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- W1967093089 abstract "A new soil isolate, Fusarium proliferatum ECU2042, was found capable of producing a ginsenoside Rg(3) hydrolase (a special beta-glucosidase) which is useful for production of a very potent antitumor agent Rh-2. By investigating its fermentation progress, the optimal time for beta-glucosidase biosynthesis was determined as 72 h. The crude beta-glucosidase was partially purified by 49.4-fold from the cell-free extract with an activity yield of 13%. The catalytic performance of the partially purified beta-glucosidase was examined, giving optima of pH and temperature at pH 5.0-6.0 and 50 degrees C. It was found that the F. proliferatum beta-glucosidase can also hydrolyze cellobiose, but not active towards a frequently used artificial substrate p-nitrophenyl beta-D-alucopyranoside (pNPG). In a lab-scale preparation, the bio-hydrolytic reaction was carried out at 50 degrees C for 24 h in 50 ml NaAc/HAc buffer (100 mM, pH 5.0) containing 50 mg Rg(3) and 12 mg lyophilized crude enzyme extract, giving the ginsenoside Rh-2 in 60.3% conversion. (c) 2005 Elsevier B.V. All rights reserved." @default.
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- W1967093089 date "2006-02-01" @default.
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- W1967093089 title "Enzymatic transformation of ginsenoside Rg3 to Rh2 using newly isolated Fusarium proliferatum ECU2042" @default.
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- W1967093089 doi "https://doi.org/10.1016/j.molcatb.2005.12.004" @default.
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