Disclosed are a composition for production of ginsenoside compound K using a high temperature-β-glycosidase and a high temperature-α-L-arabinofuranosidase, and a method for preparing ginsenoside compound K.
Ginsenoside compound K (20(S)-protopanaxadiol-20-O-β-D-glucopyranoside; see the following Formula 1) is an intestinal bacterial metabolite of ginseng saponin components. It is produced by hydrolysis of glucose, arabinopyranose and arabinofuranose moieties in ginsenoside Rb1, ginsenoside Rb2, ginsenoside Rc and ginsenoside Rd, which are protopanaxadiol-type saponins.
Until now, ginsenoside compound K has been known to have many excellent effects such as immunity enhancement, inhibition of tumor angiogenesis, inhibition of cancer cell infiltration and inhibition of cancer cell proliferation. Accordingly, there is an increasing demand for mass supply of the compound in the field of health foods and cosmetics. Therefore, there is a growing need for producing it stably and efficiently.
The prior art for production of ginsenoside compound K includes methods for preparing compound K by treating diol-type saponins with enzymes such as β-glycosidase (Korean Patent Laid-Open No. 2003-94757), cellulase isolated from a microorganism of the genus Penicillium or β-galactosidase isolated from the genus Aspergillus (Korean Patent No. 377546), naringinase isolated from the genus Penicillium, or pectinase isolated from the genus Aspergillus (Korean Patent No. 418604), etc.
As described above, ginsenoside compound K is mostly produced using mesophilic enzymes active at a temperature in the range of 10 to 50° C. However, since these enzymes act at a low reaction temperature, they are likely to be contaminated with microorganisms and have a low production yield.
In some cases, ginsenoside compound K is produced using high temperature enzymes. However, α-L-arabinofuranosidase shows poor expression and activity, and thus has difficulty in converting ginsenoside Rc to compound K.
Therefore, in order to solve these problems, there is an urgent need to develop enzymes industrially useful for production of ginsenoside compound K and a preparation method using the same.
Thus, the present inventors have continuously studied to develop a new method for preparing ginsenoside compound K. An object of the present invention is to provide a composition for production of ginsenoside compound K comprising a high temperature-β-glycosidase derived from a high temperature microorganism, Sulfolobus solfataricus, and an α-L-arabinofuranosidase derived from Thermotoga petrophila and a method for producing ginsenoside compound K using the same.
In one aspect of the present invention, these enzymes are cloned from the high temperature microorganisms to produce recombinant expression vectors and microorganisms transformed with the same. Then, a high temperature-β-glycosidase and a high temperature-α-L-arabinofuranosidase are produced by enhancing the expression of an α-L-arabinofuranosidase derived from Thermotoga petrophila, which had a low expression level, and the optimum ratio of these two enzymes are determined. The present inventors have found that when the resultant is reacted with red ginseng extract, a large quantity of ginsenoside compound K is produced in a short time, resulting in a high yield, and thereby completed the present invention. Thus, an object of the present invention is to provide a composition for production of ginsenoside compound K comprising a high temperature-β-glycosidase and a high temperature-α-L-arabinofuranosidase.
In another aspect, an object of the present invention is to provide a preparation method for converting all the protopanaxadiol-type ginsenosides in red ginseng extract into ginsenoside compound K by using a high temperature-β-glycosidase and a high temperature-α-L-arabinofuranosidase.
In one aspect, the present invention provides a composition for production of ginsenoside compound K comprising a high temperature-β-glycosidase and a high temperature-α-L-arabinofuranosidase.
In one aspect, the present invention may provide the use of a high temperature-β-glycosidase and a high temperature-α-L-arabinofuranosidase for production of ginsenoside compound K.
In one aspect of the present invention, the high temperature-β-glycosidase may be a β-glycosidase of Sulfolobus solfataricus, and the high temperature-αL-arabinofuranosidase may be an α-L-arabinofuranosidase of Thermotoga petrophila.
In one aspect of the present invention, the content of the high temperature-α-L-arabinofuranosidase may be 1 part by weight or more based on 100 parts by weight of the high temperature-β-glycosidase.
In one aspect of the present invention, the high temperature-α-L-arabinofuranosidase may be 2.5 parts by weight or more based on 100 parts by weight of the high temperature-β-glycosidase.
In one aspect of the present invention, the high temperature-β-glycosidase may be an enzyme consisting of the amino acid sequence of SEQ ID NO: 2, and the high temperature-α-L-arabinofuranosidase may be an enzyme consisting of the amino acid sequence of SEQ ID NO: 4.
