The trisubstituted enolate- and C–C bond-forming capacities of engineered carboxymethylproline synthases CMPSs are coupled with the malonyl-CoA synthetase MatB to enable stereoselective preparation of 5- and 6-membered N-heterocycles functionalised with alkyl-substituted carboxymethyl side chains, starting from achiral alkyl-substituted malonic acids and L-amino acid semialdehydes. The results illustrate the biocatalytic utility of crotonases in tandem enzyme-catalysed reactions for stereoselective synthesis.
工程化羧甲基脯
氨酸合酶(
CMPS)具有三取代烯醇化和C-C键形成能力,与丙二酰-CoA合成酶MatB偶联,可实现从非手性烷基取代的
丙二酸和L-
氨基酸半醛出发,选择性制备带有烷基取代羧甲基侧链的5-和6-元N-杂环。这些结果展示了利用裂解酶在串联酶催化反应中进行选择性合成
生物催化的实用性。