A0A515L403 · A0A515L403_9STRA
- ProteinCytochrome c oxidase subunit 1
- GeneCOX1
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids191 (go to sequence)
- Protein existenceInferred from homology
- Annotation score2/5
Function
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.
Catalytic activity
- 4 Fe(II)-[cytochrome c] + O2 + 8 H+(in) = 4 Fe(III)-[cytochrome c] + 2 H2O + 4 H+(out)
4 RHEA-COMP:10350 + CHEBI:15379 + 8 H+ (in)CHEBI:15378= 4 RHEA-COMP:14399 + 2 CHEBI:15377 + 4 H+ (out)CHEBI:15378
Pathway
Energy metabolism; oxidative phosphorylation.
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | mitochondrial inner membrane | |
Molecular Function | cytochrome-c oxidase activity | |
Molecular Function | heme binding | |
Molecular Function | metal ion binding | |
Biological Process | electron transport coupled proton transport | |
Biological Process | mitochondrial electron transport, cytochrome c to oxygen |
Keywords
- Molecular function
- Biological process
- Ligand
Enzyme and pathway databases
Names & Taxonomy
Protein names
- Recommended nameCytochrome c oxidase subunit 1
- EC number
Gene names
Encoded on
- Mitochondrion
Organism names
- Organism
- Strains
- Taxonomic lineageEukaryota > Sar > Stramenopiles > Ochrophyta > Bacillariophyta > Bacillariophyceae > Bacillariophycidae > Bacillariales > Bacillariaceae > Cylindrotheca
Accessions
- Primary accessionA0A515L403
Subcellular Location
UniProt Annotation
GO Annotation
Mitochondrion inner membrane ; Multi-pass membrane protein
Features
Showing features for transmembrane.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Transmembrane | 33-54 | Helical | |||
Transmembrane | 75-97 | Helical | |||
Transmembrane | 117-142 | Helical | |||
Transmembrane | 154-181 | Helical | |||
Keywords
- Cellular component
Structure
Sequence
- Sequence statusFragment
- Length191
- Mass (Da)20,916
- Last updated2019-10-16 v1
- ChecksumED2EFC794BB86253
Features
Showing features for non-terminal residue.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Non-terminal residue | 1 | ||||
Non-terminal residue | 191 | ||||
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
MH819220 EMBL· GenBank· DDBJ | QDM38691.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MH819221 EMBL· GenBank· DDBJ | QDM38692.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MH819222 EMBL· GenBank· DDBJ | QDM38693.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MH819225 EMBL· GenBank· DDBJ | QDM38696.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MH819228 EMBL· GenBank· DDBJ | QDM38699.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MH819229 EMBL· GenBank· DDBJ | QDM38700.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MH819230 EMBL· GenBank· DDBJ | QDM38701.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MH819231 EMBL· GenBank· DDBJ | QDM38702.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MH819232 EMBL· GenBank· DDBJ | QDM38703.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MH819233 EMBL· GenBank· DDBJ | QDM38704.1 EMBL· GenBank· DDBJ | Genomic DNA |