Structural basis for a highly (S)-enantioselective reductase towards aliphatic ketones with only one carbon difference between side chain
作者:Afifa Ayu Koesoema、Yosuke Sugiyama、Zichang Xu、Daron M. Standley、Miki Senda、Toshiya Senda、Tomoko Matsuda
DOI:10.1007/s00253-019-10093-w
日期:2019.12
Aliphatic ketones, such as 2-butanone and 3-hexanone, with only one carbon difference among side chains adjacent to the carbonyl carbon are difficult to be reduced enantioselectively. In this study, we utilized an acetophenone reductase from Geotrichum candidum NBRC 4597 (GcAPRD) to reduce challenging aliphatic ketones such as 2-butanone (methyl ethyl ketone) and 3-hexanone (ethyl propyl ketone) to their
在与羰基碳相邻的侧链中仅具有一个碳差异的2-酮丁酮和3-己酮等脂肪族酮难以对映选择性地还原。在这项研究中,我们利用了来自Geotrichum candidum NBRC 4597(GcAPRD)的苯乙酮还原酶将具有挑战性的脂族酮(例如2-丁酮(甲乙酮)和3-己酮(乙丙酮))还原为相应的(S)醇, ee分别为94%ee和> 99%ee。通过晶体结构的确定,表明残基Trp288限制了小的结合口袋的大小。对接模拟表明,Trp288在形成CH⋯π相互作用方面起着重要的作用,以使pro-S结合态中的酮正确定向,从而生成(S)醇。