Q859X4 · Q859X4_9ECHO

  • Protein
    Cytochrome c oxidase subunit 1
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    3/5

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

Cofactor

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 Processelectron transport coupled proton transport
Biological Processmitochondrial electron transport, cytochrome c to oxygen

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Cytochrome c oxidase subunit 1
  • EC number

Encoded on

  • Mitochondrion

Organism names

  • Taxonomic identifier
  • Organism
  • Strains
    • OKOB255
    • OKOB256
  • Taxonomic lineage
    Eukaryota > Metazoa > Echinodermata > Eleutherozoa > Echinozoa > Echinoidea > Euechinoidea > Echinacea > Camarodonta > Echinidea > Echinometridae > Echinometra

Accessions

  • Primary accession
    Q859X4

Subcellular Location

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

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane23-53Helical
Transmembrane74-98Helical
Transmembrane118-141Helical
Transmembrane153-180Helical
Transmembrane213-231Helical
Transmembrane238-261Helical
Transmembrane273-296Helical
Transmembrane308-329Helical
Transmembrane349-370Helical

Keywords

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain1-379Cytochrome oxidase subunit I profile

Sequence similarities

Belongs to the heme-copper respiratory oxidase family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Fragment
  • Length
    379
  • Mass (Da)
    41,490
  • Last updated
    2003-06-01 v1
  • Checksum
    F7F63D21CE1A7BA8
TAMSVIIRAELAQPGSLLNDDQIYNVVVTAHALVMIFFMVMPIMIGGFGNWLIPLMIGAPDMAFPRMNNMSFWLVPPSFILLLASAGVESGAGTGWTIYPPLSSNIAHAGGSVDLAIFSLHLAGASSILASINFITTIINMRTPGMSFDRLPLFVWSVFVTAFLLLLSLXVLAGAITMLLTDRNINTTFFDPAGGGDXILFQHLFXFFGHPEVYILILPGFGMISHVIAHYSGKREPFGYLGMVYAMIAIGVLGFLVWAHHMFTVGMDVDTRAYFTAATMIIAVPTGIKVFSWMATLQGSNLQWETPLFWALGFVFLFTLGGLTGIVLANSSIDVVLHDTYYVVAHFHYVLSMGAVFAIFAGFTHWFPLFSGYNLHPLW

Features

Showing features for non-terminal residue.

TypeIDPosition(s)Description
Non-terminal residue1
Non-terminal residue379

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
AY262931
EMBL· GenBank· DDBJ
AAP31653.1
EMBL· GenBank· DDBJ
Genomic DNA
AY262932
EMBL· GenBank· DDBJ
AAP31654.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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