A0A068LEJ4 · A0A068LEJ4_9STRA

  • 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

Pathway

Energy metabolism; oxidative phosphorylation.

GO annotations

AspectTerm
Cellular Componentmitochondrial respiratory 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
  • Strain
    • 34
  • Taxonomic lineage
    Eukaryota > Sar > Stramenopiles > Ochrophyta > Bacillariophyta > Mediophyceae > Biddulphiophycidae > Hemiaulales > Hemiaulaceae > Eucampia

Accessions

  • Primary accession
    A0A068LEJ4

Subcellular Location

Mitochondrion inner membrane
; Multi-pass membrane protein

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane53-82Helical
Transmembrane94-121Helical

Keywords

PTM/Processing

Features

Showing features for signal, chain.

TypeIDPosition(s)Description
Signal1-31
ChainPRO_500165131432-133Cytochrome c oxidase subunit 1

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain1-133Cytochrome oxidase subunit I profile

Sequence similarities

Belongs to the heme-copper respiratory oxidase family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Fragment
  • Length
    133
  • Mass (Da)
    14,282
  • Last updated
    2014-10-01 v1
  • Checksum
    99B8FBC7D976F507
PDMAFPRMNNISFWLLPPSLLLLIASVLTEAGVGTGWTVYPPLSSGTAHSGGAVDLAIFSLHVSGASSILGAINFICTIFNMRVKSLSFHKLPLFAWSVLITAFLLLLSLPVLAGAITMLLTDRNFNTTFFDP

Features

Showing features for non-terminal residue.

TypeIDPosition(s)Description
Non-terminal residue1
Non-terminal residue133

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
KJ671731
EMBL· GenBank· DDBJ
AIE44682.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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