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Annu Rev Biochem. 2000;69:1005-75.

Structure and function of cytochrome bc complexes.

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1
Physical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA. EABerry@LBL.gov

Abstract

The cytochrome bc complexes represent a phylogenetically diverse group of complexes of electron-transferring membrane proteins, most familiarly represented by the mitochondrial and bacterial bc1 complexes and the chloroplast and cyanobacterial b6f complex. All these complexes couple electron transfer to proton translocation across a closed lipid bilayer membrane, conserving the free energy released by the oxidation-reduction process in the form of an electrochemical proton gradient across the membrane. Recent exciting developments include the application of site-directed mutagenesis to define the role of conserved residues, and the emergence over the past five years of X-ray structures for several mitochondrial complexes, and for two important domains of the b6f complex.

[Indexed for MEDLINE]

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