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- W2069186319 abstract "Arbutin (Ab, 4-hydroxyphenyl β-glucopyranoside) is a glycosylated hydroquinone known to prevent the formation of melanin by inhibiting tyrosinase. An arbutin-α-glucoside was synthesized by the transglycosylation reaction of amylosucrase (AS) of Deinococcus geothermalis (DGAS) using arbutin and sucrose as an acceptor and a donor, respectively. The maximum yield of the arbutin transglycosylation product was determined to be over 98% with a 1:0.5 molar ratio of donor and acceptor molecules (sucrose and arbutin), in 50 mM sodium citrate buffer pH 7 at 35 °C. TLC and HPLC analyses revealed that only one transglycosylation product was observed, supporting the result that the transglycosylation reaction of DGAS was very specific. The arbutin transglycosylation product was isolated by preparative recycling HPLC. The structural analyses using 13C and 1H NMR proved that the transglycosylated product was 4-hydroxyphenyl β-maltoside (Ab-α-glucoside), in which a glucose molecule was linked to arbutin via an α-(1 → 4)-glycosidic linkage." @default.
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- W2069186319 date "2009-10-01" @default.
- W2069186319 modified "2023-10-16" @default.
- W2069186319 title "Highly selective biotransformation of arbutin to arbutin-α-glucoside using amylosucrase from Deinococcus geothermalis DSM 11300" @default.
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- W2069186319 doi "https://doi.org/10.1016/j.molcatb.2009.04.006" @default.
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