Combinatorial Library Based Engineering of<i>Candida antarctica</i>Lipase A for Enantioselective Transacylation of<i>sec</i>-Alcohols in Organic Solvent
A method for determining lipase enantioselectivity in the transacylation of sec‐alcohols in organic solvent was developed. The method was applied to a model library of Candidaantarcticalipase A (CalA) variants for improved enantioselectivity (E values) in the kinetic resolution of 1‐phenylethanol in isooctane. A focused combinatorial gene library simultaneously targeting seven positions in the enzyme
开发了一种测定有机溶剂中仲醇转酰基反应中脂肪酶对映选择性的方法。该方法应用于南极假丝酵母脂肪酶 A (CalA) 变体模型库,以提高 异辛烷中 1-苯基乙醇的动力学拆分的对映选择性( E值)。设计了同时靶向酶活性位点七个位置的集中组合基因库。通过组氨酸标签(His 6标签)将酶变体固定在镍包被的 96 孔微量滴定板上,筛选异辛烷中 1-苯基乙醇的转酰基作用,并通过 GC 进行分析。双突变体 Y93L/L367I 显示出最高的对映选择性。该酶变体的E 值为 100 ( R ),比野生型 CalA ( E = 3) 有了显着改进。该变体还对测试的其他仲醇表现出高至优异的对映选择性。
HIRATAKE, JUN;INAGAKI, MINORU;NISHIOKA, TAKAAKI;ODA, JUNICHI, J. ORG. CHEM., 53,(1988) N6, C. 6130-6133
Irreversible and highly enantioselective acylation of 2-halo-1-arylethanols in organic solvents catalyzed by a lipase from Pseudomonas fluorescens
作者:Jun Hiratake、Minoru Inagaki、Takaaki Nishioka、Junichi Oda
DOI:10.1021/jo00261a033
日期:1988.12
Process for producing optically active compounds
申请人:Chisso Corporation
公开号:US04962031A1
公开(公告)日:1990-10-09
The present invention provides a process for producing optically active compounds by a biochemical method in which specific compounds having hydroxyl groups are reacted with esters in the presence of hydrolases. The compounds have the following general formula: ##STR1## wherein X is selected from halogen atoms and a cyano group. Y is selected from the group constituting substituted phenyl groups, halogen atoms, cyano, trifluoromethyl and amino groups and alkylamino and alkyloxycarbonyl groups in which alkyl groups have 1-20 carbon atoms. R is an alkylene group having 1-20 carbon atoms and n is 0 or 1.