Catalytic reduction of O2 by cytochrome C using a synthetic model of cytochrome C oxidase.

Catalytic reduction of O2 by cytochrome C using a synthetic model of cytochrome C oxidase.
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DOI:
10.1021/ja9001579
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发表时间:
2009-04-15
影响因子:
15
通讯作者:
Yang Y
Yang Y
中科院分区:
化学1区
文献类型:
--
作者:
Collman JP;Ghosh S;Dey A;Decréau RA;Yang Y

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细胞色素c氧化酶(CcO)催化氧的四电子还原为水,单电子还原剂细胞色素c(Cytc)是电子的来源。最近,我们报道了CcO的功能模型,其电化学催化O2到H2O的四电子还原(Collman et. Science,2007,315,1565)。目前的论文表明,相同的功能CcO模型将催化四电子还原O2使用实际的生物还原剂Cytc在均匀的溶液中。单一和稳态营业额动力学研究表明,O2结合是速率决定和O-O键裂解和电子转移从还原的Cytc的氧化模型复杂的相对较快。
Cytochrome c oxidase (CcO) catalyzes the four-electron reduction of oxygen to water, the one-electron reductant Cytochrome c (Cytc) being the source of electrons. Recently we reported a functional model of CcO that electrochemically catalyzes the four-electron reduction of O2 to H2O (Collman et. al. Science, 2007, 315, 1565). The current paper shows that the same functional CcO model will catalyze the four-electron reduction of O2 using the actual biological reductant Cytc in a homogeneous solution. Both single and steady-state turnover kinetic studies indicate that O2 binding is rate determining and O-O bond cleavage and electron transfer from reduced Cytc to the oxidized model complex are relatively fast.
DOI: 10.1038/376660a0
发表时间: 1995-08-24
期刊: NATURE
影响因子: 64.8
作者:
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