Comparative Study
doi: 10.1016/0014-5793(90)80958-l.
RNA sequence and the nature of the CuA-binding site in cytochrome c oxidase
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- PMID: 1696552
- DOI: 10.1016/0014-5793(90)80958-l
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Comparative Study
RNA sequence and the nature of the CuA-binding site in cytochrome c oxidase
FEBS Lett.
.
Free article
Abstract
For cytochrome c oxidase subunit II (COXII), DNA and protein sequences suggest that Met-207 (bovine numbering) is conserved in all species except plants. Sequencing of plant mitochondrial COXII mRNAs now indicates that Met-207 is also conserved among plants as a result of a C-to-U type of RNA editing. Considering the strict evolutionary conservation of Met-207 and the homology of COXII to type I (blue) copper proteins and nitrous oxide reductase, we propose a model in which Met-207 is associated with the CuA-binding site (along with Cys-196, Cys-200 and His-204) and plays a role in determining its reduction potential and stability.
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