WO2018182355A1 - 타가토스 생산용 조성물 및 이를 이용한 타가토스 제조방법 - Google Patents
타가토스 생산용 조성물 및 이를 이용한 타가토스 제조방법 Download PDFInfo
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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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- 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
- C12N9/10—Transferases (2.)
- C12N9/12—Transferases (2.) transferring phosphorus containing groups, e.g. kinases (2.7)
- C12N9/1205—Phosphotransferases with an alcohol group as acceptor (2.7.1), e.g. protein kinases
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- C12N9/88—Lyases (4.)
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- C12N9/00—Enzymes; Proenzymes; Compositions thereof; Processes for preparing, activating, inhibiting, separating or purifying enzymes
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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
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- C12Y—ENZYMES
- C12Y207/00—Transferases transferring phosphorus-containing groups (2.7)
- C12Y207/01—Phosphotransferases with an alcohol group as acceptor (2.7.1)
- C12Y207/01144—Tagatose-6-phosphate kinase (2.7.1.144)
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- C12Y—ENZYMES
- C12Y401/00—Carbon-carbon lyases (4.1)
- C12Y401/02—Aldehyde-lyases (4.1.2)
- C12Y401/0204—Tagatose-bisphosphate aldolase (4.1.2.40)
Definitions
- the present application relates to a composition for producing tagatose comprising a fructose-4-epimerase and a method for producing tagatose using the same.
- Tagatose is similar to sugar in foods such as milk, cheese and cacao, and natural sweeteners present in small amounts in sweet natural fruits such as apples and tangerines.
- Tagatose has a calories of 1.5 kcal / g, 1/3 of sugar, and GI (Glycemic Index) is 3, which is 5% of sugar, whereas sugar has a similar sweetness and various health functions. It can be used as an alternative sweetener that can satisfy both health and taste at the time of application.
- tagatose-6-phosphate kinase (EC 2.7.1.144) is the ATP and D-tagatose 6-phosphate (D-tagatose 6-phosphate) as shown in Scheme 1 below. It is known to produce ADP and D-tagatose 1,6-biphosphate as a substrate, but the tagatose-6-phosphate kinase is used to produce fructose (D-fructose). There is no report on the activity of converting to.
- tagatose-6-phosphate kinase (EC 2.7.1.144) was used to tag fructose. By confirming that there is activity to convert to toss, the present application was completed.
- One object of the present application is to provide a composition useful for preparing tagatose, the composition comprising tagatose-6-phosphate kinase, a microorganism expressing the enzyme or a culture of the microorganism.
- Another object of the present application is to prepare a method for producing tagatose comprising the step of converting fructose to tagatose by contacting fructose-4-epimerase, the microorganism expressing the enzyme or a culture of the microorganism with fructose.
- the expression cassette may be in the form of an expression vector capable of self replication.
- the gene may be introduced into the host cell in its own form or in the form of a polynucleotide structure, and may be operably linked to a sequence required for expression in the host cell.
- the microorganism of the present application may include both prokaryotic and eukaryotic microorganisms, as long as the microorganism capable of producing the fructose-4-epimerase of the present application, including the nucleic acid of the present application or the recombinant vector of the present application.
- S. genus Escherichia Escherichia
- An air Winiah Erwinia
- Serratia marcescens Serratia
- Providencia Providencia
- Corynebacterium Corynebacterium
- Brevibacterium Brevibacterium
- It may include a microorganism strain belonging to, specifically, E.
- Corynebacterium corynebacterium glutamicum Corynebacterium corynebacterium glutamicum
- Examples of such microorganisms are E. coli BL21 (DE3) / CJ_ANT_F4E, E. coli BL21 (DE3) / CJ_AB_F4E, E. coli BL21 (DE3) / CJ_DT_F4E .
- the microorganism of the present application may include all microorganisms capable of expressing the fructose-4-epimerase enzyme of the present application by various known methods in addition to introducing the nucleic acid or the vector.
- the culture of the microorganism of the present application may be prepared by culturing the microorganism expressing the tagatose-6-phosphate kinase of the present application in a medium.
- the term "culture” means growing the microorganisms under appropriately controlled environmental conditions. Cultivation process of the present application can be made according to the appropriate medium and culture conditions known in the art. This culture process can be easily adjusted and used by those skilled in the art according to the strain selected.
- the step of culturing the microorganism is not particularly limited thereto, but may be performed by a known batch culture method, continuous culture method, fed-batch culture method, or the like.
- the culture conditions are not particularly limited, but using a basic compound (eg sodium hydroxide, potassium hydroxide or ammonia) or an acidic compound (eg phosphoric acid or sulfuric acid) to an appropriate pH (eg pH 5 to 9, specifically PH 7 to 9) can be adjusted.
