Q4F387 · Q4F387_HUMAN
- ProteinCytochrome c oxidase subunit 1
- GeneCOX1
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids513 (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] + 8 H+(in) + O2 = 4 Fe(III)-[cytochrome c] + 4 H+(out) + 2 H2OThis reaction proceeds in the forward direction.
4 RHEA-COMP:10350 + 8 H+ (in)CHEBI:15378+ CHEBI:15379 = 4 RHEA-COMP:14399 + 4 H+ (out)CHEBI:15378+ 2 CHEBI:15377
Cofactor
Protein has several cofactor binding sites:
Pathway
Energy metabolism; oxidative phosphorylation.
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | mitochondrial respiratory chain complex IV | |
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
- 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 > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Mammalia > Eutheria > Euarchontoglires > Primates > Haplorrhini > Catarrhini > Hominidae > Homo
Accessions
- Primary accessionQ4F387
Subcellular Location
UniProt Annotation
GO Annotation
Membrane ; Multi-pass membrane protein
Mitochondrion inner membrane ; Multi-pass membrane protein
Features
Showing features for transmembrane.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Transmembrane | 18-37 | Helical | ||||
Sequence: LYLLFGAWAGVLGTALSLLI | ||||||
Transmembrane | 57-83 | Helical | ||||
Sequence: IVTAHAFVMIFFMVMPIMIGGFGNWLV | ||||||
Transmembrane | 104-128 | Helical | ||||
Sequence: LLPPSLLLLLASAMVEAGAGTGWTV | ||||||
Transmembrane | 148-171 | Helical | ||||
Sequence: FSLHLAGVSSILGAINFITTIINM | ||||||
Transmembrane | 183-210 | Helical | ||||
Sequence: LFVWSVLITAVLLLLSLPVLAAGITMLL | ||||||
Transmembrane | 243-261 | Helical | ||||
Sequence: VYILILPGFGMISHIVTYY | ||||||
Transmembrane | 268-291 | Helical | ||||
Sequence: FGYMGMVWAMMSIGFLGFIVWAHH | ||||||
Transmembrane | 303-325 | Helical | ||||
Sequence: AYFTSATMIIAIPTGVKVFSWLA | ||||||
Transmembrane | 337-359 | Helical | ||||
Sequence: AVLWALGFIFLFTVGGLTGIVLA | ||||||
Transmembrane | 379-400 | Helical | ||||
Sequence: YVLSMGAVFAIMGGFIHWFPLF | ||||||
Transmembrane | 412-430 | Helical | ||||
Sequence: IHFAIMFIGVNLTFFPQHF | ||||||
Transmembrane | 450-473 | Helical | ||||
Sequence: WNILSSVGSFISLTAVMLMIFMIW |
Keywords
- Cellular component
PTM/Processing
Proteomic databases
Structure
Family & Domains
Features
Showing features for domain.
Type | ID | Position(s) | Description | |||
---|---|---|---|---|---|---|
Domain | 1-511 | Cytochrome oxidase subunit I profile | ||||
Sequence: MFVDRWLFSTNHKDIGTLYLLFGAWAGVLGTALSLLIRAELGQPGNLLGNDHIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWLLPPSLLLLLASAMVEAGAGTGWTVYPPLAGNYSHPGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAMTQYQTPLFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIVTYYSGKKEPFGYMGMVWAMMSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAIPTGVKVFSWLATLHGSNMKWSAAVLWALGFIFLFTVGGLTGIVLANSSLDIVLHDTYYVVAHFHYVLSMGAVFAIMGGFIHWFPLFSGYTLDQTYAKIHFAIMFIGVNLTFFPQHFLGLSGMPRRYSDYPDAYTTWNILSSVGSFISLTAVMLMIFMIWEAFASKRKVLMVEEPSMNLEWLYGCPPPYHTFEEPVYM |
Sequence similarities
Belongs to the heme-copper respiratory oxidase family.
Keywords
- Domain
Family and domain databases
Sequence
- Sequence statusComplete
- Length513
- Mass (Da)57,039
- Last updated2005-08-30 v1
- Checksum13CAE32BEBE673B6
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
DQ112777 EMBL· GenBank· DDBJ | AAZ00971.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
DQ304897 EMBL· GenBank· DDBJ | ABB97557.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
EF657743 EMBL· GenBank· DDBJ | ABR99618.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
EU092688 EMBL· GenBank· DDBJ | ABU64370.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
JQ702326 EMBL· GenBank· DDBJ | AFF68198.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
KC622077 EMBL· GenBank· DDBJ | AGJ95475.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
KC533498 EMBL· GenBank· DDBJ | AGK64714.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
KF450901 EMBL· GenBank· DDBJ | AGZ65348.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
KF672806 EMBL· GenBank· DDBJ | AHA47512.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
KJ185398 EMBL· GenBank· DDBJ | AID07585.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
KJ669114 EMBL· GenBank· DDBJ | AIG60280.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
KM101662 EMBL· GenBank· DDBJ | AIU58307.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
KP635239 EMBL· GenBank· DDBJ | AKK32058.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MF055775 EMBL· GenBank· DDBJ | ASR94002.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MF621130 EMBL· GenBank· DDBJ | ATP05685.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MF381287 EMBL· GenBank· DDBJ | AUR39873.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MF695865 EMBL· GenBank· DDBJ | AUT77357.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MH981602 EMBL· GenBank· DDBJ | AYV90032.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
MK248295 EMBL· GenBank· DDBJ | QFV14618.1 EMBL· GenBank· DDBJ | Genomic DNA |