细胞色素c与金属六氰化物配合物之间的电子转移。热力学驱动力对电子转移速率的影响。

Electron transfer between cytochrome c and metal hexacyanide complexes. Effect of thermodynamic driving force on the electron transfer rate.

作者信息

Cho K C, Chu W F, Choy C L, Che C M

机构信息

Department of Physics, Chinese University of Hong Kong.

出版信息

Biochim Biophys Acta. 1989 Jan 26;973(1):53-8. doi: 10.1016/s0005-2728(89)80402-5.

DOI:10.1016/s0005-2728(89)80402-5

PMID:2536552

Abstract

The electron transfer reactions between ferrocytochrome c and three isomorphic hexacyanide complexes, [Fe(CN)6]3-, [Os(CN)6]3- and [Ru(CN)6]3-, have been studied using the method of photoexcitation. The transfer rates for [Os(CN)6]3- and [Ru(CN)6]3- are, respectively, about 45- and 200-times higher than that of [Fe(CN)6]3-. A reorganization energy of approx. 0.8 eV was found for the cytochrome c-hexacyanide system when the data were analyzed according to the theory of Marcus.

摘要

利用光激发方法研究了亚铁细胞色素c与三种同构六氰化物配合物[Fe(CN)₆]³⁻、[Os(CN)₆]³⁻和[Ru(CN)₆]³⁻之间的电子转移反应。[Os(CN)₆]³⁻和[Ru(CN)₆]³⁻的转移速率分别比[Fe(CN)₆]³⁻高约45倍和200倍。根据马库斯理论分析数据时，发现细胞色素c-六氰化物体系的重组能约为0.8电子伏特。