In one aspect of the invention, the method may be a method for preparing a composition for production of ginsenoside compound K, comprising expression in E. coli transformed with a vector comprising the base sequence of SEQ ID NO: 3; and a vector comprising the base sequences of SEQ ID NO: 13 and SEQ ID NO: 14.
In another aspect, the present invention provides a method for preparing ginsenoside compound K, comprising the step of fermenting a saponin-containing material comprising at least one of ginsenoside Rb1, ginsenoside Rb2, ginsenoside Rc, and ginsenoside Rd with a high temperature-β-glycosidase and a high temperature-α-L-arabinofuranosidase.
In another aspect of the present invention, the step of fermentation may be fermentation using the composition for production of ginsenoside compound K according to any one of the aspects of the present invention.
In another aspect of the invention, the step of fermentation may be applying each of a high temperature-β-glycosidase and a high temperature-aα-L-arabinofuranosidase.
In another aspect of the present invention, the high temperature-β-glycosidase may be a β-glycosidase of Sulfolobus solfataricus, and the high temperature-α-L-arabinofuranosidase may be an α-L-arabinofuranosidase of Thermotoga petrophila.
In another aspect of the present invention, the high temperature-α-L-arabinofuranosidase may be applied in an amount of 1 part by weight or more based on 100 parts by weight of the high temperature-β-glycosidase.
In another aspect of the present invention, the saponin-containing material may be red ginseng extract.
In another aspect of the present invention, the fermentation may be fermentation at a temperature of 70° C. to 95° C.
In another aspect of the present invention, the fermentation may be fermentation at a temperature of 80° C. to 90° C.
The composition for production of ginsenoside compound K and the method for preparing ginsenoside compound K according to one aspect of the present invention allow high temperature-β-glycosidase and high temperature-α-L-arabinofuranosidase to exhibit stable activity even at high temperatures, thereby increasing a reaction rate.
The composition for production of ginsenoside compound K and the method for preparing ginsenoside compound K according to one aspect of the present invention allow a large quantity of ginsenoside compound K to be produced in a short time, thereby exhibiting an effect of producing a high yield, and thus can be utilized industrially.
Hereinafter, the present invention will be described in detail.
In one aspect, the present invention provides a composition for production of ginsenoside compound K comprising a high temperature-β-glycosidase and a high temperature-α-L-arabinofuranosidase.
As used herein, the term “high temperature” enzyme refers to an enzyme that exhibits optimum activity at a high temperature of 70-95° C., rather than an intermediate temperature of 10-50° C., which is the optimum temperature for enzyme activity.
In one aspect of the present invention, the high temperature-β-glycosidase may be a β-glycosidase of Sulfolobus solfataricus, and the high temperature-α-L-arabinofuranosidase may be an α-L-arabinofuranosidase of Thermotoga petrophila.
In one aspect of the present invention, the high temperature-β-glycosidase and the high temperature-α-L-arabinofuranosidase of the present invention are obtained from Sulfolobus solfataricus and Thermotoga petrophila, which are high temperature organisms, by 1) directly isolating them from these strains and purifying them or 2) cloning the genes of each of the enzymes from the strains, expressing them in a recombinant expression vector, and purifying them. The method for obtaining the enzymes from microorganisms is a conventional method in the art (Sambrook, J. and Russell, D. W. Molecular Cloning 3rd Ed. Cold Spring Harbor Laboratory, 2001).
When the β-glycosidase obtained by a conventional method is applied to red ginseng extract, ginsenoside Rc and compound Mc among protopanaxadiol-type saponins are left, which limits the production yield of ginsenoside compound K (
In one aspect of the present invention, α-L-arabinofuranosidase derived from Thermotoga petrophila exhibited about 17 times higher activity than α-L-arabinofuranosidase derived from Caldicellulosiruptor saccharolyticus, which has been conventionally used in the production of ginsenoside compound K. Also, its expression pattern was enhanced by host cell selection and the introduction of chaperone (
In one aspect of the present invention, the content of the high temperature-α-L-arabinofuranosidase may be 1 part by weight or more based on 100 parts by weight of the high temperature-β-glycosidase.