- a basic compound eg sodium hydroxide, potassium hydroxide or ammonia
- an acidic compound eg phosphoric acid or sulfuric acid
- antifoaming agents such as fatty acid polyglycol esters can be used to suppress bubble formation, and in order to maintain the aerobic state of the culture, oxygen or oxygen-containing gas is injected into the culture, or anaerobic and microaerobic conditions are maintained. To maintain, it can be injected with no gas or with nitrogen, hydrogen or carbon dioxide gas.
- the culture temperature may be maintained at 25 °C to 40 °C, specifically 30 °C to 37 °C, but is not limited thereto.
- the incubation period may continue until the desired amount of useful material is obtained, specifically, may be incubated for about 0.5 hours to 60 hours, but is not limited thereto.
- the culture medium used may include sugars and carbohydrates (e.g.
- fats and fats e.g. soybean oil, sunflower seeds
- Oils, peanut oils and coconut oils fatty acids (e.g. palmitic acid, stearic acid and linoleic acid), alcohols (e.g. glycerol and ethanol) and organic acids (e.g. acetic acid) may be used individually or in combination. This is not restrictive.
- Nitrogen sources include nitrogen-containing organic compounds such as peptone, yeast extract, gravy, malt extract, corn steep liquor, soybean meal and urea, or inorganic compounds such as ammonium sulfate, ammonium chloride, ammonium phosphate, ammonium carbonate and Ammonium nitrate) and the like can be used individually or in combination, but is not limited thereto.
- a source of phosphorus potassium dihydrogen phosphate, dipotassium hydrogen phosphate, a corresponding sodium-containing salt, and the like may be used individually or in combination, but is not limited thereto.
- the medium may also contain essential growth-promoting substances such as other metal salts (eg magnesium sulfate or iron sulfate), amino acids and vitamins.
- composition for producing tagatose of the present application may further include fructose.
- composition for producing tagatose of the present application includes a tagatose-6-phosphate kinase having a fructose-4-epimerization activity for directly converting fructose to tagatose, a microorganism expressing the same or a culture of the microorganism, It may be characterized by not including other enzymes other than phosphorus fructose.
- ⁇ -glucan phosphorylase for example, ⁇ -glucan phosphorylase, starch phosphorylase, maltodextrin phosphorylase or sucrose phosphorylase, expressing it Microorganisms or cultures of the microorganisms;
- Glucose glucokinase a microorganism expressing the same or a culture of the microorganism
- Tagatose-6-phosphate dephosphorylase a microorganism expressing the same or a culture of the microorganism; And / or
- ⁇ -amylase pullulanase, glucoamylase, sucrase or isoamylase
- Microorganisms expressing the amylase, pullulanase, glucoamylase, sucrase or isoamylase Or it may be characterized in that it does not comprise a culture of microorganisms expressing the amylase, pullulanase, glucoamylase, sukrase or isoamylase.
- composition for producing tagatose of the present application may further include any suitable excipient commonly used in the composition for producing tagatose.
- excipients may be, for example, but not limited to, preservatives, wetting agents, dispersants, suspending agents, buffers, stabilizers or isotonic agents.
- the composition for producing tagatose of the present application may further include a metal.
- the metal of the present application may be a metal comprising a divalent cation.
- the metal of the present application may be magnesium, nickel, or manganese (Mn). More specifically, the metal of the present application may be a metal ion or a metal salt, and even more specifically the metal salt may be MgCl 2 , MgSO 4 , NiSO 4 , NiCl 2 , MnCl 2 or MnSO 4 .
- the present application provides a method for converting fructose to tagatose by contacting fructose (D-fructose) with a fructose-4-epimerase of the present application, a microorganism expressing the enzyme or a culture of the microorganism. It provides a tagatose manufacturing method comprising.
- the contacting may be performed at pH 5.0 to pH 9.0, the temperature is 30 °C to 80 °C temperature conditions, and / or 0.5 hours to 48 hours.
- the contact of the present application may be performed at pH 6.0 to pH 9.0 conditions or pH 7.0 to pH 9.0 conditions.
