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22255-13-6

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Highly Promiscuous Flavonoid 3- O-Glycosyltransferase from Scutellaria baicalensis
A highly regio-specific and donor-promiscuous 3-O-glycosyltransferase, Sb3GT1 (UGT78B4), was discovered from Scutellaria baicalensis. Sb3GT1 could accept five sugar donors (UDP-Glc/-Gal/-GlcNAc/-Xyl/-Ara) to catalyze 3-O-glycosylation of 17 flavonols, and the conversion rates could be >98%. Five new glycosides were obtained by scaled-up enzymatic catalysis. Molecular modeling and site-directed mutagenesis revealed that G15 and P187 were critical catalytic residues for the donor promiscuity. Sb3GT1 could be a promising catalyst to increase structural diversity of flavonoid 3-O-glycosides.
Wang, Zilong,Wang, Shuang,Xu, Zheng,Li, Mingwei,Chen, Kuan,Zhang, Yaqun,Hu, Zhimin,Zhang, Meng,Zhang, Zhiyong,Qiao, Xue,Ye, Min
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p. 2241 - 2245
(2019/03/19)

Synthesis and biological evaluation of flavonoids as vasorelaxant agents
Several 5,7-dihydroxyflavone and quercetin 3-O-glycosides have been synthesized and evaluated for vasorelaxant activity. A logP-activity relationship amongst flavonoids was suggested.
Chen, Zhiwei,Hu, Yongzhou,Wu, Haohao,Jiang, Huidi
p. 3949 - 3952
(2007/10/03)

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Chemical Properties

Melting Point: 237-239 °C
Boiling Point: 828.061 °C at 760 mmHg
Flash Point:296.325 °C
Density: 1.863 g/cm³
Solubility:DMSO (Slightly), Ethanol (Slightly, Sonicated), Methanol (Slightly)
Storage Temp.:room temp
PKA: 6.17±0.40(Predicted)
PSA: 190.28000
LogP: 0.10020

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