Asymmetric Bioreduction of CC Bonds using Enoate Reductases OPR1, OPR3 and YqjM: Enzyme-Based Stereocontrol
作者:Mélanie Hall、Clemens Stueckler、Heidemarie Ehammer、Eva Pointner、Gustav Oberdorfer、Karl Gruber、Bernard Hauer、Rainer Stuermer、Wolfgang Kroutil、Peter Macheroux、Kurt Faber
DOI:10.1002/adsc.200700458
日期:2008.2.22
Three cloned enoate reductases from the “old yellow enzyme” family of flavoproteins were investigated in the asymmetric bioreduction of activated alkenes. 12-Oxophytodienoate reductase isoenzymes OPR1 and OPR3 from Lycopersicon esculentum (tomato), and YqjM from Bacillus subtilis displayed a remarkably broad substrate spectrum by reducing α,β-unsaturated aldehydes, ketones, maleimides and nitroalkenes
在活化烯烃的不对称生物还原中,研究了从黄素蛋白“老黄酶”家族中克隆的三个烯酸还原酶。来自番茄的Lycopersicon esculentum(番茄)的12-氧代乙二酸酯还原酶同工酶OPR1和OPR3 ,以及枯草芽孢杆菌的YqjM通过还原α,β-不饱和醛,酮,马来酰亚胺和硝基烯烃显示出非常宽的底物谱。反应以绝对的化学选择性进行-仅还原了共轭CC键,而分离的烯烃和羰基仍保持完整-具有出色的立体选择性(ee高达> 99%)。还原硝基烯烃后,可以通过选择适当的酶(OPR1与OPR3或YqjM相比),后者以优异的ee值提供了相应的对映体硝基烷。分子建模表明,这种“基于酶的立体控制”是由活性位点几何形状内的细微差异引起的。