A0A9E8AD16 · A0A9E8AD16_9PASS

  • Protein
    Cytochrome b
  • Status
    UniProtKB unreviewed (TrEMBL)
  • Amino acids
  • Protein existence
    Inferred from homology
  • Annotation score
    2/5

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.

134650100150200250300
TypeIDPosition(s)Description
Binding site50Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue
Binding site64Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue
Binding site149Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue
Binding site163Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue
Binding site168a 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 Processrespiratory electron transport chain

Keywords

Names & Taxonomy

Protein names

  • Recommended name
    Cytochrome b

Encoded on

  • Mitochondrion

Organism names

  • Taxonomic identifier
  • Organism
  • Taxonomic lineage
    Eukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Archelosauria > Archosauria > Dinosauria > Saurischia > Theropoda > Coelurosauria > Aves > Neognathae > Passeriformes > Sylvioidea > Alaudidae > Mirafra

Accessions

  • Primary accession
    A0A9E8AD16

Subcellular Location

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

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane12-37Helical
Transmembrane49-70Helical
Transmembrane82-100Helical
Transmembrane107-125Helical
Transmembrane145-167Helical
Transmembrane196-217Helical
Transmembrane255-275Helical
Transmembrane287-307Helical
Transmembrane313-339Helical

Keywords

Family & Domains

Features

Showing features for domain.

TypeIDPosition(s)Description
Domain1-176Cytochrome b/b6 N-terminal region profile
Domain177-346Cytochrome b/b6 C-terminal region profile

Sequence similarities

Belongs to the cytochrome b family.

Keywords

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    346
  • Mass (Da)
    38,579
  • Last updated
    2023-05-03 v1
  • Checksum
    48597AD2649433D1
GSLLGICLIMQITTGLLLAMHYTADTSLAFASVAHICRDVQFGWLIRNLHANGASLFFICIYLHIGRGFYYGSYLNKETWNIGVILLLALMATAFVGYVLPWGQMSFWGATVITNLFSAIPYIGQTLVEWAWGGFSVDNPTLTRFFALHFLLPFFIAGLTLVHLTFLHETGSNNPLGIPSDCDKIPFHPYYSIKDLLGFVLLIILLTTLALFSPNLLGDPENFTPANPLATPPHIKPEWYFLFAYAILRSIPNKLGGVLALAASVLVLFLIPFLHTSKLRSMTFRPLSQILFWTLVANLLILTWVGSQPVEHPFIIIGQLASLSYFTIILILFPLVSILENKMLKL

Features

Showing features for non-terminal residue.

TypeIDPosition(s)Description
Non-terminal residue1

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
OK185489
EMBL· GenBank· DDBJ
UYY91571.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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