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- * Cytochrome c oxidase subunit Vb, zinc binding region signature *
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-
- Cytochrome c oxidase (EC 1.9.3.1) [1] is an oligomeric enzymatic complex which
- is a component of the respiratory chain complex and is involved in the
- transfer of electrons from cytochrome c to oxygen. In eukaryotes this enzyme
- complex is located in the mitochondrial inner membrane; in aerobic prokaryotes
- it is found in the plasma membrane. In addition to the three large subunits
- that form the catalytic center of the enzyme complex there are, in eukaryotes,
- a variable number of small polypeptidic subunits. One of these subunits which
- is known as Vb in mammals, V in slime mold and IV in yeast, binds a zinc atom.
- The sequence of subunit Vb is well conserved and includes three conserved
- cysteines that are thought to coordinate the zinc ion [2]. Two of these
- cysteines are clustered in the C-terminal section of the subunit; we have used
- this region as a signature pattern.
-
- -Consensus pattern: [LIVM](2)-[FYW]-x(10)-C-x(2)-C-G-x(2)-[FY]-K-L
- [The two C's probably bind zinc]
- -Sequences known to belong to this class detected by the pattern: ALL.
- -Other sequence(s) detected in SWISS-PROT: NONE.
- -Last update: October 1993 / First entry.
-
- [ 1] Capaldi R.A., Malatesta F., Darley-Usmar V.M.
- Biochim. Biophys. Acta 726:135-148(1983).
- [ 2] Rizzuto R., Sandona D., Brini M., Capaldi R.A., Bisson R.
- Biochim. Biophys. Acta 1129:100-104(1991).
-