Highly Promiscuous Flavonoid 3-<i>O</i>-Glycosyltransferase from <i>Scutellaria baicalensis</i>
作者:Zilong Wang、Shuang Wang、Zheng Xu、Mingwei Li、Kuan Chen、Yaqun Zhang、Zhimin Hu、Meng Zhang、Zhiyong Zhang、Xue Qiao、Min Ye
DOI:10.1021/acs.orglett.9b00524
日期:2019.4.5
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
从黄cut中发现了一种高度区域特异性和供体混杂的3- O-糖基转移酶Sb3GT1(UGT78B4)。Sb3GT1可以接受五个糖供体(UDP-Glc / -Gal / -GlcNAc / -Xyl / -Ara)催化17种黄酮醇的3- O-糖基化,转化率可以> 98%。通过按比例放大的酶催化作用获得了五种新的糖苷。分子建模和定点诱变表明,G15和P187是供体滥交的关键催化残基。Sb3GT1可能是增加类黄酮3- O-糖苷结构多样性的有前途的催化剂。