A8MN44 · A8MN44_CHRMG

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 Processoxidative phosphorylation

Keywords

Enzyme and pathway databases

Names & Taxonomy

Protein names

  • Recommended name
    Cytochrome c oxidase subunit 1
  • EC number

Gene names

    • Name
      COI

Encoded on

  • Mitochondrion

Organism names

Accessions

  • Primary accession
    A8MN44

Subcellular Location

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

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane70-96Helical
Transmembrane108-135Helical
Transmembrane155-176Helical
Transmembrane197-216Helical
Transmembrane228-250Helical
Transmembrane262-284Helical
Transmembrane304-327Helical
Transmembrane339-361Helical
Transmembrane373-398Helical

Keywords

Interaction

Subunit

Component of the cytochrome c oxidase (complex IV, CIV), a multisubunit enzyme composed of a catalytic core of 3 subunits and several supernumerary subunits. The complex exists as a monomer or a dimer and forms supercomplexes (SCs) in the inner mitochondrial membrane with ubiquinol-cytochrome c oxidoreductase (cytochrome b-c1 complex, complex III, CIII).

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain1-437Cytochrome oxidase subunit I profile

Sequence similarities

Belongs to the heme-copper respiratory oxidase family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Fragment
  • Length
    438
  • Mass (Da)
    48,140
  • Last updated
    2007-12-04 v1
  • Checksum
    918BE30F0CA27CF3
GGFGNWLVPLMLGAPDMAFPRLNNMSFWLLPPALTLLLVSSMVENGAGTGWTVYPPLSSNIAHGGASVDLAIFSLHLAGISSILGAVNFITTVINMRSTGITFDRMPLFVWSVVITALLLLLSLPVLAGAITMLLTDRNLNTSFFDPAGGGDPILYQHLFWFFGHPEVYILILPGFGMISHIISQESGKKETFGSLGMIYAMLAIGLLGFIVWAHHMFTVGMDVDTRAYFTSATMIIAVPTGIKIFSWLATLYGTQLNYSPATLWALGFVFLFTVGGLTGVVLANSSIDIILHDTYYVVAHFHYVLSMGAVFAIMAGFVHWFPLFTGLTLNSKLLKSQFAIMFIGVNLTFFPQHFLGLAGMPRRYSDYPDAYTAWNVISTIGSTISLLGILFFFFIIWESLVSQRRVLFPVQLNSSIEWLQNTPPAEHSYSELPLLTN

Features

Showing features for non-terminal residue.

TypeIDPosition(s)Description
Non-terminal residue1
Non-terminal residue438

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
DQ345076
EMBL· GenBank· DDBJ
ABC79654.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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