A0A342T338 · A0A342T338_SPHHU

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

Cofactor

Protein has several cofactor binding sites:
Cu cation (UniProtKB | Rhea| CHEBI:23378 )

heme (UniProtKB | Rhea| CHEBI:30413 )

Pathway

Energy metabolism; oxidative phosphorylation.

GO annotations

AspectTerm
Cellular Componentmitochondrial inner membrane
Cellular Componentrespiratory chain complex IV
Molecular Functioncytochrome-c oxidase activity
Molecular Functionheme binding
Molecular Functionmetal ion binding
Biological Processoxidative phosphorylation

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Cytochrome c oxidase subunit 1
  • EC number

Gene names

    • Name
      COX1

Encoded on

  • Mitochondrion

Organism names

  • Taxonomic identifier
  • Strain
    • 6
  • Taxonomic lineage
    Eukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Archelosauria > Archosauria > Dinosauria > Saurischia > Theropoda > Coelurosauria > Aves > Neognathae > Sphenisciformes > Spheniscidae > Spheniscus

Accessions

  • Primary accession
    A0A342T338

Subcellular Location

Membrane
; Multi-pass membrane protein
Mitochondrion inner membrane
; Multi-pass membrane protein

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane20-38Helical
Transmembrane58-84Helical
Transmembrane105-127Helical
Transmembrane147-172Helical
Transmembrane184-211Helical
Transmembrane244-264Helical
Transmembrane271-292Helical
Transmembrane304-328Helical
Transmembrane340-360Helical
Transmembrane380-401Helical
Transmembrane413-437Helical
Transmembrane457-477Helical

Keywords

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain7-512Cytochrome oxidase subunit I profile

Sequence similarities

Belongs to the heme-copper respiratory oxidase family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    516
  • Mass (Da)
    56,971
  • Last updated
    2018-11-07 v1
  • Checksum
    226A0AE98C7605A1
MTFINRWLFSTNHKDIGTLYLIFGAWAGMAGTALSLLIRAELGQPGTLLGDDQIYNVIVTAHAFVMIFFMVMPIMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWLLPPSFLLLLASSTVEAGAGTGWTVYPPLAGNLAHAGASVDLAIFSLHLAGISSILGAINFITTATNMKPPALSQYQTPLFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGIISHVVAYYAGKKEPFGYMGMVWAMLSIGFLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAIPTGIKVFSWLATLHGGTIKWDPPMLWALGFIFLFTIGGLTGIVLANSSLDIALHDTYYVVAHFHYVLSMGAVFAILAGFTHWFPLFTGYTLHTTWAKAHFGVMFTGVNLTFFPQHFLGLAGMPRRYSDYPDAYTMWNTMSSIGSLISMTAVIMLMFIIWEAFTSKRKVLQPELTATNIEWIHGCPPPYHTFEEPAFVQVQE

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
KM891593
EMBL· GenBank· DDBJ
AJO68680.1
EMBL· GenBank· DDBJ
Genomic DNA
KU361805
EMBL· GenBank· DDBJ
AON77378.1
EMBL· GenBank· DDBJ
Genomic DNA
MK760995
EMBL· GenBank· DDBJ
QOJ46816.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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