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Structural and Functional Studies of the Cytochrome bc Complex from Photosynthetic Purple Bacteria

Authored by: Fei Zhou , Lothar Esser , Chang-An Yu , Di Xia

Handbook of Photosynthesis

Print publication date:  March  2016
Online publication date:  April  2016

Print ISBN: 9781482230734
eBook ISBN: 9781482230758
Adobe ISBN:

10.1201/b19498-26

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Abstract

As part of the mitochondrial respiratory chain and the photosynthetic apparatus of nonoxygenic purple bacteria, the cytochrome bc 1 complex couples the oxidation of quinol to proton translocation across the membrane, contributing to the proton motive force essential for a variety of cellular activities such as ATP synthesis. With the accumulation of information from biochemical, genetic, and structural investigations, an understanding of the mechanism by which the complex performs its biological function and the way it is inhibited has been obtained at an unprecedented level of detail. With their unique genetic background, photosynthetic bacteria afford an indispensible and convenient system that has been used extensively in functional and structural studies of the cytochrome bc 1 complex. In this chapter, we review contributions from many laboratories including our own and point out certain challenges that lie ahead.

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