v5.1.0.3
Cicer data from the Legume Information System
Type | Family |
Description | Cytochrome c oxidase ( ) [ , ] is an oligomeric enzymatic complex which is a component of the respiratory chain 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. The number of polypeptides in the complex ranges from 3-4 (prokaryotes), up to 13 (mammals). In Archaea, a cytochrome-c-type oxidase from Natronobacterium (cytochrome ba3) has been shown to consists of four subunits [].Subunit 2 (CO II) transfers the electrons from cytochrome c to the catalytic subunit 1. It contains two adjacent transmembrane regions in its N terminus and the major part of the protein is exposed to the periplasmic or to the mitochondrial intermembrane space, respectively. CO II provides the substrate-binding site and contains a copper centre called Cu(A), probably the primary acceptor in cytochrome c oxidase. An exception is the corresponding subunit of the cbb3-type oxidase which lacks the copper A redox-centre. Several bacterial CO II have a C-terminal extension that contains a covalently bound haem c. |
Short Name | CcO_II |