| First Author | Allen JW | Year | 2011 |
| Journal | FEBS J | Volume | 278 |
| Issue | 22 | Pages | 4198-216 |
| PubMed ID | 21736702 | Mgi Jnum | J:192079 |
| Mgi Id | MGI:5463883 | Doi | 10.1111/j.1742-4658.2011.08231.x |
| Citation | Allen JW (2011) Cytochrome c biogenesis in mitochondria--Systems III and V. FEBS J 278(22):4198-216 |
| abstractText | In c-type cytochromes, heme becomes covalently attached to the polypeptide chain by a reaction between the vinyl groups of the heme and cysteine thiols from the protein. There are two such cytochromes in mitochondria: cytochrome c and cytochrome c(1). The heme attachment is a post-translational modification that is catalysed by different biogenesis proteins in different organisms. Three types of biogenesis system are found or predicted in mitochondria: System I (the cytochrome c maturation system); System III (termed holocytochrome c synthase (HCCS) or heme lyase); and System V. This review focuses primarily on cytochrome c maturation in mitochondria containing HCCS (System III). It describes what is known about the enzymology and substrate specificity of HCCS; the role of HCCS in human disease; import of HCCS into mitochondria; import of apocytochromes c and c(1) into mitochondria and the close relationships with HCCS-dependent heme attachment; and the role of the fungal cytochrome c biogenesis accessory protein Cyc2. System V is also discussed; this is the postulated mitochondrial cytochrome c biogenesis system of trypanosomes and related organisms. No cytochrome c biogenesis proteins have been identified in the genomes of these organisms whose c-type cytochromes also have a unique mode of heme attachment. |
