Simultaneous engineering of an enzyme's entrance tunnel and active site: the case of monoamine oxidase MAO-N
作者:Guangyue Li、Peiyuan Yao、Rui Gong、Jinlong Li、Pi Liu、Richard Lonsdale、Qiaqing Wu、Jianping Lin、Dunming Zhu、Manfred T. Reetz
DOI:10.1039/c6sc05381e
日期:——
A new directed evolution approach is presented to enhance the activity of an enzyme and to manipulate stereoselectivity by focusing iterative saturation mutagenesis (ISM) simultaneously on residues lining the entrance tunnel and the binding pocket. This combined mutagenesis strategy was applied successfully to the monoamine oxidase from Aspergillus niger (MAO-N) in the reaction of sterically demanding
提出了一种新的定向进化方法,通过同时将迭代饱和诱变(ISM)集中在入口通道和结合袋内的残基上来增强酶的活性并操纵立体选择性。这种组合诱变策略已成功应用于黑曲霉单胺氧化酶(MAO-N)在空间要求底物的反应中,该底物对基于苯并哌啶支架的手性药物的合成感兴趣。在( S )-1,2,3,4-四氢-1-甲基-异喹啉、( S )-1,2,3,4-四氢-1-的合成中实现了Turner型去消旋化对映选择性的逆转乙基异喹啉和( S )-1,2,3,4-四氢-1-异丙基异喹啉。广泛的分子动力学模拟表明,催化特性的改变是由于入口隧道的疏水性增加与结合袋形状的改变相一致。