Probing the catalytic promiscuity of a regio- and stereospecific C-glycosyltransferase from Mangifera indica.
Chen DaWei, Chen RiDao, Wang RuiShan, Li JianHua, Xie KeBo, Bian ChuanCai, Sun LiLi, Zhang XiaoLin, Liu JiMei, Yang Lin, Ye Fei, Yu XiaoMing, Dai JunGui
Author Affiliation: State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, 1 Xian Nong Tan Street, Beijing 100050, China.
Angewandte Chemie International Edition 54 : 12678-12682
Abstract : The catalytic promiscuity of the novel benzophenone C-glycosyltransferase, MiCGT, which is involved in the biosynthesis of mangiferin from Mangifera indica, was explored. MiCGT exhibited a robust capability to regio- and stereospecific C-glycosylation of 35 structurally diverse druglike scaffolds and simple phenolics with UDP-glucose, and also formed O- and N-glycosides. Moreover, MiCGT was able to generate C-xylosides with UDP-xylose. The OGT-reversibility of MiCGT was also exploited to generate C-glucosides with simple sugar donor. Three aryl-C-glycosides exhibited potent SGLT2 inhibitory activities with IC50 values of 2.6×, 7.6×, and 7.6×10-7M, respectively. These findings demonstrate for the first time the significant potential of an enzymatic approach to diversification through C-glycosidation of bioactive natural and unnatural products in drug discovery.