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Discovery of Glycosyltransferases Involved in the Biosynthesis of Ligupurpuroside B
Yihan Yang1,2, Yanan Wu1,3, Yibin Zhuang1
1Key Laboratory of Systems Microbial Biotechnology, Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin 300308, China.
Abstract:
In this study, we report the characterization of three glycosyltransferases involved in the biosynthesis of ligupurpuroside B, a complex acylated phenolic glycoside in Ligustrum robustum. UGT85AF8 catalyzed the formation of salidroside from tyrosol. UGT79G7, an osmanthuside A 1,3-rhamnosyltransferase, and UGT79A19, an osmanthuside B 1,4-rhamnosyltransferase, sequentially converted osmanthuside A into ligupurpuroside B. Orthologs of UGT79G7 were also discovered from other plants producing verbascoside. These rhamnosyltransferases expand the toolbox for the biosynthesis of natural products with various sugar chains.
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