 ⁇ , or 60 ⁇ to 70 ⁇ .
- the contact of the present application may be carried out for a period of 1 minute to 12 hours, 1 minute to 6 hours, 1 minute to 3 hours, 1 minute to 1 hour, 5 minutes to 24 hours, 5 minutes to 12 hours, 5 minutes to 6 hours, 5 Min to 3 hours, 5 minutes to 1 hour, 10 minutes to 24 hours, 10 minutes to 12 hours, 10 minutes to 6 hours, 10 minutes to 3 hours, or 10 minutes to 1 hour.
- the manufacturing method of the present application may further include the step of adding Mn, Mg or Ni ions.
- the present application provides, in yet another embodiment, a method of producing a starch, maltodextrin, sucrose, or a combination thereof, and (a) an allylose-6-phosphate dephosphorylase in a phosphate; A fructose-6-phosphate 3-epimerase consisting of the amino acid sequence of SEQ ID NO: 1; Glucose-6-phosphate-isomerizing enzyme; Phosphoglucomutase or glucose phosphorylase; And ⁇ -glucan phosphorylase, starch phosphorylase, maltodextrin phosphorylase, sucrose phosphorylase, ⁇ -amylase, pullulanase, isoamylase, glucoamylase or sucrase; Or (b) contacting a microorganism expressing the enzyme of the item (a) or a culture of the microorganism.
- Example 1 fructose-6-phosphate 3- Epimerization Preparation of Recombinant Expression Vector and Transforming Microorganism Containing Genes of Enzymes
- thermophilic microorganism a thermophilic microorganism, petrophila
- recombinant expression vectors and transforming microorganisms were prepared.
- Genbank selects the gene fp3e expected to be a fructose-6-phosphate 3-epimerase based on the petrofilament gene sequences, and the amino acid sequence (SEQ ID NO: 1) and the nucleotide sequence 2 (SEQ ID NO: 3) and reverse primer (SEQ ID NO: 4) were designed and synthesized based on the information.
- Thermo was subjected to polymerase chain reaction (PCR) using a genomic DNA as a template, and plasmid vector pET24a (Novagen) for expression of E. coli was digested with restriction enzymes NdeI and XhoI.
- CJ_tp_fp3e To prepare a recombinant expression vector named CJ_tp_fp3e.
- CJ_tp_fp3e was transformed into Escherichia coli BL21 (DE3) strain by a conventional transformation method (Sambrook et al. 1989) to prepare a microorganism transformed with a recombinant vector containing the nucleotide sequence of SEQ ID NO: 2, and E. coli BL21 (DE3) / CJ_tp_fp3e.
- the strain E. coli BL21 (DE3) / CJ_tp_fp3e was deposited under the Budapest Treaty with the Korean Culture Center of Microorganisms (KCCM) on September 19, 2017, and received the deposit number KCCM12116P.
- E. coli BL21 (DE3) / CJ_tp_fp3e was inoculated into a culture tube containing 5 ml of LB liquid medium and shaken at 37 ° C until the absorbance at 600 nm reached 2.0
- the seed culture was performed in an incubator.
- the cultured medium was cultured in a culture flask containing LB liquid medium.
- 1 mM IPTG was added to induce the expression of FP3E.
- the seed culture and main culture were carried out at a stirring speed of 200 rpm and a temperature of 37.
- the culture was centrifuged at 8,000 xg for 4 to 20 minutes, and the cells were recovered.
- Cells recovered with 50 mM Tris-HCl (pH 7.0) buffer solution were washed twice, suspended in the same buffer solution, and then disrupted using an ultrasonic cell crusher.
- the cell lysate was centrifuged at 13,000 x g for 4 to 20 minutes and then only the supernatant was taken and FP3E was purified from the supernatant using His-tag affinity chromatography.
- the purified recombinant enzyme solution was dialyzed with 50 mM Tris-HCl (pH 7.0) buffer solution and used for characterization of the enzyme.
- the molecular weight was confirmed by SDS-PAGE analysis, and it was confirmed that the molecular weight of the purified FP3E was about 25 kDa (FIG. 2).
- alulose-6-phosphate phosphatase 6-phosphate was converted to alulose using phytase, and then the conversion activity was measured by whether or not alulose was produced. Specifically, after completion of the reaction, 10 units / ml of phytase was added and reacted at 37 ° C for 1 hour to dephosphorylate both the substrate fructose-6-phosphate and the product alululose-6-phosphate. The fructose and allylose were then analyzed by HPLC.
- HPLC analysis was performed using Aminex HPX-87C (Bio-rad) column at 80 ° C with water flowing at a flow rate of 0.5 ml / min to the mobile phase, and fructose and alulose were detected with a Refractive Index Detector.
- Example 4 Alulous Using substrates and enzymes required for the production pathway Alulous Manufacturing Confirmation
- fructose-6-phosphate which is a substrate of the enzyme of the present application as a starch, maltodextrin, sucrose, glucose-1-phosphate, glucose and glucose-6-phosphate.
