C8YR44 · C8YR44_9RODE

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.

138050100150200250300350
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 respiratory 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 > Euarchontoglires > Glires > Rodentia > Myomorpha > Muroidea > Cricetidae > Arvicolinae > Microtus

Accessions

  • Primary accession
    C8YR44

Subcellular Location

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

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane30-52Helical
Transmembrane87-107Helical
Transmembrane113-133Helical
Transmembrane145-166Helical
Transmembrane178-200Helical
Transmembrane229-246Helical
Transmembrane288-307Helical
Transmembrane319-339Helical
Transmembrane345-366Helical

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
Domain210-380Cytochrome b/b6 C-terminal region profile

Sequence similarities

Belongs to the cytochrome b family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Fragment
  • Length
    380
  • Mass (Da)
    42,928
  • Last updated
    2009-11-03 v1
  • Checksum
    A2254A248F9AD73C
MTIIRKKHPLIKIINHSFIDLPAPSNISSWWNFGSLLGLCLIIQILTGLFLAMHYTSDTATAFSSVTHICRDVNYGWLIRYMHANGASMFFICLFLHVGRGIYYGSYNMIETWNMGIILLFAVMATAFMGYVLPWGQMSFWGATVITNLLSAIPYIGTTLVEWIWGGFSVDKATLTRFFAFHFILPFIITALVLVHLLFLHETGSNNPTGLNSDADKIPFHPYYTIKDFLGVLILLMAFMILTLFFPDILGDPDNYTPANPLNTPPHIKPEWYFLFAYAILRSIPNKLGGVLALILSIVILAFMPLLHTSKQRALTFRPITQTMYWMLVADLLVLTWIGGQPVEYPFIIIGQTASIAYFTIIVILMPMAGTFENNILDLD

Features

Showing features for non-terminal residue.

TypeIDPosition(s)Description
Non-terminal residue380

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
FJ767740
EMBL· GenBank· DDBJ
ACV53098.1
EMBL· GenBank· DDBJ
Genomic DNA
FJ767741
EMBL· GenBank· DDBJ
ACV53099.1
EMBL· GenBank· DDBJ
Genomic DNA
FJ767742
EMBL· GenBank· DDBJ
ACV53100.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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