Enantioselective hydrolysis of various substituted styrene oxides with Aspergillus Niger CGMCC 0496Electronic supplementary information (ESI) available: experimental details. See http://www.rsc.org/suppdata/ob/b3/b312469j/
作者:Hao Jin、Zu-yi Li、Xiao-Wei Dong
DOI:10.1039/b312469j
日期:——
Enantioselective biohydrolysis of various substituted styrene oxides using whole fungus cells of Aspergillus nigerCGMCC 0496 are described. The results show not only para- but also some ortho- substituted styrene oxides can achieve high enantioselectivity during the hydrolysis.
Structure-Guided Regulation in the Enantioselectivity of an Epoxide Hydrolase to Produce Enantiomeric Monosubstituted Epoxides and Vicinal Diols via Kinetic Resolution
Structure-guided microtuning of an Aspergillus usamii epoxide hydrolase was executed. One mutant, A214C/A250I, displayed a 12.6-fold enhanced enantiomeric ratio (E = 202) toward rac-styrene oxide, achieving its nearly perfect kinetic resolution at 0.8 M in pure water or 1.6 M in n-hexanol/water. Several other beneficial mutants also displayed significantly improved E values, offering promising biocatalysts
对Aspergillus usamii环氧水解酶进行了结构引导的微调。一种突变体 A214C/A250I对消旋-氧化苯乙烯的对映体比 ( E = 202)提高了 12.6 倍,在纯水中 0.8 M 或正己醇/水中 1.6 M 时实现了近乎完美的动力学分辨率。其他一些有益的突变体也显示出显着提高的E值,为获得 19 种结构多样的手性单取代环氧化物(97.1 – ≥ 99% ee s)和邻二醇(56.2–98.0% ee p)提供了有希望的生物催化剂,并且产率很高。
Enantioselective Hydrolysis of<i>o</i>-Nitrostyrene Oxide by Whole Cells of<i>Aspergillus niger</i>CGMCC 0496
作者:Hao JIN、Zu-yi LI
DOI:10.1271/bbb.66.1123
日期:2002.1
The asymmetric biohydrolysis is described of o-nitrostyrene oxide with high selectivity by whole cells of Aspergillus niger CGMCC 0496. Both the epoxide and diol could be obtained in a high state of optical purity (over 98%). Product inhibition was found when using a high ratio of substrate to cells.