Biosynthesis of Indole Diterpene Lolitrems: Radical‐Induced Cyclization of an Epoxyalcohol Affording a Characteristic Lolitremane Skeleton
作者:Yulu Jiang、Taro Ozaki、Mei Harada、Tadachika Miyasaka、Hajime Sato、Kazunori Miyamoto、Junichiro Kanazawa、Chengwei Liu、Jun‐ichi Maruyama、Masaatsu Adachi、Atsuo Nakazaki、Toshio Nishikawa、Masanobu Uchiyama、Atsushi Minami、Hideaki Oikawa
DOI:10.1002/anie.202007280
日期:2020.10.5
Lolitrems are tremorgenic indole diterpenes that exhibit a unique 5/6 bicyclic system of the indole moiety. Although genetic analysis has indicated that the prenyltransferase LtmE and the cytochrome P450 LtmJ are involved in the construction of this unique structure, the detailed mechanism remains to be elucidated. Herein, we report the reconstitution of the biosynthetic pathway for lolitrems employing
Lolitrems是震颤的吲哚二萜,其吲哚部分具有独特的5/6双环系统。尽管遗传分析表明异戊二烯基转移酶LtmE和细胞色素P450 LtmJ参与了这种独特结构的构建,但详细的机制仍有待阐明。本文中,我们报道了针对表达宿主米曲霉的基因组编辑技术,最近建立了lolitrems生物合成途径的重构。各种中间体的异源表达和生物转化表明LtmJ催化多步氧化以提供lolitrem核心。我们还分离了关键的反应中间体与环氧醇部分。该观察结果使我们能够建立自由基诱导的环化反应的机理,该机理得到密度泛函理论计算和带有合成类似物的模型实验的有力支持。