Specifically, the content of the temperature-α-L-arabinofuranosidase may be 1 part by weight or more, 1.5 parts by weight or more, 2.0 parts by weight or more, 2.1 parts by weight or more, 2.2 parts by weight or more, 2.3 parts by weight or more, 2.4 parts by weight or more, 2.5 parts by weight or more, 2.6 parts by weight or more, 2.7 parts by weight or more, 2.8 parts by weight or more, or 3.0 parts by weight or more based on 100 parts by weight of the high temperature-β-glycosidase. Also, the content of the high temperature-α-L-arabinofuranosidase may be 5.0 parts by weight or less, 4.5 parts by weight or less, or 4.0 parts by weight or less based on 100 parts by weight of the high temperature-β-glycosidase.
The high temperature-α-L-arabinofuranosidase can achieve the maximum generation of compound K economically while minimizing the concentration of the enzyme, when the weight ratio of the high temperature-β-glycosidase is within the above range.
Preferably, the content of the temperature-α-L-arabinofuranosidase may be 2 parts by weight or more based on 100 parts by weight of the high temperature-β-glycosidase.
More preferably, the content of the high temperature-α-L-arabinofuranosidase may be 2.5 parts by weight or more based on 100 parts by weight of the high temperature-β-glycosidase. In one aspect of the present invention, when red ginseng extract is used as a substrate, all of the remaining compounds Mc are converted to compounds K at a concentration ratio of β-glycosidase derived from Thermotoga petrophila and α-L-arabinofuranosidase derived from Sulfolobus solfataricus of 40:1 (
As described above, the composition for production of ginsenoside compound K comprising a high temperature-β-glycosidase and a high temperature-α-L-arabinofuranosidase according to one aspect of the present invention controls the reaction rate rapidly at a high temperature of 85° C. and thereby achieves the effect of producing ginsenoside compound K in a short time at a high yield and using a low enzyme concentration, when reacted with a mixture of ginsenosides Rb1, Rb2, Rc, and Rd, which are major diol-type saponins in red ginseng extract, in a mixed solution of a buffer solution and an aqueous solvent.
In one aspect of the present invention, the high temperature-β-glycosidase may be an enzyme consisting of the amino acid sequence of SEQ ID NO: 2, and the high temperature-α-L-arabinofuranosidase may be an enzyme consisting of the amino acid sequence of SEQ ID NO: 4.
In one aspect of the invention, the method may be a method for preparing a composition for production of ginsenoside compound K, comprising expression in E. coli transformed with a vector comprising the base sequence of SEQ ID NO: 3; and a vector comprising the base sequences of SEQ ID NO: 13 and SEQ ID NO: 14. The vector comprising the base sequences of SEQ ID NO: 13 and SEQ ID NO: 14 may be chaperone pGrp7.
In another aspect, the present invention provides a method for preparing ginsenoside compound K, comprising the step of fermenting a saponin-containing material comprising at least one of ginsenoside Rb1, ginsenoside Rb2, ginsenoside Rc, and ginsenoside Rd with a high temperature-β-glycosidase and a temperature-α-L-arabinofuranosidase.
In another aspect of the present invention, the step of fermentation may be fermentation using the composition for production of ginsenoside compound K according to any one of the aspects of the present invention.
In another aspect of the invention, the step of fermentation may be applying each of a high temperature-β-glycosidase and a high temperature-α-L-arabinofuranosidase. In another aspect of the present invention, the high temperature-β-glycosidase may be a β-glycosidase of Sulfolobus solfataricus, and the high temperature-α-L-arabinofuranosidase may be an α-L-arabinofuranosidase of Thermotoga petrophila. In another aspect of the present invention, the high temperature-α-L-arabinofuranosidase may be applied in an amount of 1 part by weight or more based on 100 parts by weight of the high temperature-β-glycosidase. Specifically, the content of the high temperature-α-L-arabinofuranosidase may be 1 part by weight or more, 1.5 parts by weight or more, 2.0 parts by weight or more, 2.1 parts by weight or more, 2.2 parts by weight or more, 2.3 parts by weight or more, 2.4 parts by weight or more, 2.5 parts by weight or more, 2.6 parts by weight or more, 2.7 parts by weight or more, 2.8 parts by weight or more, or 3.0 parts by weight or more based on 100 parts by weight of the high temperature-β-glycosidase. Also, the content of the high temperature-α-L-arabinofuranosidase may be 5.0 parts by weight or less, 4.5 parts by weight or less, or 4.0 parts by weight or less based on 100 parts by weight of the high temperature-β-glycosidase.
