GyrI-like proteins catalyze cyclopropanoid hydrolysis to confer cellular protection.

GyrI-like proteins catalyze cyclopropanoid hydrolysis to confer cellular protection.
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GyrI 样蛋白催化环丙烷水解以提供细胞保护

DOI:
10.1038/s41467-017-01508-1
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发表时间:
2017-11-14
影响因子:
16.6
通讯作者:
Tang GL
Tang GL
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Yuan H;Zhang J;Cai Y;Wu S;Yang K;Chan HCS;Huang W;Jin WB;Li Y;Yin Y;Igarashi Y;Yuan S;Zhou J;Tang GL

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GyrI样蛋白广泛存在于原核生物和真核生物中,是一种小分子结合蛋白。在这里,我们确定了这些蛋白质的一个亚家族作为环丙烷环丙基水解酶(CCHs),可以催化水解的有效的DNA烷基化剂Yatakemycin(YTM)和CC-1065。共晶体学和分子动力学模拟分析表明,这些CCHs共享一个保守的芳香笼的水解活性。随后的细胞毒性试验证实,CCH能够保护细胞免受YTM的侵害。因此,我们的研究结果表明,进化上保守的GyrI样蛋白质赋予细胞保护,不仅通过结合,但也催化不同的外源性物质。
GyrI-like proteins are widely distributed in prokaryotes and eukaryotes, and recognized as small-molecule binding proteins. Here, we identify a subfamily of these proteins as cyclopropanoid cyclopropyl hydrolases (CCHs) that can catalyze the hydrolysis of the potent DNA-alkylating agents yatakemycin (YTM) and CC-1065. Co-crystallography and molecular dynamics simulation analyses reveal that these CCHs share a conserved aromatic cage for the hydrolytic activity. Subsequent cytotoxic assays confirm that CCHs are able to protect cells against YTM. Therefore, our findings suggest that the evolutionarily conserved GyrI-like proteins confer cellular protection against diverse xenobiotics via not only binding, but also catalysis.
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作者:
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