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Reprint of: Biogenesis of the cytochrome bc(1) complex and role of assembly factors.

Smith P.M., Fox J.L., Winge D.R.

The cytochrome bc(1) complex is an essential component of the electron transport chain in most prokaryotes and in eukaryotic mitochondria. The catalytic subunits of the complex that are responsible for its redox functions are largely conserved across kingdoms. In eukarya, the bc(1) complex contains supernumerary subunits in addition to the catalytic core, and the biogenesis of the functional bc(1) complex occurs as a modular assembly pathway. Individual steps of this biogenesis have been recently investigated and are discussed in this review with an emphasis on the assembly of the bc(1) complex in the model eukaryote Saccharomyces cerevisiae. Additionally, a number of assembly factors have been recently identified. Their roles in bc(1) complex biogenesis are described, with special emphasis on the maturation and topogenesis of the yeast Rieske iron-sulfur protein and its role in completing the assembly of functional bc(1) complex. This article is part of a Special Issue entitled: Biogenesis/Assembly of Respiratory Enzyme Complexes.

Biochim. Biophys. Acta 1817:872-882(2012) [PubMed] [Europe PMC]

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