By constructing an in vivo-assembled, catalytically proficient peroxidase, C45, we have recently demonstrated the catalytic potential of simple, de novo-designed heme proteins. Here, we show that C45's enzymatic activity extends to the efficient and stereoselective intermolecular transfer of carbenes to olefins, heterocycles, aldehydes, and amines. Not only is this a report of carbene transferase activity in a completely de novo protein, but also of enzyme-catalyzed ring expansion of aromatic heterocycles via carbene transfer by any enzyme.

中文翻译：

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从头过氧化物酶也是一种混杂但立体选择性的卡宾转移酶。

通过构建体内组装的、催化能力强的过氧化物酶 C45，我们最近证明了简单的、从头设计的血红素蛋白的催化潜力。在这里，我们展示了 C45 的酶活性延伸到卡宾到烯烃、杂环、醛和胺的高效和立体选择性分子间转移。这不仅是关于完全从头蛋白质中卡宾转移酶活性的报告，而且是通过任何酶的卡宾转移酶催化芳族杂环扩环的报告。