A0A4Y5S2R2 · A0A4Y5S2R2_OTOMG

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
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
      CO1

Encoded on

  • Mitochondrion

Organism names

  • Taxonomic identifier
  • Strain
    • Om1_LE_MAF_2017_Om254
  • Taxonomic lineage
    Eukaryota > Metazoa > Ecdysozoa > Arthropoda > Chelicerata > Arachnida > Acari > Parasitiformes > Ixodida > Ixodoidea > Argasidae > Ornithodorinae > Otobius

Accessions

  • Primary accession
    A0A4Y5S2R2

Subcellular Location

Mitochondrion inner membrane
; Multi-pass membrane protein

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane37-59Helical
Transmembrane79-103Helical
Transmembrane123-148Helical
Transmembrane160-187Helical

Keywords

PTM/Processing

Features

Showing features for signal, chain.

TypeIDPosition(s)Description
Signal1-21
ChainPRO_502141229222-218Cytochrome c oxidase subunit 1

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain1-218Cytochrome oxidase subunit I profile

Sequence similarities

Belongs to the heme-copper respiratory oxidase family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Fragment
  • Length
    218
  • Mass (Da)
    24,039
  • Last updated
    2019-09-18 v1
  • Checksum
    AC8FB93AE90DCAEB
AWSMMTGMSLSLLIRLELVQPGSMIGNDQIYNVIVTSHAFIMIFFMVMPIMIGGFGNWLTPIMLGVPDMAFPRMNNMSFWLLPPSLFLLLTSSMVENGAGTGWTVYPPLASNISHSGMSVDLAIFSLHLAGVSSILGSINFITTIMNMRPKGMTLERIPLFLWSILTTTILLLLSLPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLFWFFGHP

Features

Showing features for non-terminal residue.

TypeIDPosition(s)Description
Non-terminal residue1
Non-terminal residue218

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
MK541811
EMBL· GenBank· DDBJ
QDA15982.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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