ELECTRON-TRANSFER BETWEEN CYTOCHROME-C AND CYTOCHROME-C PEROXIDASE

被引：35

作者：

MILLETT, F ^{[1
]}

MILLER, MA ^{[1
]}

GEREN, L ^{[1
]}

DURHAM, B ^{[1
]}

机构：

[1] UNIV CALIF SAN DIEGO,DEPT CHEM,LA JOLLA,CA 92093

来源：

JOURNAL OF BIOENERGETICS AND BIOMEMBRANES | 1995年 / 27卷 / 03期

关键词：

ELECTRON TRANSFER; CYTOCHROME C; CYTOCHROME C PEROXIDASE; RUTHENIUM;

D O I：

10.1007/BF02110103

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

The reaction between cytochrome c (CC) and cytochrome c peroxidase (CcP) is a very attractive system for investigating the fundamental mechanism of biological electron transfer. The resting ferric state of CcP is oxidized by hydrogen peroxide to compound I (CMPI) containing an oxyferryl heme and an indolyl radical cation on Trp-191. CMPI is sequentially reduced to CMPII and then to the resting state CcP by two molecules of CC. In this review we discuss the use of a new ruthenium photoreduction technique and other rapid kinetic techniques to address the following important questions: (1) What is the initial electron acceptor in CMPI? (2) What are the true rates of electron transfer from CC to the radical cation and to the oxyferryl heme? (3) What are the binding domains and pathways for electron transfer from CC to the radical cation and the oxyferryl heme? (4) What is the mechanism for the complete reaction under physiological conditions?

引用

页码：341 / 351

页数：11

共 53 条

[1] TUNNELING PATHWAY AND REDOX-STATE-DEPENDENT ELECTRONIC COUPLINGS AT NEARLY FIXED DISTANCE IN ELECTRON-TRANSFER PROTEINS [J].