Peroxo and oxo intermediates in mononuclear nonheme iron enzymes and related active sites.

Peroxo and oxo intermediates in mononuclear nonheme iron enzymes and related active sites.
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DOI:
10.1016/j.cbpa.2009.02.011
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发表时间:
2009-02
影响因子:
7.8
通讯作者:
Chow, Marina S.
Chow, Marina S.
中科院分区:
生物学2区
文献类型:
--
作者:
Solomon, Edward I.;Wong, Shaun D.;Liu, Lei V.;Decker, Andrea;Chow, Marina S.

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FeIII-OOH和FeIV=O中间体现在已经在一些非血红素铁活性部位被记录下来。在这个观点中,我们使用光谱结合电子结构计算来定义这些物种的前线分子轨道(FMO)及其对反应活性的贡献。对于活化的博莱霉素中的低自旋FeIII-OHO物种,我们发现这种非血红素铁中间体的反应活性与细胞色素P450的类似化合物0有很大的不同。对于FeIV=O S=1模型物种,我们从实验上定义了电子结构及其对反应活性的贡献,并通过计算评估了在非血红素铁酶中发现的FeIV=O S=2中间体的电子结构将如何变化。
FeIII–OOH and FeIV=O intermediates have now been documented in a number of non-heme iron active sites. In this Opinion we use spectroscopy combined with electronic structure calculations to define the frontier molecular orbitals (FMOs) of these species and their contributions to reactivity. For the low-spin FeIII–OOH species in activated bleomycin we show that the reactivity of this non-heme iron intermediate is very different from that of the analogous Compound 0 of cytochrome P450. For FeIV=O S = 1 model species we experimentally define the electronic structure and its contribution to reactivity, and computationally evaluate how this would change for the FeIV=O S = 2 intermediates found in non-heme iron enzymes.
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