In one embodiment of the present invention, a) PCR is performed with genomic DNA of Sulfolobus solfataricus and Thermotoga petrophila and their respective primers to amplify the DNA fragments comprising each of high temperature-β-glycosidase and high temperature-α-L-arabinofuranosidase genes; b) the amplified DNA fragments comprising each of high temperature-β-glycosidase and high temperature-α-L-arabinofuranosidase gene are treated with restriction enzymes and each of them is cloned into plasmid vectors pET-24a(+) and pET-21a(+) to construct recombinant expression vectors pET-24a(+)/β-glycosidase and pET-21a(+)/α-L-arabinofuranosidase; c) E. coli ER2566 is transformed with the vectors according to a conventional transformation method; d) E. coli transformed with each of high temperature-β-glycosidase genes and high temperature α-L-arabinofuranosidase genes is cultured; e) gene expression is induced during culture to produce a high temperature-β-glycosidase and a high temperature-α-L-arabinofuranosidase; and f) the expressed high temperature-β-glycosidase and high temperature-α-L-arabinofuranosidase proteins are isolated and obtained.
The pET-21a(+)/α-L-arabinofuranosidase in the above step c) may be transformed together with the chaperone vector pGro7 into BL21(DE3), which shows the highest expression among various strains such as E. coli ER2566, BL21(DE3), JM109 and Origami B, as a host.
The process of isolating the high temperature (β-glucosidase and high temperature-α-L-arabinofuranosidase proteins expressed in the above step f) may consist of the steps of: (a) lysing the culture solution of microorganisms; (b) centrifuging the cell lysate to obtain a supernatant; (c) subjecting the supernatant to heat treatment at a high temperature and centrifuging the resultant; and (d) filtering the thus-obtained supernatant to isolate an enzyme liquid.
In the above step (a), preferably, cells are lysed at a pressure of about 15,000 lb/in2 using a device such as a French press. In the above step (c), preferably, the cell supernatant is subjected to heat treatment at a temperature of 75° C. for about 10 minutes. In the above step (d), preferably, the filtration is performed using a filter paper of about 0.45 μm.
Also, the substrate may be ginsenosides Rb1, Rb2, Rc, and Rd, which are diol-type saponins in red ginseng extract, and may be used as a mixture in the preparation of ginsenoside compound K. The reaction solvent may be a buffer solution such as Mcllvaine buffer.
As described above, the reaction between the high temperature-β-glycosidase and high temperature-α-L-arabinofuranosidase and the substrate in the reaction solvent is performed preferably at a pH of 5.0 to 7.0 and a temperature of 70 to 95° C., more preferably at a pH of 6.0 and a temperature of 85° C.
The method for preparing ginsenoside compound K using a high temperature-β-glycosidase and a high temperature-α-L-arabinofuranosidase according to the present invention allows a high temperature-β-glycosidase derived from Sulfolobus solfataricus and a high temperature-α-L-arabinofuranosidase derived from Thermotoga petrophila to exhibit stable activity even at high temperatures, thereby increasing a reaction rate. As a result, it allows a large quantity of ginsenoside compound k to be produced in a short time, thereby exhibiting an effect of producing a high yield, and thus can be utilized industrially.
In another aspect of the present invention, the saponin-containing material may be red ginseng extract.
In another aspect of the present invention, the fermentation may be performed at a temperature of 70° C. to 95° C. Specifically, the fermentation temperature may be 70° C. or more, 72° C. or more, 74° C. or more, 76° C. or more, 78° C. or more, 80° C. or more, 82° C. or more, or 84° C. or more. Also, the fermentation temperature may be 95° C. or less, 93° C. or less, 91° C. or less, 90° C. or less, 88° C. or less, 86° C. or less, or 84° C. or less. When the temperature is within the above range, the production yield of ginsenoside K is excellent.
Hereinafter, preferred examples of the present invention will be described to facilitate understanding of the present invention. However, the following examples are provided only to facilitate understanding of the present invention, and the scope of the present invention is not limited thereto.
Preparation of a Recombinant Expression Vector Comprising a High Temperature-α-glycosidase Coding Base Sequence or a High Temperature-α-L-arabinofuranosidase Coding Base Sequence, and a Transformed Microorganism
In order to prepare a high temperature-β-glycosidase, a β-glycosidase gene derived from Sulfolobus solfataricus was isolated. Also, in order to prepare a high temperature-α-L-arabinofuranosidase, an α-L-arabinofuranosidase gene derived from Thermotoga petrophila was isolated.
