Search Results
Overview
| Uniprot ID | P19536 |
|---|---|
| Protein Name | Cytochrome c oxidase subunit 5B, mitochondrial |
| Gene Name | Cox5b |
| Organism | Mus musculus |
Kla Sites from experimental identification
| Position | Flanking peptide |
|---|---|
| 67 | PYNMLPPKAASGTKE |
| 73 | PKAASGTKEDPNLVP |
| 85 | LVPSISNKRIVGCIC |
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 Sequence
Gene Ontology
| Classification | GO ID | Description |
|---|---|---|
| Cellular Component | GO:0001669 | acrosomal vesicle |
| Cellular Component | GO:0005743 | mitochondrial inner membrane |
| Cellular Component | GO:0031966 | mitochondrial membrane |
| Cellular Component | GO:0005739 | mitochondrion |
| Cellular Component | GO:0043209 | myelin sheath |
| Cellular Component | GO:0045277 | respiratory chain complex IV |
| Molecular Function | GO:0046872 | metal ion binding |
| Biological Process | GO:0006123 | mitochondrial electron transport, cytochrome c to oxygen |
Reference
[1] Chang J, Wu W, Qian P, Lu Z, He X et al.. Multi-omics study on the effect of moderate-intensity exercise on protein lactylation in mouse muscle tissue.. Front Cell Dev Biol 12:1472338. 2024. PMID: 39935788.
[2] Zhuo W, Zhang M, Tan J, Gao Y, Wang Y et al.. Lysine lactylation analysis of proteins in the heart of the Kawasaki disease mouse model.. Front Cell Dev Biol 13:1550220. 2025. PMID: 40114965.
[3] Wu D, Tang Y, Li X, Xiong S, Zhang Z et al.. Characterization of protein lactylation in healthy and ischemic mouse hearts.. Front Cardiovasc Med 12:1644886. 2025. PMID: 41089239.