Monoterpene hydroxylation with an artificial self-sufficient P450 utilizing a P450SMO reductase domain for the electron transfer
作者:Zheng-Jiao Luan、Yue-Cai Yin、Ai-Tao Li、Hui-Lei Yu、Jian-He Xu
DOI:10.1016/j.molcatb.2015.02.006
日期:2015.6
Rhodococcus sp. ECU0066 is a natural self-sufficient P450 monooxygenase, consisting of a heme domain, a flavin-reductase domain containing FMN and NADPH binding sites, and a [Fe2S2] ferredoxin domain. P450cam catalyzes the hydroxylation of camphor to 5-exo-hydroxycamphor. The variant P450cam (Y96F/V247L) was reported for the oxidation of monoterpene by protein engineering. In this work, we constructed an
细胞色素P450 SMO从红球菌属。ECU0066是一种天然的自给自足的P450单加氧酶,由血红素结构域,含有FMN和NADPH结合位点的黄素还原酶结构域以及[Fe 2 S 2 ]铁氧还蛋白结构域组成。P450凸轮可将樟脑羟基化为5-exo-hydroxy樟脑。据报道,变体P450 cam(Y96F / V247L)可通过蛋白质工程技术氧化单萜。在这项工作中,我们通过将P450 SMO还原酶结构域和P450 cam(Y96F / V247L)域与一个连接子区域(G 4 S)连接在一起,构建了一个人工自给自足的P450型单萜羟化酶。4。所得的嵌合P450酶可催化(-)-柠檬烯和α- pine烯以及樟脑的羟基化作用,而这些酶对天然融合蛋白P450 SMO均无活性。融合的P450与葡萄糖脱氢酶(GDH)的共表达改善了(-)-柠檬烯的转化率,因为在以葡萄糖为共底物的体系中可以再生出足够的NADPH。这项工作表明,P450