Here we report a methionine sulfoxide reductase A (MsrA) homologue with extremely high substrate tolerance and a wide substrate scope for the biocatalytic preparation of enantiopure sulfoxides. This MsrA homologue which was obtained from Pseudomonas alcaliphila (named paMsrA) showed good activity and enantioselectivity towards a series of aryl methyl/ethyl sulfoxides 1a–1k, with electron-withdrawing
在这里,我们报告甲
硫氨酸亚砜还原酶A(MsrA)同源物具有极高的底物耐受性和广泛的底物范围,用于对映纯亚砜的
生物催化制备。从嗜碱假单胞菌获得的这种MsrA同源物(命名为pa MsrA)对一系列芳基甲基/乙基亚砜1a-1k具有良好的活性和对映选择性,在芳环上有吸电子或供电子取代基。通过
重组PA催化的外消旋亚砜的不对称还原拆分,可以制备出R构型的手性亚砜,其收率约为50%,对映体过量高达99%。MsrA蛋白。更重要的是,在高达320 mM(约45 g L -1)的初始底物浓度下,以高对映选择性(E > 200)成功完成了动力学拆分,这代表了
生物催化制备中底物浓度方面的巨大改进手性亚砜。