Structure-guided engineering of an imine reductase IR-G36 gave a final variant M5 for reductive amination, enabling the asymmetric synthesis of a series of azacycloalkylamines with up to 47 g L−1 substrate loadings and up to 99 % conversion and >99 % ee. Crystal structures of IR-G36 and computational studies shed light on the structural basis for the performance improvement.
亚胺还原酶 IR-G36 的结构引导工程得到了用于还原胺化的最终变体 M5,从而能够不对称合成一系列氮杂环烷基胺,其底物负载量高达 47 g L -1,转化率高达 99 %,ee > 99 % . IR-G36 的晶体结构和计算研究揭示了性能改进的结构基础。
Structure-guided semi-rational design of an imine reductase for enantio-complementary synthesis of pyrrolidinamine
作者:Jun Zhang、Yaqing Ma、Fangfang Zhu、Jinping Bao、Qiaqing Wu、Shu-Shan Gao、Chengsen Cui
DOI:10.1039/d2sc07014f
日期:——
In this study, engineerediminereductases (IREDs) of IRED M5, originally from Actinoalloteichus hymeniacidonis, were obtained through structure-guided semi-rational design. By focusing on mutagenesis of the residues that directly interact with the ketone donor moiety, we identified two residues W234 and F260, playing essential roles in enhancing and reversing the stereoselectivity, respectively. Moreover