B9ULF5 · B9ULF5_9CICH
- ProteinCytochrome c oxidase subunit 1
- GeneCOI
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids217 (go to sequence)
- Protein existenceInferred from homology
- Annotation score3/5
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)This reaction proceeds in the forward direction.
4 RHEA-COMP:10350 + CHEBI:15379 + 8 H+ (in)CHEBI:15378= 4 RHEA-COMP:14399 + 2 CHEBI:15377 + 4 H+ (out)CHEBI:15378
Cofactor
Protein has several cofactor binding sites:
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
- Taxonomic lineageEukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Actinopterygii > Neopterygii > Teleostei > Neoteleostei > Acanthomorphata > Ovalentaria > Cichlomorphae > Cichliformes > Cichlidae > New World cichlids > Cichlasomatinae > Heroini > Petenia
Accessions
- Primary accessionB9ULF5
Subcellular Location
UniProt Annotation
GO Annotation
Mitochondrion inner membrane ; Multi-pass membrane protein
Features
Showing features for transmembrane.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Transmembrane | 6-24 | Helical | |||
Transmembrane | 36-58 | Helical | |||
Transmembrane | 92-112 | Helical | |||
Transmembrane | 132-154 | Helical | |||
Transmembrane | 166-193 | Helical | |||
Keywords
- Cellular component
Structure
Sequence
- Sequence statusFragment
- Length217
- Mass (Da)23,190
- Last updated2009-03-24 v1
- MD5 ChecksumEA2D39EFE2CBC35FFC2A42CC2E066DE2
Features
Showing features for non-terminal residue.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Non-terminal residue | 1 | ||||
Non-terminal residue | 217 | ||||
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
EU751899 EMBL· GenBank· DDBJ | ACD77775.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
EU751900 EMBL· GenBank· DDBJ | ACD77776.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
EU751901 EMBL· GenBank· DDBJ | ACD77777.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
GU807039 EMBL· GenBank· DDBJ | ADH42839.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
HQ564601 EMBL· GenBank· DDBJ | ADQ65069.1 EMBL· GenBank· DDBJ | Genomic DNA |