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O54070 · CYB_RICPR

Function

function

Component of the ubiquinol-cytochrome c reductase complex (complex III or cytochrome b-c1 complex), which is a respiratory chain that generates an electrochemical potential coupled to ATP synthesis.

Miscellaneous

Heme 1 (or BL or b562) is low-potential and absorbs at about 562 nm, and heme 2 (or BH or b566) is high-potential and absorbs at about 566 nm.

Cofactor

heme b (UniProtKB | Rhea| CHEBI:60344 )

Note: Binds 2 heme b groups non-covalently.

Features

Showing features for binding site.

139850100150200250300350
TypeIDPosition(s)Description
Binding site95Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue
Binding site109Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue
Binding site196Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue
Binding site210Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue

GO annotations

AspectTerm
Cellular Componentplasma 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

Gene names

    • Name
      petB
    • Synonyms
      cytB
    • Ordered locus names
      RP271

Organism names

Accessions

  • Primary accession
    O54070

Proteomes

Subcellular Location

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane45-65Helical
Transmembrane96-116Helical
Transmembrane129-149Helical
Transmembrane164-184Helical
Transmembrane192-212Helical
Transmembrane245-265Helical
Transmembrane277-297Helical
Transmembrane304-324Helical
Transmembrane339-359Helical
Transmembrane366-386Helical

Keywords

PTM/Processing

Features

Showing features for chain.

TypeIDPosition(s)Description
ChainPRO_00000617761-398Cytochrome b

Interaction

Subunit

The main subunits of complex b-c1 are: cytochrome b, cytochrome c1 and the Rieske protein.

Protein-protein interaction databases

Structure

Family & Domains

Sequence similarities

Belongs to the cytochrome b family.

Keywords

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    398
  • Mass (Da)
    45,917
  • Last updated
    1998-06-01 v1
  • MD5 Checksum
    EB0D4AD4FF4DCEE132BF2FC00D252350
MNKEIIHKKSNGIIEWIDYRLPIFSFLKHFSYYQTPKNLNYLWNLGSIAGIALVIQIITGVILAMHYTPHVDHAFESVERIMRNVNYGWLLRYTHAVGASMFFAAIYLHIARGLYYGSYKTPRELLWHIGIIIFLIMMATAFMGYVLPWGQMSYWGATVITNLFSAIPLVGEPIVIWLWGGFSVDNPTLNRFFALHYLFPFIIVVLVILHLVALHQHGSNNPKGIDVKSTKDTIPFHPYYTVKDFVGFGVYFIIFAYFIFYAPNYLGHPDNYIPANPLVTPAHIVPEWYFLPFYAILRAVPSKLGGVFLMFGSIVVLFLLPWLDTSKIRSGNYRPIYRIAFWIFMADCLFLGYLGSKPVSEPYITISRFAVCYYFCHFLLVLPLIGKYEKPLPLPKVL

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
Y13854
EMBL· GenBank· DDBJ
CAA74166.1
EMBL· GenBank· DDBJ
Genomic DNA
AJ235271
EMBL· GenBank· DDBJ
CAA14733.1
EMBL· GenBank· DDBJ
Genomic DNA

Genome annotation databases

Similar Proteins

Disclaimer

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