- the contact of the present application is 35 °C to 80 °C, 40 °C to 80 °C, 45 °C to 80 °C, 50 °C to 80 °C, 55 °C to 80 °C, 60 °C to 80 °C, 30 °C to 70 °C, 35 ° C to 70 ° C, 40 ° C to 70 ° C, 45 ° C to 70 ° C, 50 ° C to 70 ° C, 55 ° C to 70 ° C, 60 ° C to 70 ° C, 30 ° C to 65 ° C, 35 ° C to 65 ° C, 40 ° C to 65 degreeC, 45 degreeC-65 degreeC, 50 degreeC-65 degreeC, 55 degreeC-65 degreeC, 30 degreeC-60 degreeC, 35 degreeC-60 degreeC, 40 degreeC-60 degreeC, 45 degreeC-60 degreeC, 50 degreeC
- the contact of the present application is 0.5 hours to 36 hours, 0.5 hours to 24 hours, 0.5 hours to 12 hours, 0.5 hours to 6 hours, 1 hour to 48 hours, 1 hour to 36 hours, 1 3 hours to 24 hours, 3 hours to 24 hours, 3 hours to 24 hours, 3 hours to 12 hours, 3 hours to 1 hour to 12 hours, 1 hour to 6 hours, 3 hours to 36 hours
- the contact of the present application may be performed in the presence of a metal.
- the fructose-4-epimerase enzyme, the microorganism expressing the enzyme, the culture of the microorganism, the metal, the metal ion and the metal salt are as described above in another embodiment.
- the manufacturing method of the present application may further comprise the step of separating and / or purifying the produced tagatose.
- the separation and / or purification may use methods commonly used in the art of the present application, and non-limiting examples may use dialysis, precipitation, adsorption, electrophoresis, ion exchange chromatography and fractional crystallization.
- the purification may be carried out in only one method, or may be performed in combination of two or more methods.
- the preparation method of the present application may further comprise the step of performing decolorization and / or desalting before or after the step of separating and / or purifying.
- decolorization and / or desalting By performing the above-mentioned decolorization and / or desalting, tagatose of superior quality can be obtained.
- the preparation method of the present application may further comprise the step of converting to tagatose, separating and / or purifying the present application, or crystallizing the tagatose after the decolorizing and / or desalting step.
- the crystallization can be carried out using a conventionally used crystallization method.
- crystallization may be performed using a cooling crystallization method.
- the preparation method of the present application may further comprise the step of concentrating tagatose before the step of crystallizing.
- the concentration can increase the crystallization efficiency.
- the preparation method of the present application comprises contacting the unreacted fructose with an enzyme of the present application, a microorganism expressing the enzyme or a culture of the microorganism after the separation and / or purification of the present application.
- the step of crystallizing the application may further comprise reusing the separated mother liquor into the separation and / or purification steps, or a combination thereof.
- the fructose-4-epimerase of the present application is excellent in heat resistance, industrially capable of producing tagatose, and converts the common sugar fructose into tagatose at a high yield, thereby having a high economic effect.
- Figure 1 shows the result of analyzing the molecular weight of the tagatose-6-phosphate kinase (CJ_ANT_F4E) generated and isolated in the transformant according to an embodiment of the present application by protein electrophoresis (SDS-PAGE).
- CJ_ANT_F4E tagatose-6-phosphate kinase
- FIG. 2 is an HPLC chromatography result showing that tagatose-6-phosphate kinase (CJ_ANT_F4E) prepared in one example of the present application has fructose-4-epimerase activity.
- CJ_ANT_F4E tagatose-6-phosphate kinase
- CJ_ANT_F4E tagatose-6-phosphate kinase
- FIG. 4 is an HPLC chromatography graph showing that the tagatose-6-phosphate kinase enzyme CJ_AB_F4E prepared in one embodiment of the present application has fructose-4-epimerase activity.
- Figure 5 is a graph showing the fructose-4-epimerization activity according to the temperature change of the tagatose-6-phosphate kinase enzyme CJ_AB_F4E prepared in one embodiment of the present application.
- FIG. 7 is an HPLC chromatography graph showing that the tagatose-6-phosphate kinase enzyme CJ_DT_F4E prepared in one example of the present application exhibits fructose-4-epimerase activity.
- FIG. 9 is a graph showing the fructose-4-epimerization activity according to the metal addition of the tagatose-6-phosphate kinase enzyme CJ_DT_F4E prepared in one embodiment of the present application.
- CJ_ANTA_F4E tagatose-6-phosphate kinase
- FIG. 11 is an HPLC chromatographic result showing that tagatose-6-phosphate kinase (CJ_TH_F4E) prepared in one example of the present application has fructose-4-epimerase activity.
- CJ_TH_F4E tagatose-6-phosphate kinase
- CJ_TAI_F4E tagatose-6-phosphate kinase
- Example 1 Preparation of tagatose-6-phosphate kinase and its activity evaluation
- Example 1-1 Preparation of Recombinant Expression Vectors and Transformants Containing Tagatose-6-Phosphate Kinase Gene
- thermophiles Two Anaerolinea Thermophiles to Provide New Heat-resistant Fructose-4- Epimerase Tagatose-6-phosphate kinase gene information derived from thermophile ) was obtained to prepare E. coli-expressable vectors and transformed microorganisms (transformants).
