Substrate Specificity for the Epoxidation of Terpenoids and Active Site Topology of House Fly Cytochrome P450 6A1
作者:John F. Andersen、Jennifer K. Walding、Philip H. Evans、William S. Bowers、René Feyereisen
DOI:10.1021/tx9601162
日期:1997.2.1
methoprene. The four geometric isomers of methyl farnesoate were metabolized predominantly to the 10,11-epoxides, but also the 6,7-epoxides and to the diepoxides. The 10,11-epoxide of methyl (2E,6E)-farnesoate was produced in a 3:1 ratio of the (10S) and (10R) enantiomers. Monoepoxides of methyl farnesoate were metabolized efficiently to the diepoxides. Methyl farnesoate epoxidation was strongly inhibited
大肠杆菌中的异源表达,纯化和家蝇P450 6A1的重组以及NADPH-细胞色素P450还原酶用于研究类萜的代谢。除环氧化烯杀虫剂的环氧化外,先前已证明[Andersen等。(1994)Biochemistry 33,2171-2177],该细胞色素P450被证明可以环氧化多种萜类化合物,例如法呢基酯,香叶基酯和神经基甲基酯,少年激素I和III,以及法呢醛而不是法呢醇或法呢酸。用NADPH-细胞色素P450还原酶和磷脂酰胆碱重构的P450 6A1不会代谢昆虫生长调节剂戊二烯和甲基丁二烯的α-pine烯,柠檬烯。法尼酸甲酯的四个几何异构体主要代谢为10,11-环氧化物,但也代谢为6,7-环氧化物和二环氧化物。(2E,6E)-法尼松酸酯的10,11-环氧化合物以(10S)和(10R)对映体的3:1比例生成。法呢酸甲酯的单环氧化物被有效地代谢为二环氧化物。大量取代的咪唑强烈抑制了法呢酸甲酯的环氧化