Amination of Ketones by Employing Two New (S)-Selective ω-Transaminases and the His-Tagged ω-TA from Vibrio fluvialis
作者:Francesco G. Mutti、Christine S. Fuchs、Desiree Pressnitz、Nikolaus G. Turrini、Johann H. Sattler、Alexandra Lerchner、Arne Skerra、Wolfgang Kroutil
DOI:10.1002/ejoc.201101476
日期:2012.2
Two recently identified (S)-selective ω-transaminases (ω-TAs) that originate from Paracoccus denitrificans (Strep-PD-ωTA, cloned with an N-terminal Strep-tag II) and Pseudomonas fluorescens (PF-ωTA) were employed for the asymmetric amination of selected prochiral ketones. The substrates tested were transformed into optically pure amines (>99 % ee) with high conversion (up to >99 %). The ω-TAs led to
两种最近鉴定的 (S) 选择性 ω-转氨酶 (ω-TA) 源自反硝化副球菌(Strep-PD-ωTA,用 N 端 Strep-tag II 克隆)和荧光假单胞菌(PF-ωTA)用于选定的前手性酮的不对称胺化。测试的底物以高转化率(高达 >99%)转化为光学纯胺(>99%ee)。在没有二甲亚砜作为共溶剂的情况下,ω-TA 导致转化率高于其存在 (15%, v/v)。此外,研究表明,来自河流弧菌的带有 His 标签的重组转氨酶(His-VF-ωTA,用 N 端 His6 标签克隆)显示,对于单一底物乙酰乙酸乙酯,与相应的商业酶制剂(> 99 与 50 %)。