A0A192B6K5 · A0A192B6K5_9STRA

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
      coxI

Encoded on

  • Mitochondrion

Organism names

Accessions

  • Primary accession
    A0A192B6K5

Subcellular Location

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

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane21-43Helical
Transmembrane77-97Helical
Transmembrane117-139Helical
Transmembrane151-178Helical
Transmembrane211-230Helical
Transmembrane237-258Helical
Transmembrane270-292Helical

Keywords

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain1-309Cytochrome oxidase subunit I profile

Sequence similarities

Belongs to the heme-copper respiratory oxidase family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Fragment
  • Length
    309
  • Mass (Da)
    33,724
  • Last updated
    2016-10-05 v1
  • Checksum
    BDCF79A1064DCF4E
LLIRMELAQPGNQILMGNHQLYNVIVTAHAFIMVFFLVMPALIGGFGNWFVPLMIGAPDMAFPRMNNISFWLLPPSLLLLVSSALVESGAGTGWTVYPPLSSVQAHSGPSVDLAIFSLHLSGISSLLGAINFISTIYNMRAPGLSFHRLPLFVWSVLITAFLLLLTLPVLAGAITMLLTDRNLNTSFYDPSGGGDPVLYQHLFWFFGHPEVYILILPAFGIISQVAAAFARKNVFGYLGMVYAMLSIGLLGSIVWAHHMFTVGLDVDTRAYFSAATMIIAVPTGIKIFSWLATLWGGSLKFETPLLFVL

Features

Showing features for non-terminal residue.

TypeIDPosition(s)Description
Non-terminal residue1
Non-terminal residue309

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
KU682611
EMBL· GenBank· DDBJ
ANJ89170.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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