A3R454 · A3R454_MUSMC

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 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

Gene names

    • Name
      COXI
    • Synonyms
      COX1

Encoded on

  • Mitochondrion

Organism names

  • Taxonomic identifier
  • Strains
    • CAST/EiJ
    • GX
    • KM
    • PX
    • TW1
  • Taxonomic lineage
    Eukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Mammalia > Eutheria > Euarchontoglires > Glires > Rodentia > Myomorpha > Muroidea > Muridae > Murinae > Mus > Mus

Accessions

  • Primary accession
    A3R454

Subcellular Location

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

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane18-37Helical
Transmembrane57-83Helical
Transmembrane104-128Helical
Transmembrane148-171Helical
Transmembrane183-210Helical
Transmembrane243-261Helical
Transmembrane268-291Helical
Transmembrane303-325Helical
Transmembrane337-359Helical
Transmembrane379-400Helical
Transmembrane412-433Helical
Transmembrane453-473Helical

Keywords

Structure

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain1-512Cytochrome oxidase subunit I profile

Sequence similarities

Belongs to the heme-copper respiratory oxidase family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    514
  • Mass (Da)
    56,910
  • Last updated
    2007-04-03 v1
  • Checksum
    9F7FB173ED6A9763
MFINRWLFSTNHKDIGTLYLLFGAWAGMVGTALSILIRAELGQPGALLGDDQIYNVIVTAHAFVMIFFMVMPMMIGGFGNWLVPLMIGAPDMAFPRMNNMSFWLLPPSFLLLLASSMVEAGAGTGWTVYPPLAGNLAHAGASVDLTIFSLHLAGVSSILGAINFITTIINMKPPAMTQYQTPLFVWSVLITAVLLLLSLPVLAAGITMLLTDRNLNTTFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGIISHVVTYYSGKKEPFGYMGMVWAMMSIGFLGFIVWAHHMFTVGLDVDTRAYFTSATMIIAIPTGVKVFSWLATLHGGNIKWSPAMLWALGFIFLFTVGGLTGIVLSNSSLDIVLHDTYYVVAHFHYVLSMGAVFAIMAGFVHWFPLFSGFTLDDTWAKAHFAIMFVGVNMTFFPQHFLGLSGMPRRYSDYPDAYTTWNTVSSMGSFISLTAVLIMIFMIWEAFASKREVMSVSYASTNLEWLHGCPPPYHTFEEPTYVKVK

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
EF108342
EMBL· GenBank· DDBJ
ABK79251.1
EMBL· GenBank· DDBJ
Genomic DNA
KF781657
EMBL· GenBank· DDBJ
AHG32190.1
EMBL· GenBank· DDBJ
Genomic DNA
KF781658
EMBL· GenBank· DDBJ
AHG32203.1
EMBL· GenBank· DDBJ
Genomic DNA
KF781659
EMBL· GenBank· DDBJ
AHG32216.1
EMBL· GenBank· DDBJ
Genomic DNA
KF781660
EMBL· GenBank· DDBJ
AHG32229.1
EMBL· GenBank· DDBJ
Genomic DNA
KF781661
EMBL· GenBank· DDBJ
AHG32242.1
EMBL· GenBank· DDBJ
Genomic DNA
KF781663
EMBL· GenBank· DDBJ
AHG32268.1
EMBL· GenBank· DDBJ
Genomic DNA
KF781664
EMBL· GenBank· DDBJ
AHG32281.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

Disclaimer

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