- a tagatose-6-phosphate kinase gene sequence was selected for anerolinia thermophilia gene sequences registered in Kyoto Encyclopedia of Genes and Genomes (KEGG), and the amino acid sequence of anerolinia thermophilia (SEQ ID NO: 1).
- a recombinant expression vector prepared by inserting into pBT7-C-His which is an E. coli expression vector, based on the nucleotide sequence (SEQ ID NO: 2) and the amino acid sequence (SEQ ID NO: 7) and the nucleotide sequence (SEQ ID NO: 8) Requested.
- PCR conditions were at 94 ° C using primer 1: ATATACATATGATGTTCGGCTCGCCTGCTCCCCTGCTG (SEQ ID NO: 13) and primer 2: TGGTGCTCGAGCCCGCACGCCGCAGCGTAATCTTCCAG (SEQ ID NO: 14).
- primer 1 ATATACATATGATGTTCGGCTCGCCTGCTCCCCTGCTG
- primer 2 TGGTGCTCGAGCCCGCACGCCGCAGCGTAATCTTCCAG
- E. coli BL21 (DE3) / CJ_ANT_F4E and E. coli BL21 (DE3) / CJ_ANTA_F4E were transformed into E. coli BL21 (DE3). Under the Budapest Treaty . E. coli BL21 (DE3) / CJ_ANT_F4E was deposited on March 20, 2017 under accession number KCCM11996P, and E. coli BL21 (DE3) / CJ_ANTA_F4E was deposited on March 23, 2018 under accession number KCCM12232P.
- the spawn culture was inoculated into a culture flask containing LB (Lysogeny broth) and a liquid medium containing lactose, a protein expression regulator, to carry out the main culture.
- the stirring speed during the culture process is 180rpm, the culture temperature was maintained at 37 °C.
- the culture solution was centrifuged for 20 minutes at 4 °C at 8,000rpm to recover the cells.
- the recovered cells were washed twice with 50 mM Tris-HCl (pH 8.0) buffer and resuspended in 50 mM NaH 2 PO 4 (pH 8.0) buffer containing 10 mM imidazole and 300 mM NaCl.
- the suspended cells were lysed using a sonicator, and the cell lysates were collected only after centrifugation at 4 ° C. for 20 minutes at 13,000 rpm.
- the supernatant was purified using His-taq affinity chromatography, and 50 mM NaH 2 PO 4 (pH 8.0) buffer containing 20 mM imidazole and 300 mM NaCl was flowed at 10 times the amount of filler to remove nonspecific bindable protein. 50mM NaH2PO4 (pH8.0) buffer containing the final 250mM imidazole and 300mM NaCl was eluted and purified, followed by dialysis with 50mM Tris-HCl (pH 8.0) buffer and two enzymes for enzyme characterization (CJ_ANT_F4E, CJ_ANTA_F4E) is secured. As a result, the purified recombinant fructose-4-epimerase confirmed that CJ_ANT_F4E was about 47 kDa through SDS-PAGE analysis (FIG. 1).
- Example 1-2 In order to measure the activity of the enzymes obtained in Example 1-2, 30% by weight fructose was used, where 50 mM Tris-HCl (pH 8.0), 1 mM CoSO 4 , 20 mg / s isolated from Example 1-2 The reaction was carried out at 60 ° C. for 2 hours by adding ml purified enzyme.
- Fructose-4-epimerase CJ_ANT_F4E, CJ_ANTA_F4E As a result of checking the concentration of tagatose and the conversion rate from fructose to tagatose, the conversion rate of CJ_ANT_F4E is 16.1%, and the conversion rate of CJ_ANTA_F4E is 21.9%.
- Conversion Tagatose Production / Fructose Substrate Concentration X 100
- tagatose, a fructose and a product remaining after the reaction was quantified using HPLC.
- the column used was Shodex Sugar SP0810, the column temperature was 80 °C, the flow rate of the water of the mobile phase was flowed at 1ml / min. 2 and 10 were used to detect and quantify peaks representing the reaction of the enzyme with fructose as a substrate.
- Example 1-4 fructose-4- Epimerization Effect of temperature on activity
- Example 2 Preparation of tagatose-6-phosphate kinase and evaluation of its activity
- Example 2-1 Preparation of Recombinant Expression Vectors and Transformants Containing Tagatose-6-Phosphate Kinase Gene
- the present inventors obtained the tagatose-6-phosphate kinase gene information from Anaerolineae bacterium Taxon ID: 2654588098 to prepare E. coli-expressable recombinant vectors and transformed microorganisms.
