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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >X-ray absorption spectroscopy of chloroperoxidase compound I: Insight into the reactive intermediate of P450 chemistry.
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X-ray absorption spectroscopy of chloroperoxidase compound I: Insight into the reactive intermediate of P450 chemistry.

机译:氯过氧化物酶I的X射线吸收光谱:洞悉P450化学反应的中间体。

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摘要

We report the structural characterization of a thiolate-ligated ferryl radical. Using x-ray absorption spectroscopy, we examined chloroperoxidase (CPO) compound I (CPO-I). Our results indicate that CPO-I is an authentic ferryl species with an Fe-O bond of 1.65 A. Axial-ligand interactions result in a remarkably long 2.48-A Fe-S bond. Analogous forms of cytochrome P450 and CPO have been shown to possess virtually identical coordination environments. Thus, it seems likely that our findings provide a good structural description of the elusive P450-I.
机译:我们报告了硫醇盐连接的基团的结构表征。使用X射线吸收光谱,我们检查了氯过氧化物酶(CPO)化合物I(CPO-1)。我们的结果表明,CPO-I是具有1.65 A的Fe-O键的正宗小轮物种。轴向-配体相互作用导致2.48-A Fe-S键非常长。已经证明,细胞色素P450和CPO的相似形式具有几乎相同的配位环境。因此,我们的发现似乎提供了难以捉摸的P450-I的良好结构描述。

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