| Post Translational Modifications | In response to mitochondrial stress, the precursor protein is ubiquitinated by the SIFI complex in the cytoplasm before mitochondrial import, leading to its degradation. Within the SIFI complex, UBR4 initiates ubiquitin chain that are further elongated or branched by KCMF1. |
| Function | Component of the cytochrome c oxidase, the last enzyme in the mitochondrial electron transport chain which drives oxidative phosphorylation. The respiratory chain contains 3 multisubunit complexes succinate dehydrogenase (complex II, CII), ubiquinol-cytochrome c oxidoreductase (cytochrome b-c1 complex, complex III, CIII) and cytochrome c oxidase (complex IV, CIV), that cooperate to transfer electrons derived from NADH and succinate to molecular oxygen, creating an electrochemical gradient over the inner membrane that drives transmembrane transport and the ATP synthase. Cytochrome c oxidase is the component of the respiratory chain that catalyzes the reduction of oxygen to water. Electrons originating from reduced cytochrome c in the intermembrane space (IMS) are transferred via the dinuclear copper A center (CU(A)) of subunit 2 and heme A of subunit 1 to the active site in subunit 1, a binuclear center (BNC) formed by heme A3 and copper B (CU(B)). The BNC reduces molecular oxygen to 2 water molecules using 4 electrons from cytochrome c in the IMS and 4 protons from the mitochondrial matrix. |
| Protein Name | Cytochrome C Oxidase Subunit 5a - MitochondrialCytochrome C Oxidase Polypeptide Va |
| Database Links | Reactome: R-HSA-5628897Reactome: R-HSA-611105Reactome: R-HSA-9707564Reactome: R-HSA-9837999Reactome: R-HSA-9864848 |
| Cellular Localisation | Mitochondrion Inner MembranePeripheral Membrane ProteinMatrix Side |
| Alternative Antibody Names | Anti-Cytochrome C Oxidase Subunit 5a - Mitochondrial antibodyAnti-Cytochrome C Oxidase Polypeptide Va antibodyAnti-COX5A antibody |
Information sourced from Uniprot.org
