Redesign of the Phosphate Binding Site of L-Rhamnulose- 1-Phosphate Aldolase towards a Dihydroxyacetone Dependent Aldolase
作者:Xavier Garrabou、Jesús Joglar、Teodor Parella、Ramon Crehuet、Jordi Bujons、Pere Clapés
DOI:10.1002/adsc.201000719
日期:2011.1.10
The aldol addition of unphosphorylated dihydroxyacetone (DHA) to aldehydes catalyzed by L‐rhamnulose‐1‐phosphate aldolase (RhuA), a dihydroxyacetone phosphate‐dependent aldolase, is reported. Moreover, a single point mutation in the phosphate binding site of the RhuA wild type, that is, substitution of aspartate for asparagine at position N29, increased by 3‐fold the of aldol addition reactions of
据报道,由L-鼠李糖-1-磷酸醛缩酶(RhuA)(一种依赖于磷酸二羟基丙酮的醛缩酶)催化的醛基中的未磷酸化二羟基丙酮(DHA)醛缩醛加成反应。此外,RhuA野生型磷酸结合位点的单点突变,即在N29位用天冬氨酸取代天冬酰胺,使DHA与其他醛受体而不是天然L的羟醛加成反应增加了3倍。丙醛 RhuA N29D突变体修改了天然底物的最佳酶设计,并改变了其催化性能,使醛缩酶比其他添加DHA的醛缩酶更具通用性。