- the tagatose-6-phosphate kinase gene sequence is selected from uneroline bacterium gene sequences registered in Kyoto Encyclopedia of Genes and Genomes (KEGG) and European Nucleotide Archives (ENA). Based on the amino acid sequence (SEQ ID NO: 3) and nucleotide sequence (SEQ ID NO: 4) information of the L. bacterium-derived tagatose-6-phosphate kinase CJ_AB_F4E, E. coli-expressing recombinant expression vector pBT7-C including the base sequence of the enzyme -His-CJ_AB_F4E was manufactured (Bionia, South Korea).
- Each recombinant vector was transformed into Escherichia coli BL21 (DE3) by heat shock transformation (Sambrook and Russell: Molecular cloning, 2001), and then stored in 50% glycerol and frozen.
- the transgenic strain was named E. coli BL21 (DE3) / CJ_AB_F4E, and was deposited on August 11, 2017 at the Korean Culture Center of Microorganisms (KCCM), an international depository organization under the Budapest Treaty, and deposited accession number KCCM12093P. Was granted.
- each of the transformed microorganisms includes an ampicillin antibiotic.
- the inoculation was inoculated into a culture tube containing 5 mL of the prepared LB liquid medium, and the seed culture was carried out in a 37 ° C. shaker incubator until the absorbance was 2.0 at 600 nm.
- the seed cultured culture was inoculated into a culture flask containing a liquid medium containing LB and lactose, a protein expression regulator, to carry out the main culture.
- the seed culture and main culture were carried out at a stirring speed of 180 rpm and 37 °C conditions. Subsequently, the culture solution was centrifuged at 4 ° C. at 8,000 rpm for 20 minutes to recover the cells. The recovered cells were washed twice with 50 mM Tris-HCl (pH 8.0) buffer and reproduced in 50 mM NaH 2 PO 4 (pH 8.0) buffer containing 10 mM imidazole and 300 mM NaCl. It was cloudy. The resuspended cells were disrupted using a sonicator, and the cell debris was centrifuged at 4 ° C. at 13,000 rpm for 20 minutes, and only the supernatant was taken.
- the supernatant was purified using His-taq affinity chromatography, followed by flowing 50 mM NaH 2 PO 4 (pH 8.0) buffer containing 20 mM imidazole and 300 mM NaCl in 10 times the amount of the filler to make it nonspecific. The bindable protein was removed. Next, 50 mM NaH 2 PO 4 (pH8.0) buffer containing 250 mM imidazole and 300 mM NaCl was further eluted to purify and purified by dialysis with 50 mM Tris-HCl (pH 8.0) buffer solution. Purified enzyme CJ_AB_F4E was obtained for analysis.
- Example 2-4 Confirmation of activity according to temperature change of recombinant enzyme
- the CJ_AB_F4E enzyme showed maximum activity at 65 ° C., and it was confirmed that CJ_AB_F4E maintained at least 50% of the maximum activity at 50 ° C. to 70 ° C. (FIG. 5).
- CJ_AB_F4E 2 mg / mL of CJ_AB_F4E is added to 50 mM Tris HCl (pH 8.0) buffer containing 10% by weight fructose, and various metal ions NiSO 4 , CaCl 2 , ZnSO 4 , MgSO 4 , MnSO 4 , FeSO 4 , CuSO 4 , or (NH 4 ) 2 SO 4 was added 1 mM each to measure the enzyme activity. The case where no metal ion was treated was set as a control. After the reaction was completed, tagatose in the reaction solution was quantitatively analyzed using HPLC.
- the CJ_AB_F4E enzyme was found to increase in activity by the addition of MnSO 4 or NiSO 4 , indicating that there is a requirement for metal ions such as manganese ions and nickel ions. In particular, it was confirmed that the maximum activity when added NiSO 4 (Fig. 6).
- Example 3 Preparation of tagatose-6-phosphate kinase and its activity evaluation
- Example 3-1 Preparation of Recombinant Expression Vectors and Transformants Containing Tagatose-6-Phosphate Kinase Gene
- the tagatose-6-phosphate kinase gene sequence is selected from the dioctoglomus thermophilum gene sequence registered in Kyoto Encyclopedia of Genes and Genomes (KEGG) to derive the dioctomoglomus thermophilum.
- KEGG Kyoto Encyclopedia of Genes and Genomes
- amino acid sequence SEQ ID NO: 5
- nucleotide sequence SEQ ID NO: 6
- a recombinant expression vector pBT7-C-His-CJ_DT_F4E capable of expressing E. coli, including the nucleotide sequence of the enzyme, was prepared. Synthesized (Bionia, Korea).
