An (<i>R</i>)-Imine Reductase Biocatalyst for the Asymmetric Reduction of Cyclic Imines
作者:Shahed Hussain、Friedemann Leipold、Henry Man、Elizabeth Wells、Scott P. France、Keith R. Mulholland、Gideon Grogan、Nicholas J. Turner
DOI:10.1002/cctc.201402797
日期:2015.2
enantiomerically pure chiral amines continues to expand, few existing methods provide access to secondary amines. To address this shortcoming, we have over-expressed the gene for an (R)-imine reductase [(R)-IRED] from Streptomyces sp. GF3587 in Escherichia coli to create a recombinant whole-cell biocatalyst for the asymmetric reduction of prochiral imines. The (R)-IRED was screened against a panel of cyclic imines
尽管可用于合成对映体纯的手性胺的生物催化剂的范围不断扩大,但现有的方法很少能提供仲胺的途径。为了解决这个缺点,我们过量表达了链霉菌属(Streptomyces sp。)的(R)-亚胺还原酶[(R)-IRED]的基因。GF3587在大肠杆菌中创建重组全细胞生物催化剂,用于不对称还原前手性亚胺。针对一组环状亚胺和两个亚胺离子筛选了(R)-IRED,结果显示该催化剂具有较高的催化活性和对映选择性。从亚胺前体的制备规模的生物碱(R)-亚氨酸的合成规模(90%收率; 99%ee)以克为单位进行。酶活性位点的同源模型,基于来自链霉菌的紧密相关的(R)-IRED的结构,