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Review
. 2003 Jan 29;358(1429):255-66.
doi: 10.1098/rstb.2002.1192.

C-type cytochromes: diverse structures and biogenesis systems pose evolutionary problems

James W A Allen  1 , Oliver Daltrop, Julie M Stevens, Stuart J Ferguson
Affiliations
Review

C-type cytochromes: diverse structures and biogenesis systems pose evolutionary problems

James W A Allen et al. Philos Trans R Soc Lond B Biol Sci. .

Abstract

C-type cytochromes are a structurally diverse group of haemoproteins, which are related by the occurrence of haem covalently attached to a polypeptide via two thioether bonds formed by the vinyl groups of haem and cysteine side chains in a CXXCH peptide motif. Remarkably, three different post-translational systems for forming these cytochromes have been identified. The evolution of both the proteins themselves and the biogenesis systems poses many questions to which answers are currently being sought. In this article we review the progress that has been made in understanding the need for covalent attachment of haem to proteins in cytochromes c and the complex systems involved in their formation.

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