Exploring the substrate scope of mutants derived from the robust alcohol dehydrogenase TbSADH
作者:Zhoutong Sun、Guangyue Li、Adriana Ilie、Manfred T. Reetz
DOI:10.1016/j.tetlet.2016.06.134
日期:2016.8
reduction of tetrahydrofuran-3-one, this difficult-to-reduce compound being a sterically small substrate. These mutants were now tested in the asymmetric reduction of seven structurally unrelated and sterically more demanding substrates, including acetophenone, benzyl methyl ketone, 4-phenyl-2-butanone, and 2-oxo-4-phenyl-butanoic acid ethyl ester. The variants clearly out-perform WT TbSADH, but overly
对于给定的立体选择性转化,作为催化剂的酶的定向进化为该特定反应提供了突变体,但是有机化学家需要以广泛的底物接受为特征的催化剂。在先前的研究中,我们成功地开发了来自嗜热厌氧杆菌的热稳健的醇脱氢酶TbSADH的一组变体,作为(R)-和(S选择性还原四氢呋喃-3-酮,这种难于还原的化合物是空间小的底物。现在对这些突变体进行了不对称还原七个结构上不相关且在空间上要求更高的底物的测试,这些底物包括苯乙酮,苄基甲基酮,4-苯基-2-丁酮和2-氧代-4-苯基丁酸乙酯。这些变体明显胜过WT TbSADH,但是过大的取代二苯甲酮衍生物未被WT或突变体接受。