Specifically, Sulfolobus solfataricus and Thermotoga petrophila, whose base sequence and amino acid sequence are already specified, were selected and the genomic DNA of each was extracted. The Sulfolobus solfataricus used was DSM 1617 purchased from the DSMZ (Germany), and the Thermotoga petrophila used was DSM 13995 purchased from the DSMZ (Germany).
Also, primers were prepared using the base sequence of the β-glycosidase gene of Sulfolobus solfataricus (GenBank Accession No. M34696) and the base sequence of the α-L-arabinofuranosidase gene of Thermotoga petrophila (GenBank Accession No. ABQ46651, respectively.
The DNA base sequence of the β-glycosidase of Sulfolobus solfataricus was as shown in SEQ ID NO: 1, and the amino acid sequence thereof was as shown in SEQ ID NO: 2.
The DNA base sequence of the α-L-arabinofuranosidase of Thermotoga petrophila was as shown in SEQ ID NO: 3, and the amino acid sequence thereof was as shown in SEQ ID NO: 4.
The forward and reverse primers for the β-glycosidase of Sulfolobus solfataricus were as shown in SEQ ID NO: 5 and SEQ ID NO: 6, respectively.
In addition, the forward and reverse primers for α-L-arabinofuranosidase of Thermotoga petrophila were as shown in SEQ ID NO: 7 and SEQ ID NO: 8, respectively.
Polymerase chain reaction (PCR) was performed using the genomic DNA and primers to amplify the base sequences of the corresponding genes. After the respective genes were obtained in large quantities by the above procedure, they were inserted into plasmid vectors pET-24a(+) and pET-21a to prepare recombinant expression vectors pET-24a(+)/β-glycosidase and pET-21a/α-L-arabinofuranosidase.
The plasmid vector pET-24a(+) was as shown in SEQ ID NO: 9.
The plasmid vector pET-21a was as shown in SEQ ID NO: 10.
The recombinant expression vector pET-24a(+)/β-glycosidase was as shown in SEQ ID NO: 11.
The recombinant expression vector pET-21a/α-L-arabinofuranosidase was as shown in SEQ ID NO: 12.
Also, the thus-prepared recombinant expression vectors were transformed into E. coli strain ER2566 by a conventional transformation method. pET-21a/α-L-arabinofuranosidase was also transformed into E. coli strains BL21(DE3), JM109 and Origami B.
The E. coli strains ER2566 and BL21(DE3) were purchased from New England Biolabs (NEB).
The E. coli strain JM109 was purchased from Takara.
The E. coli strain Origami B was purchased from Novagen.
BL21(DE3), which among them exhibited the highest expression, as a host was transformed with pET-21a/α-L-arabinofuranosidase and the chaperone vector pGro7, which was a commercial chaperone vector purchased from Takara. The chaperone vector pGro7, which was an independent plasmid, was co-transformed with the pET-21a/α-L-arabinofuranosidase vector into the strain BL21(DE3).
The chaperone vector pGro7 was a vector that simultaneously expresses GroEL and GroES genes. The GroEL gene was as shown in SEQ ID NO: 13, and the GroES gene was as shown in SEQ ID NO: 14. A schematic diagram of the chaperon pGro7 vector is shown in
The transformed recombinant E. coli is referred to as E. coli strain ER2566 pET-24a(+)/β-glycosidase, E. coli strains ER2566, BL21(DE3), JM109, and Origami B pET-21a/α-L-arabinofuranosidase, and E. coli strain BL21(DE3) pET-21a/α-L-arabinofuranosidase-pGro7.
The transformed E. coli was added with 20% glycerine solution and stored frozen before culture.
In order to mass produce β-glycosidase and α-L-arabinofuranosidase, the frozen E. coli strain ER2566 pET-24a(+)/β-glycosidase, E. coli strains ER2566, BL21(DE3), JM109, and Origami B pET-21a/α-L-arabinofuranosidase, and E. coli strain BL21(DE3) pET-21a/α-L-arabinofuranosidase-pGro7 each were seeded into a 250 ml flask containing 50 ml of LB medium, and then subjected to shaking culture in a shaking incubator at 37° C. until the absorbance at 600 nm reached 2.0. Then, the culture solution was added to a 21 Erlenmeyer flask containing 500 ml of LB medium and cultured until the absorbance at 600 nm reached 0.8. During the process, the stirring speed was 200 rpm and the culture temperature was 37° C. The resultant was added with 0.1 mM IPTG (isopropyl-beta-thiogalactoside) to induce production of the overexpressed enzyme. The stirring speed was adjusted to 150 rpm and the culture temperature was adjusted to 16° C.
