Asymmetric ketone reduction by a hyperthermophilic alcohol dehydrogenase. The substrate specificity, enantioselectivity and tolerance of organic solvents
作者:Dunming Zhu、Hiba T. Malik、Ling Hua
DOI:10.1016/j.tetasy.2006.10.042
日期:2006.11
asymmetric ketone reduction, the substrate specificity and enantioselectivity of an alcohol dehydrogenase from the hyperthermophilic archaeon Pyrococcus furiosus have been evaluated. This hyperthermophilic alcohol dehydrogenase catalyzes the reduction of various ketones including aryl ketones, α- and β-ketoesters. Interestingly, aryl ketones, phenyl-substituted α- and β-ketoesters were reduced to the
为了寻找有效的生物催化剂,以减少不对称酮的还原反应,需要从嗜热古菌激烈热球菌中分离出乙醇脱氢酶的底物特异性和对映选择性。经过评估。该超嗜热醇脱氢酶催化各种酮的还原,包括芳基酮,α-和β-酮酸酯。有趣的是,芳基酮,苯基取代的α-和β-酮酸酯以对映体纯的形式还原为相应的手性醇,而缺少苯基的底物以中等的对映选择性被还原。因此表明,羰基旁边的苯基可能对实现出色的对映选择性非常有帮助,这可以为将来通过合理的底物工程应用这种有用的酶提供有价值的指导。反应温度提高了酶活性,但对映选择性没有影响。异丙醇,甲基叔丁基醚和己烷,对于在水性缓冲液中溶解度低的酮还原而言,特别重要和有用。