Repurposing a Nitric Oxide Transport Hemoprotein Nitrophorin 2 for Olefin Cyclopropanation
作者:Shunzhi Huang、Wen-Hao Deng、Rong-Zhen Liao、Chunmao He
DOI:10.1021/acscatal.2c03515
日期:2022.11.4
repurposed for catalyzing abiological carbene transfer reactions. Herein, we rationally designed an engineered variant of nitrophorin 2 (NP2)─a nitric oxide transport hemoprotein─that catalyzes olefin cyclopropanation with high activity and stereoselectivity. Being a β-barrel protein, the engineered NP2 variant showed a unique substrate preference, in contrast to the mainstream α-helical carbene-transfer
越来越多的血红素蛋白最近被重新用于催化非生物卡宾转移反应。在这里,我们合理地设计了一种工程化的 nitrophorin 2 (NP2)——一种一氧化氮转运血红蛋白——以高活性和立体选择性催化烯烃环丙烷化。作为一种 β-桶蛋白,工程 NP2 变体显示出独特的底物偏好,与主流的 α-螺旋卡宾转移血红素酶(如细胞色素 P450 酶和肌红蛋白)形成对比。催化反应可以在制备规模上进行,同时保持立体选择性。量子化学计算进一步支持了 NP2 催化的苯乙烯环丙烷化的立体选择性,并阐明了关键残基的重要性。像这样,