In order to purify the thus-obtained high temperature-β-glycosidase and high temperature-α-L-arabinofuranosidase, the cultures of the transformed strains were centrifuged at 4,000×g for 4 to 30 minutes. Then, the cell solutions were lysed using a French press at 15,000 lb/in2. The cell lysates were centrifuged again at 13,000×g for 4 to 20 minutes and subjected to heat treatment at a high temperature of 75° C. for 10 minutes. The thus-obtained heat-treated product was centrifuged again at 13,000×g for 4 to 20 minutes. The resultant supernatant was filtered with a 0.45 μm filter paper and isolated as an enzyme liquid which can be used for the production of ginsenoside compound K.
The expression levels of the α-L-arabinofuranosidase enzyme liquids isolated from various host strains, the enzyme suspensions before subjected to heat treatment, and the cell debris obtained by centrifugation according to Example 2 were qualitatively compared through SDS-PAGE analysis.
As a result, as shown in
It was found that when the high temperature-β-glycosidase isolated in Example 2 was applied to red ginseng extract, ginsenoside Rc and compound Mc among protopanaxadiol-type saponins were left, which limited the production yield of ginsenoside compound K (
In order to convert the residual ginsenoside Rc and compound Mc into compound K, α-L-arabinofuranosidase was added for co-treatment with β-glycosidase, and then the compound K production was compared.
The high temperature-β-glycosidase isolated in Example 2 was added with varying concentration of α-L-arabinofuranosidase, which was confirmed to have enhanced expression in Test Example 1, and the optimum ratio of the enzymes was determined in the following manner. The two enzymes were reacted with red ginseng extract and compared for the degree of compound K production.
In order to determine the optimum concentration ratio of β-glycosidase and α-L-arabinofuranosidase, red ginseng extract containing about 7.5 mg/ml of protopanaxadiol-type saponins, 50 mM Mcilvaine buffer solution (pH 6.0), and a mixture of the two enzymes were applied.
When 2 mg/ml of β-glycosidase alone was applied to red ginseng extract as a substrate, it was found that most of ginsenosides Rd disappeared after 12 hours as shown in
The concentration of α-L-arabinofuranosidase at which all of compounds Mc (C-Mc) are converted was determined by varying the concentration of α-L-arabinofuranosidase with the concentration of β-glycosidase fixed at 2 mg/ml. Specifically, the concentration of α-L-arabinofuranosidase was decreased from 0.1 mg/ml to 0.0032 mg/ml. As a result, as shown in
Production of Ginsenoside Compound K using High Temperature-β-Glycosidase and High Temperature α-L-Arabinofuranosidase
In order to develop a method for preparing ginsenoside compound K using the high temperature-β-glycosidase of Example 2 and the α-L-arabinofuranosidase with enhanced expression in Test Example 1, the production of ginsenoside compound K over time was measured using red ginseng extract and tiny-sized ginseng extract at an optimum ratio of the enzymes in each substrate as determined above.
The test results are shown in
Until now, a suspension of β-glycosidase (2.3 mg/ml) from Sulfolobus solfataricus and α-L-arabinofuranosidase (0.39 mg/ml) from Thermotoga petrophila has been found to achieve the highest productivity in production of ginsenoside compound K. It has been reported that the use of the suspension in red ginseng extract containing about 7.5 mg/ml of protopanaxadiol-type saponins resulted in production of 4.2 mg/ml of ginsenoside compound K for 12 hours (Kyung-Chul Shin et al. 2015, Compound K Production from Red Ginseng Extract by β-Glycosidase from Sulfolobus solfataricus Supplemented with α-L-arabinofuranosidase from Caldicellulosiruptor saccharolyticus. PLoS One. 28;10(12):e0145876.).
Upon comparing the above case and the present invention, in the case of using the high temperature-β-glycosidase and the high temperature-α-L-arabinofuranosidase according to one aspect of the present invention, the total enzyme concentration was about 1.3 times lower than in the case of using the two enzymes, and the concentration of α-L-arabinofuranosidase among them was 8 times lower than the above case, and the productivity increased by about 1.2 times. Thus, it was confirmed that the productivity per enzyme concentration in this experiment was 1.3 times higher than the above case.
Number | Date | Country | Kind |
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10-2016-0124986 | Sep 2016 | KR | national |
Filing Document | Filing Date | Country | Kind |
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PCT/KR2017/010849 | 9/28/2017 | WO | 00 |