Nicotinamide-Dependent Ene Reductases as Alternative Biocatalysts for the Reduction of Activated Alkenes
作者:Katharina Durchschein、Silvia Wallner、Peter Macheroux、Wilfried Schwab、Thorsten Winkler、Wolfgang Kreis、Kurt Faber
DOI:10.1002/ejoc.201200776
日期:2012.9
Four NAD(P)H-dependent non-flavin ene reductases have been investigated for their ability to reduce activated C=C bonds in an asymmetric fashion by using 20 structurally diverse substrates. In comparison with flavin-dependent Old Yellow Enzyme homologues, a higher degree of electronic activation was required, because the best activities were obtained with enals and nitroalkenes rather than enones and
已经研究了四种 NAD(P)H 依赖性非黄素烯还原酶通过使用 20 种结构不同的底物以不对称方式还原活化的 C=C 键的能力。与依赖黄素的老黄酶同系物相比,需要更高程度的电子活化,因为使用烯醛和硝基烯烃而不是烯酮和羧酸酯获得了最佳活性。尽管来自 Fragaria x ananassa(草莓)的 FaEO 及其来自番茄(番茄)的同源物 SlEO 表现出狭窄的底物谱,但来自拟南芥(thale cress)的孕酮 5β-还原酶(At5β-StR)和白三烯 B4 12-羟基脱氢酶(LT4DH来自褐家鼠 (rat) 的 PGR) 似乎是有希望的候选物,特别是对于开链烯醛、硝基烯烃和 α 的不对称生物还原,β-不饱和γ-丁内酯。竞争性硝基还原和非酶促 Weitz-Scheffer 环氧化在很大程度上受到抑制。