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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ten Brink, F. Baymann, F. Van Lis, R. Nitschke, W. Schoepp-cothenet, B. |
| Description | Author Affiliation: ten Brink F ( BIP/UMR7281, FR3479, CNRS/AMU, 13 chemin Joseph Aiguier, 13009 Marseille, France.) |
| Abstract | Most organisms contain a single Rieske/cyt b complex. This enzyme can be integrated in any respiratory or photosynthetic electron transfer chain that is quinone-based and sufficiently energy rich to allow for the turnover of three enzymes — a quinol reductase, a Rieske/cyt b complex and a terminal oxidase. Despite this universal usability of the enzyme a variety of phylogenetically distant organisms have multiple copies thereof and no reason for this redundancy is obvious. In this review we present an overview of the distribution of multiple copies among species and describe their properties from the scarce experimental results, analysis of their amino acid sequences and genomic context. We discuss the predicted redox properties of the Rieske cluster in relation to the nature of the pool quinone. It appears that acidophilic iron-oxidizing bacteria specialized one of their two copies for reverse electron transfer, archaeal Thermoprotei adapted their three copies to the interaction with different oxidases and several, phylogenetically unrelated species imported a second complex with a putative heme $c_{i}$ that may confer some yet to be determined properties to the complex. These hypothesis and all the more the so far completely unexplained cases call for further studies and we put forward a number of suggestions for future research that we hope to be stimulating for the field. This article is part of a Special Issue entitled: Respiratory complex III and related bc complexes. |
| ISSN | 00063002 |
| Journal | Biochimica et Biophysica Acta (BBA) - Reviews on Cancer |
| Issue Number | 11-12 |
| Volume Number | 1827 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2013-11-01 |
| Publisher Place | Netherlands |
| Access Restriction | Open |
| Subject Keyword | Archaeal Proteins Genetics Bacterial Proteins Cytochromes b Electron Transport Complex III Archaea Classification Metabolism Bacteria Benzoquinones Oxidation-Reduction Phylogeny Species Specificity Biochemistry |
| Content Type | Text |
| Resource Type | Article |
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