the binding and activation of specific aldol donors, as well as their subsequent reaction with diverse aldehyde acceptors. Broadening the substrate scope of this evolutionarily naïve catalyst proved much easier than previous attempts to redesign natural aldolases, suggesting that such proteins may be excellent starting points for the development of customized biocatalysts for diverse practical applications
控制羟醛添加的区域和立体选择性通常具有挑战性。在这里,我们展示了对作为醛醇供体的
丙酮具有高度特异性的人工
醛缩酶可以通过单个活性位点突变重新设计,以接受具有显着效率、区域选择性和立体控制的线性和环状脂肪族酮。生化和晶体学数据显示突变的残基如何调节特定醛醇供体的结合和活化,以及它们随后与不同醛受体的反应。事实证明,扩大这种进化幼稚催化剂的底物范围比以前重新设计天然
醛缩酶要容易得多,这表明此类蛋白质可能是开发用于各种实际应用的定制
生物催化剂的极好起点。