M9PQ30 · M9PQ30_MOSCH

Function

function

Component of the ubiquinol-cytochrome c reductase complex (complex III or cytochrome b-c1 complex) that is part of the mitochondrial respiratory chain. The b-c1 complex mediates electron transfer from ubiquinol to cytochrome c. Contributes to the generation of a proton gradient across the mitochondrial membrane that is then used for ATP synthesis.

Cofactor

Protein has several cofactor binding sites:
heme b (UniProtKB | Rhea| CHEBI:60344 )

Note: Binds 2 heme groups non-covalently.
heme (UniProtKB | Rhea| CHEBI:30413 )

Note: Binds 2 heme groups non-covalently.

Features

Showing features for binding site.

137950100150200250300350
TypeIDPosition(s)Description
Binding site83Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue
Binding site97Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue
Binding site182Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue
Binding site196Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue
Binding site201a ubiquinone (UniProtKB | ChEBI)

GO annotations

AspectTerm
Cellular Componentmitochondrial inner membrane
Cellular Componentrespiratory chain complex III
Molecular Functionmetal ion binding
Molecular Functionubiquinol-cytochrome-c reductase activity
Biological Processmitochondrial electron transport, ubiquinol to cytochrome c

Keywords

Names & Taxonomy

Protein names

  • Recommended name
    Cytochrome b

Gene names

    • Name
      CYTB

Encoded on

  • Mitochondrion

Organism names

  • Taxonomic identifier
  • Taxonomic lineage
    Eukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Mammalia > Eutheria > Laurasiatheria > Artiodactyla > Ruminantia > Pecora > Moschidae > Moschus

Accessions

  • Primary accession
    M9PQ30

Subcellular Location

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane30-52Helical
Transmembrane87-107Helical
Transmembrane113-133Helical
Transmembrane140-158Helical
Transmembrane178-200Helical
Transmembrane221-245Helical
Transmembrane288-307Helical
Transmembrane319-340Helical
Transmembrane346-369Helical

Keywords

Interaction

Subunit

The cytochrome bc1 complex contains 11 subunits: 3 respiratory subunits (MT-CYB, CYC1 and UQCRFS1), 2 core proteins (UQCRC1 and UQCRC2) and 6 low-molecular weight proteins (UQCRH/QCR6, UQCRB/QCR7, UQCRQ/QCR8, UQCR10/QCR9, UQCR11/QCR10 and a cleavage product of UQCRFS1). This cytochrome bc1 complex then forms a dimer.

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain1-209Cytochrome b/b6 N-terminal region profile
Domain210-379Cytochrome b/b6 C-terminal region profile

Sequence similarities

Belongs to the cytochrome b family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    379
  • Mass (Da)
    42,887
  • Last updated
    2013-06-26 v1
  • Checksum
    677170779887FF4A
MTNIRKSHPLMKIVNNAFIDLPAPSNISSWWNFGSLLGICLIIQILTGLFLAMHYTSDTMTAFSSVTHICRDVNYGWIIRYMHANGASMFFICLFMHVGRGLYYGSYTFLETWNIGVILLFTVMATAFMGYVLPWGQMSFWGATVITNLLSAIPYIGTNLVEWIWGGFSVDKATLTRFFAFHFILPFIIAALAMVHLLFLHETGSNNPTGITSDMDKIPFHPYYTIKDILGVLLLILVLMTLVLFTPDLLGDPDNYTPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVLALVLSILILILMPLLHTSKQRSMMFRPLSQCLFWILVADLLTLTWIGGQPVEHPYIIIGQLASIMYFLLILVMMPVASMVENNLLKW

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
KC425457
EMBL· GenBank· DDBJ
AGG10762.1
EMBL· GenBank· DDBJ
Genomic DNA
KP684123
EMBL· GenBank· DDBJ
AKL78810.1
EMBL· GenBank· DDBJ
Genomic DNA
MW284875
EMBL· GenBank· DDBJ
QTC30931.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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