- Each recombinant vector was transformed into E. coli BL21 (DE3) by heat shock transformation (Sambrook and Russell: Molecular cloning, 2001) to produce a recombinant microorganism, and then used by freezing stored in 50% glycerol.
- the recombinant microorganism was named E. coli BL21 (DE3) / CJ_DT_F4E, and was deposited on September 13, 2017 at the Korea Culture Center of Microorganisms (KCCM), an international depository organization under the Budapest Treaty, and deposited accession number KCCM12109P. Granted.
- each transformed microorganism was 5 mL of LB liquid medium containing an ampicillin antibiotic. Inoculated into the culture tube containing, and the seed culture was carried out in a 37 °C shaking incubator until the absorbance at 2.0 nm 600. The seed cultured culture was inoculated into a culture flask containing a liquid medium containing LB and lactose, a protein expression regulator, to carry out the main culture. The seed culture and main culture were carried out at a stirring speed of 180 rpm and 37 °C conditions.
- the culture medium was recovered after centrifugation at 4 ° C. for 20 minutes at 8,000 rpm.
- the recovered cells were washed twice with 50 mM Tris-HCl (pH 8.0) buffer and suspended in 50 mM NaH 2 PO 4 (pH 8.0) buffer containing 10 mM imidazole and 300 mM NaCl. It was.
- the suspended cells were disrupted by using a sonicator, and the cell lysate was centrifuged at 4 ° C. at 13,000 rpm for 20 minutes, and only the supernatant was taken.
- the supernatant was purified using His-taq affinity chromatography, followed by flowing 50 mM NaH 2 PO 4 (pH 8.0) buffer containing 20 mM imidazole and 300 mM NaCl in 10 times the amount of the filler to make it nonspecific. The bindable protein was removed. Thereafter, 50 mM NaH 2 PO 4 (pH 8.0) buffer containing 250 mM imidazole and 300 mM NaCl was further eluted and purified. Purified enzyme CJ_DT_F4E for characterization was obtained.
- Example 3- 3 recombination Evaluation of the Conversion Activity of Enzyme Fructose to Tagatose
- Tagatose the fructose and product remaining after the reaction, was quantified using HPLC.
- HPLC analysis was performed using Shodex Sugar SP0810 column, the column temperature was 80 °C, the flow rate of the water of the mobile phase was flowed at 1 mL / min (Fig. 7).
- Example 3-4 Confirmation of activity of recombinant enzyme according to temperature
- CJ_DT_F4E showed the maximum activity at 60 °C, it was confirmed that at least 80% of the maximum activity at 50 °C to 70 °C, maintaining at least 95% of the maximum activity at 55 °C to 70 °C (Table 1 and Figure 8).
- CJ_DT_F4E 5 mg / mL of CJ_DT_F4E was added to 50 mM Tris HCl (pH 8.0) buffer containing 5% by weight fructose, and metal ions MgSO 4 and MnSO 4 were added in 1 mM portions to measure enzyme activity. . The case where no metal ion was treated was set as a control (w / o). Tagatose in the reaction complete solution was quantitatively analyzed using HPLC.
- CJ_DT_F4E was increased by the addition of MnSO 4 and MgSO 4 so that manganese or magnesium ions (or salts thereof) could increase the fructose-4-epimerization activity of CJ_DT_F4E (FIG. 9).
- CJ_DT_F4E was confirmed to increase the activity more than 2.5 times compared to the control group as a result of adding MnSO 4 (Fig. 9).
- Example 4-1 Preparation of Recombinant Expression Vectors and Transformants Containing Tagatose-6-Phosphate Kinase Gene
- a tagatose-6-phosphate kinase gene sequence is selected from a thermobipida halotolelans gene sequence registered in Kyoto Encyclopedia of Genes and Genomes (KEGG), and a tagatose-6 derived from thermobipida halotolelans is selected.
- KEGG Kyoto Encyclopedia of Genes and Genomes
- a tagatose-6 derived from thermobipida halotolelans is selected.
- amino acid sequence SEQ ID NO: 9
- nucleotide sequence SEQ ID NO: 10
- a recombinant expression vector pBT7-C-His-CJ_TH_F4E capable of expressing E. coli, including the nucleotide sequence of the enzyme, was synthesized. Bioneer, Korea).
- Each recombinant vector was transformed into E. coli BL21 (DE3) by heat shock transformation (Sambrook and Russell: Molecular cloning, 2001) to produce a recombinant microorganism, and then used by freezing stored in 50% glycerol.
- the recombinant microorganism was named E. coli BL21 (DE3) / CJ_TH_F4E, and was deposited on March 23, 2018 to the Korean Culture Center of Microorganisms (KCCM), an international depository organization under the Budapest Treaty, and deposited accession number KCCM12235P. Granted.
