Extracytoplasmic prosthetic group ligation to apoproteins: maturation of c-type cytochromes |
| |
Authors: | Turkarslan Serdar Sanders Carsten Daldal Fevzi |
| |
Affiliation: | University of Pennsylvania, Department of Biology, Plant Science Institute, Philadelphia, PA 19104, USA. |
| |
Abstract: | In all organisms, haem is post-translationally and covalently attached to c apocytochromes to produce c holocytochromes via a process called c-type cytochromes maturation, which involves numerous components. In bacteria it was not clear which of these components catalyses the extracytoplasmic haem-apocytochrome ligation per se. In this issue of Molecular Microbiology, Feissner and colleagues report that a single polypeptide from Helicobacter pylori, corresponding to the fusion of two proteins found in other organisms, performs haem ligation to a coexpressed Bordetella pertussis apocytochrome c in an Escherichia coli mutant lacking its own cytochrome c maturation proteins. This simple experimental system pinpoints the components catalysing extracytoplasmic covalent haem ligation and raises intriguing issues about the requirements for delivery of haem and apocytochrome c substrates to produce c holocytochromes. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|