Biocatalytic racemization of α-hydroxycarboxylic acids using a stereo-complementary pair of α-hydroxycarboxylic acid dehydrogenases
作者:Anne Bodlenner、Silvia M. Glueck、Bettina M. Nestl、Christian C. Gruber、Nina Baudendistel、Bernhard Hauer、Wolfgang Kroutil、Kurt Faber
DOI:10.1016/j.tet.2009.06.051
日期:2009.9
Biocatalytic racemization of aliphatic, (aryl)aliphatic and aromatic α-hydroxycarboxylic acids was achieved via a reversible oxidation-reduction sequence using a pair of stereo-complementary Prelog- and anti-Prelog d- and l-α-hydroxyisocaproate dehydrogenases from Lactobacillus confusus DSM 20196 and Lactobacillus paracasei DSM 20008, resp., overexpressed in Escherichia coli. The mild reaction conditions
脂族,(芳基)脂族和芳族α-羟基羧酸的生物催化消旋作用是通过可逆的氧化还原序列进行的,使用了一对互补的,来自乳酸杆菌DSM的立体互补的Prelog-和反Prelog d-和1 -α-羟基异己酸脱氢酶。20196和副干酪乳杆菌DSM 20008,分别在大肠杆菌中过表达。温和的反应条件确保了基本的“纯净”异构化,形成α-酮酸的底物的不希望的“过度氧化”可以通过排除O 2和调节NAD + / NADH比率来抑制。