- each transformed microorganism was 5 mL of LB liquid medium containing an ampicillin antibiotic. Inoculated into the culture tube containing, and the seed culture was carried out in a 37 °C shaking incubator until the absorbance at 2.0 nm 600. The seed cultured culture was inoculated into a culture flask containing a liquid medium containing LB and lactose, a protein expression regulator, to carry out the main culture. The seed culture and main culture were carried out at a stirring speed of 180 rpm and 37 °C conditions.
- the culture medium was recovered after centrifugation at 4 ° C. for 20 minutes at 8,000 rpm.
- the recovered cells were washed twice with 50 mM Tris-HCl (pH 8.0) buffer and suspended in 50 mM NaH 2 PO 4 (pH 8.0) buffer containing 10 mM imidazole and 300 mM NaCl. It was.
- the suspended cells were disrupted using a sonicator, and the cell debris was centrifuged at 4 ° C. at 13,000 rpm for 20 minutes, and only the supernatant was taken.
- the supernatant was purified using His-taq affinity chromatography, followed by flowing 50 mM NaH 2 PO 4 (pH 8.0) buffer containing 20 mM imidazole and 300 mM NaCl in 10 times the amount of the filler to make it nonspecific. The bindable protein was removed. Thereafter, 50 mM NaH 2 PO 4 (pH 8.0) buffer containing 250 mM imidazole and 300 mM NaCl was further eluted and purified. The enzyme was purified by dialysis with 50 mM Tris-HCl (pH 8.0) buffer. Purified enzyme CJ_TH_F4E for characterization was obtained.
- Tagatose the fructose and product remaining after the reaction, was quantified using HPLC.
- HPLC analysis was performed using Shodex Sugar SP0810 column, the column temperature was 80 °C, the flow rate of the water of the mobile phase was flowed at 1 mL / min (Fig. 11).
- Example 5 Preparation of tagatose-6-phosphate kinase and evaluation of its activity
- Example 5-1 Preparation of Recombinant Expression Vectors and Transformants Containing Tagatose-6-Phosphate Kinase Gene
- a tagatose-6-phosphate kinase gene sequence is selected from a ThermoErobacter indigenous gene sequence registered in Kyoto Encyclopedia of Genes and Genomes (KEGG), and a tagatose derived from Thermoerobacter indiencesis is selected.
- KEGG Kyoto Encyclopedia of Genes and Genomes
- SEQ ID NO: 11 amino acid sequence
- SEQ ID NO: 12 nucleotide sequence
- Each recombinant vector was transformed into E. coli BL21 (DE3) by heat shock transformation (Sambrook and Russell: Molecular cloning, 2001) to produce a recombinant microorganism, and then used by freezing stored in 50% glycerol.
- the recombinant microorganism was named E. coli BL21 (DE3) / CJ_TAI_F4E, and was deposited on March 23, 2018 to the Korean Culture Center of Microorganisms (KCCM), an international depository organization under the Budapest Treaty. Granted.
- each transformed microorganism was 5 mL of LB liquid medium containing an ampicillin antibiotic. Inoculated into the culture tube containing, and the seed culture was carried out in a 37 °C shaking incubator until the absorbance at 2.0 nm 600. The seed cultured culture was inoculated into a culture flask containing a liquid medium containing LB and lactose, a protein expression regulator, to carry out the main culture. The seed culture and main culture were carried out at a stirring speed of 180 rpm and 37 °C conditions.
- the culture medium was recovered after centrifugation at 4 ° C. for 20 minutes at 8,000 rpm.
- the recovered cells were washed twice with 50 mM Tris-HCl (pH 8.0) buffer and suspended in 50 mM NaH 2 PO 4 (pH 8.0) buffer containing 10 mM imidazole and 300 mM NaCl. It was.
- the suspended cells were disrupted using a sonicator, and the cell debris was centrifuged at 4 ° C. at 13,000 rpm for 20 minutes, and only the supernatant was taken.
- the supernatant was purified using His-taq affinity chromatography, followed by flowing 50 mM NaH 2 PO 4 (pH 8.0) buffer containing 20 mM imidazole and 300 mM NaCl in 10 times the amount of the filler to make it nonspecific. The bindable protein was removed. Thereafter, 50 mM NaH 2 PO 4 (pH 8.0) buffer containing 250 mM imidazole and 300 mM NaCl was further eluted and purified, and then purified by dialysis with 50 mM Tris-HCl (pH 8.0) buffer solution. Purified enzyme CJ_TAI_F4E for characterization was obtained.
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Abstract
Description
Claims (6)
- 타가토스-6-인산 키나아제, 이를 발현하는 미생물 또는 상기 미생물의 배양물을 포함하는 타가토스 생산용 조성물.
