Resveratroloside 是一种 α-葡萄糖苷酶的竞争性新型抑制剂,能够调节血糖水平,并具有心脏保护作用。
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
[(2S,3R,4R,5S,6R)-5-[(E)-2-(3,5-二羟基苯基)乙烯基]-4,5-二羟基-6-(羟基甲基)-2-(苯氧基)四氢吡喃-3-基]3,4,5-三羟基苯甲酸酯 | resveratrol-4′-O-β-D-(2′′-O-galloyl)glucopyranoside | 105304-51-6 | C27H26O12 | 542.496 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
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—— | pterostilbene 4'-O-β-D-glucoside | —— | C22H26O8 | 418.444 |
The stilbene compound resveratrol was glycosylated to give its 4′-O-β-D-glucoside as the major product in addition to its 3-O-β-D-glucoside by a plant glucosyltransferase from Phytolacca americana expressed in recombinant Escherichia coli. This enzyme transformed pterostilbene to its 4′-O-β-D-glucoside, and converted pinostilbene to its 4′-O-β-D-glucoside as a major product and its 3-O-β-D-glucoside as a minor product. An analysis of antioxidant capacity showed that the above stilbene glycosides had lower oxygen radical absorbance capacity (ORAC) values than those of the corresponding stilbene aglycones. The 3-O-β-D-glucoside of resveratrol showed the highest ORAC value among the stilbene glycosides tested, and pinostilbene had the highest value among the stilbene compounds. The tyrosinase inhibitory activities of the stilbene aglycones were improved by glycosylation; the stilbene glycosides had higher activities than the stilbene aglycones. Resveratrol 3-O-β-D-glucoside had the highest tyrosinase inhibitory activity among the stilbene compounds tested.
Conduct structure-guided modification on the “hotspot” of glycosyltransferase UGTBL1 to significantly adjust its regioselectivity toward polydatin production.