- a starch maltodextrin
- sucrose sucrose
- glucose-1-phosphate glucose-1-phosphate
- glucose-6-phosphate sucrose
- glucose-1-phosphate glucose-1-phosphate
- glucose-6-phosphate glucose-6-phosphate
- sucrose a-glucan phosphorylase
- the prepared glucose was treated with Deinococcus geothermalis- derived heat-resistant glucose phosphorylase (SEQ ID NO: 10) and Anaerolinea thermophila- derived heat-resistant glucose oxidase (SEQ ID NO: 11) 0.0 > Thermotoga < / RTI > Neapolitana- derived phosphoglucomutase (SEQ ID NO: 12) was transformed into glucose-6-phosphate, respectively. Then, it was confirmed that fructose-6-phosphate was produced by treating heat-resistant glucose-6-phosphate-isomerase (SEQ ID NO: 13) derived from Thermotoga maritima in the glucose-6-phosphate prepared above.
- SEQ ID NO: 13 heat-resistant glucose-6-phosphate-isomerase
- FP3E of the present application was treated as described in Example 3 to produce alulose-6-phosphate, and alulose-6-phosphate was produced by using allylose-6-phosphate dephosphorylase Ross.
- aluloses could be prepared from various substrates and enzymes through the above pathway.
- Example 5 pH, temperature and metal ion addition FP3E Verify Active
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Claims (13)
- 서열번호 1의 아미노산 서열로 이루어진 과당-6-인산 3-에피머화 효소 (fructose-6-phosphate 3-epimerase).
- 제1항에 있어서, 상기 효소는 pH 5.0 내지 10.0에서 최대 활성 대비 90 내지 99.9%의 활성을 갖는 것인, 과당-6-인산 3-에피머화 효소.
- 제1항에 있어서, 상기 효소는 40℃ 내지 90℃에서 최대 활성 대비 50 내지 99.9%의 활성을 갖는 것인, 과당-6-인산 3-에피머화 효소.
- 제1항에 있어서, 상기 효소는, Mn, Mg 또는 Ni 이온의 존재 하에 활성이 증가하는 것인, 과당-6-인산 3-에피머화 효소.
- 제1항의 과당-6-인산 3-에피머화 효소를 암호화하는 핵산.
- 제5항의 핵산을 포함하는 형질전환체.
- 제1항의 과당-6-인산 3-에피머화 효소, 이를 발현하는 미생물 또는 상기 미생물의 배양물을 포함하는 알룰로스(allulose) 생산용 조성물.
- 과당-6-인산(fructose-6-phosphate)에 서열번호 1의 아미노산 서열로 이루어진 과당-6-인산 3-에피머화 효소, 이를 발현하는 미생물 또는 상기 미생물의 배양물을 접촉시켜 과당-6-인산을 알룰로스-6-인산(allulose-6-phosphate)으로 전환하는 단계를 포함하는 알룰로스 제조방법.
- 제8항에 있어서, 상기 제조방법은 pH 5.0 내지 10.0에서 수행되는 것인, 방법.
- 제8항에 있어서, 상기 제조방법은 40℃ 내지 90℃에서 수행되는 것인, 방법.
- 제8항에 있어서, Mn, Mg 또는 Ni 이온을 첨가하는 단계를 추가로 포함하는, 방법.
- 제8항 내지 제11항 중 어느 한 항에 있어서, 상기 접촉은 pH 5.0 내지 10.0, 온도 40℃ 내지 90℃, 및 1분 내지 24시간 동안 실시하는, 알룰로스 제조방법.
- 전분, 말토덱스트린, 수크로스 또는 이의 조합, 및 포스페이트에 (a) 알룰로스-6-인산 탈인산화 효소; 서열번호 1의 아미노산 서열로 이루어진 과당-6-인산 3-에피머화 효소; 포도당-6-인산 이성화효소; 포스포글루코무타아제 또는 포도당 인산화 효소; 및 α-글루칸 포스포릴라아제, 전분 포스포릴라아제, 말토덱스트린 포스포릴라아제, 수크로오스 포스포릴라아제, α-아밀라아제, 풀루란아제, 이소아밀라아제, 글루코아밀라아제 또는 수크라아제; 또는 (b) 상기 항목 (a)의 효소를 발현하는 미생물 또는 상기 미생물의 배양물을 접촉시키는 단계를 포함하는, 알룰로스 제조방법.
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WO2016191267A1 (en) * | 2015-05-22 | 2016-12-01 | Archer Daniels Midland Company | A genus of epimerase enzymes for conversion of fructose to allulose at high temperature and low ph |
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WO2017167255A1 (zh) * | 2016-04-01 | 2017-10-05 | 南京朗奈生物技术有限公司 | 一种3-差向异构酶以及编码它的多核苷酸 |
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WO2016191267A1 (en) * | 2015-05-22 | 2016-12-01 | Archer Daniels Midland Company | A genus of epimerase enzymes for conversion of fructose to allulose at high temperature and low ph |
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