Mutability‐Landscape‐Guided Engineering of
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‐Threonine Aldolase Revealing the Prelog Rule in Mediating Diastereoselectivity of C−C Bond Formation
作者:Wenlong Zheng、Zhongji Pu、Lanxin Xiao、Gang Xu、Lirong Yang、Haoran Yu、Jianping Wu
DOI:10.1002/anie.202213855
日期:2023.1.9
The Prelog rule in l-threonine aldolase holds that when the Cα anion of PLP-Gly attacks the carbonyl carbon atom of the aldehyde from the re-face, the (2S,3S)-configured product is formed, whereas attack from the si-face forms the (2S,3R)-configured product. Guided by this rule, mutants of LTA with improved diastereoselectivity of 99.2 %syn and 97.4 %anti were obtained.
L-苏氨酸醛缩酶的Prelog规则认为,当PLP-Gly的Cα阴离子从re-face攻击醛的羰基碳原子时,形成(2S ,3S)-构型产物,而攻击来自si面形成 (2 S ,3 R )-配置的产品。在此规则的指导下,获得了具有 99.2%顺式和 97.4%反的改进的非对映选择性的 LTA 突变体。