Substrate engineered, achiral carboxylic acid derivative 2 was biohydroxylated with various mutants of cytochrome P450 BM-3 to give two out of the four possible diastereoisomers in high de and ee. The BM-3 mutants exhibit up to 9200 total turnovers for hydroxylation of the engineered substrate, which without the protecting group is not transformed by this enzyme.
通过
生物羟基化,将底物工程化的无手性
羧酸衍
生物2与细胞色素P450 BM-3的各种突变体结合,在四种可能的非对映异构体中,有二种异构体的对映选择性(de)和立体选择性(ee)较高。BM-3突变体对工程化底物的羟基化总转化率高达9200,而如果没有保护基团,这种酶就无法对其进行转化。