A0A499MR63 · A0A499MR63_9FLOR

  • Protein
    Cytochrome c oxidase subunit 1
  • Gene
    COI
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    2/5

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

Gene names

    • Name
      COI

Encoded on

  • Mitochondrion

Organism names

  • Taxonomic identifier
  • Organism
  • Taxonomic lineage
    Eukaryota > Rhodophyta > Florideophyceae > Corallinophycidae > Hapalidiales > Hapalidiaceae > Melobesioideae > Synarthrophyton

Accessions

  • Primary accession
    A0A499MR63

Subcellular Location

Mitochondrion inner membrane
; Multi-pass membrane protein

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane42-69Helical
Transmembrane90-112Helical
Transmembrane132-157Helical
Transmembrane169-196Helical

Keywords

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain1-221Cytochrome oxidase subunit I profile

Sequence similarities

Belongs to the heme-copper respiratory oxidase family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Fragment
  • Length
    221
  • Mass (Da)
    23,946
  • Last updated
    2019-07-03 v1
  • Checksum
    C88C35515A2D8114
TLYLIFGSFSGVLGACISILIRMELAQPGNHLLLGNHQVYNVLITAHAFLMIFFLVMPVMIGGFGNWLVPIMIGSPDMAFPRLNNISFWLLPPSLCLLLTSSIIEVGTGTGWTVYPPLSSIQSHSGASVDLAIFSLHLAGASSILGAVNFISTILNMRNPGQSMYRIPLFVWSIFVTAFLLLLAVPVLAGAITMLLTDRNFNTSFFDPAGGGDPILYQHLF

Features

Showing features for non-terminal residue.

TypeIDPosition(s)Description
Non-terminal residue1
Non-terminal residue221

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
HM916443
EMBL· GenBank· DDBJ
ADR39383.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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