Substrate activation by iron superoxo intermediates.
Substrate activation by iron superoxo intermediates.
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DOI:
10.1016/j.sbi.2010.08.005
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发表时间:
2010-12
影响因子:
6.8
通讯作者:
Bollinger JM Jr
中科院分区:
文献类型:
--
作者:
van der Donk WA;Krebs C;Bollinger JM Jr
A growing number of non-heme-iron oxygenases and oxidases catalyze reactions for which the well-established mechanistic paradigm involving a single C-H-bond cleaving intermediate of the Fe(IV)-oxo (ferryl) type is insufficient to explain the chemistry. It is becoming clear that, in several of these cases, Fe(III)-superoxide complexes formed by simple addition of O2 to the reduced [Fe(II)] cofactor initiate substrate oxidation by abstracting hydrogen. This substrate-oxidizing entry route into high-valent-iron intermediates makes possible an array of complex and elegant oxidation reactions without consumption of valuable reducing equivalents. Examples of this novel mechanistic strategy are discussed with the goal of bringing forth unifying principles.
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