| Literature DB >> 7832587 |
Abstract
The structural features of cytochrome oxidases are reviewed in light of their evolution. The substrate specificity (quinol vs. cytochrome c) is reflected in the presence of a unique copper centre (CuA) in cytochrome c oxidases. In several lines of evolution, quinol oxidases have independently lost this copper. Also, the most primitive cytochrome c oxidases do not contain this copper, and electron entry takes place via c-type haems. These enzymes, exemplified by the rhizobial FixN complex, probably remind the first oxidases. They are related to the denitrification enzyme nitric oxide reductase.Entities:
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Year: 1994 PMID: 7832587 DOI: 10.1007/bf00872214
Source DB: PubMed Journal: Antonie Van Leeuwenhoek ISSN: 0003-6072 Impact factor: 2.271