- 제1항에 있어서, 상기 조성물은 과당을 추가로 포함하는, 타가토스 생산용조성물.
- 제1항에 있어서, 상기 조성물은 서열번호 1, 3, 5, 7, 9, 또는 11의 아미노산 서열로 이루어진 타가토스-6-인산 키나아제를 하나 이상 포함하는 것인, 타가토스 생산용 조성물.
- 제1항에 있어서, 상기 타가토스-6-인산 키나아제는 언에어로리네 속(Anaerolineae sp.), 써모비피다 속(The genus of Thermobifida), 써모언에로박터 속(The genus of Thermoanaerobacter), 딕티오글로무스 속(The genus of Dictyoglomus) 유래 효소, 또는 그 변이체인, 타가토스 생산용 조성물.
- 과당을, 타가토스-6-인산 키나아제, 이를 발현하는 미생물 또는 상기 미생물의 배양물과 접촉시켜, 상기 과당을 타가토스로 전환시키는 단계를 포함하는 타가토스의 제조 방법.
- 제5항에 있어서, 상기 접촉은 pH 5.0 내지 pH 9.0 조건에서, 30℃ 내지 80℃ 온도 조건에서, 또는 0.5시간 내지 48시간 동안 수행하는, 타가토스 제조방법.
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JP2019552866A JP6961713B2 (ja) | 2017-03-31 | 2018-03-30 | タガトース生産用組成物及びこれを用いたタガトースの製造方法 |
BR112019020338-9A BR112019020338B1 (pt) | 2017-03-31 | 2018-03-30 | Método de produção de tagatose |
CN201880036242.2A CN111133103B (zh) | 2017-03-31 | 2018-03-30 | 用于制备塔格糖的组合物和利用其制备塔格糖的方法 |
MX2019011730A MX2019011730A (es) | 2017-03-31 | 2018-03-30 | Composicion para producir tagatosa y procedimiento de produccion de tagatosa usando la misma. |
EP18777328.8A EP3604516A4 (en) | 2017-03-31 | 2018-03-30 | COMPOSITION FOR THE PRODUCTION OF TAGATOSE AND PROCESS FOR THE PRODUCTION OF TAGATOSE USING IT |
CA3057595A CA3057595A1 (en) | 2017-03-31 | 2018-03-30 | Composition for producing tagatose and method of producing tagatose using the same |
US16/582,629 US11408017B2 (en) | 2017-03-31 | 2019-09-25 | Composition for producing tagatose and method of producing tagatose using the same |
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CN (1) | CN111133103B (ko) |
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JP2021506228A (ja) * | 2017-11-02 | 2021-02-22 | 中国科学院天津工業生物技術研究所 | 新規なタガトース6−リン酸4−エピメラーゼ及びその応用 |
WO2022095684A1 (zh) * | 2020-11-05 | 2022-05-12 | 中国科学院天津工业生物技术研究所 | 重组微生物、其制备方法及在生产塔格糖中的应用 |
US20220372534A1 (en) * | 2018-10-19 | 2022-11-24 | Cj Cheiljedang Corporation | Novel fructose-4-epimerase and method for preparing tagatose using same |
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KR20180111667A (ko) | 2017-03-31 | 2018-10-11 | 씨제이제일제당 (주) | 타가토스 생산용 조성물 및 이를 이용한 타가토스 제조방법 |
KR102219195B1 (ko) * | 2019-08-14 | 2021-02-24 | 씨제이제일제당 주식회사 | 신규 과당-4-에피머화 효소 및 이를 이용한 타가토스의 제조 방법 |
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WO2022095684A1 (zh) * | 2020-11-05 | 2022-05-12 | 中国科学院天津工业生物技术研究所 | 重组微生物、其制备方法及在生产塔格糖中的应用 |
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KR20180111679A (ko) | 2018-10-11 |
TWI704227B (zh) | 2020-09-11 |
US20200087689A1 (en) | 2020-03-19 |
CN111133103A (zh) | 2020-05-08 |
TW201842187A (zh) | 2018-12-01 |
US11408017B2 (en) | 2022-08-09 |
CN111133103B (zh) | 2024-03-08 |
BR112019020338A2 (pt) | 2020-04-28 |
EP3604516A1 (en) | 2020-02-05 |
BR112019020338A8 (pt) | 2023-04-04 |
BR112019020338B1 (pt) | 2023-05-02 |
JP2020511974A (ja) | 2020-04-23 |
KR102076288B1 (ko) | 2020-02-10 |
CA3057595A1 (en) | 2018-10-04 |
JP6961713B2 (ja) | 2021-11-05 |
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