P23134 · CYB_RHORU

  • Protein
    Cytochrome b
  • Gene
    petB
  • Status
    UniProtKB reviewed (Swiss-Prot)
  • Amino acids
  • Protein existence
    Evidence at protein level
  • Annotation score
    3/5

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.

140550100150200250300350400
TypeIDPosition(s)Description
Binding site94Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue
Binding site108Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue
Binding site195Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue
Binding site209Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue

GO annotations

all annotationsall molecular functionvirus receptor activitydna bindingrna bindingcytoskeletal motor activitycatalytic activitygtpase activitystructural molecule activitytransporter activitycytoskeletal protein bindinglipid bindingcyclase activityantioxidant activityoxidoreductase activitytransferase activityhydrolase activitylyase activityisomerase activityligase activityprotein tag activitycargo receptor activityhistone bindingprotein folding chaperonetranslation regulator activitynutrient reservoir activityreceptor ligand activitymolecular transducer activitymolecular adaptor activitytoxin activitycell adhesion mediator activitymolecular function regulator activityvirus coreceptor activitycatalytic activity, acting on a proteincatalytic activity, acting on dnacatalytic activity, acting on rnamolecular carrier activitytranscription regulator activitygeneral transcription initiation factor activitymolecular sensor activitymolecular sequestering activityatp-dependent activityother molecular functionall biological processmitotic cell cyclecytokinesiscytoplasmic translationimmune system processmuscle system processcirculatory system processrenal system processrespiratory system processcarbohydrate metabolic processgeneration of precursor metabolites and energydna replicationdna repairdna recombinationchromatin organizationdna-templated transcriptionregulation of dna-templated transcriptiontrna metabolic processprotein foldingprotein glycosylationamino acid metabolic processmodified amino acid metabolic processlipid metabolic processvitamin metabolic processsulfur compound metabolic processintracellular protein transportnucleocytoplasmic transportautophagyinflammatory responsemitochondrion organizationcytoskeleton organizationmicrotubule-based movementperoxisome organizationlysosome organizationchromosome segregationcell adhesionestablishment or maintenance of cell polarityprogrammed cell deathphotosynthesismrna metabolic processsnrna metabolic processvesicle-mediated transportreproductive processdigestive system processsignalingcell differentiationprotein catabolic processextracellular matrix organizationregulatory ncrna-mediated gene silencingtelomere organizationcell junction organizationwound healingribosome biogenesiscilium organizationanatomical structure developmentcell motilitynervous system processendocrine processprotein maturationtransmembrane transportnucleobase-containing small molecule metabolic processhepaticobiliary system processmembrane organizationprotein-containing complex assemblycell wall organization or biogenesisnitrogen cycle metabolic processprotein localization to plasma membranedefense response to other organismdetoxificationmeiotic nuclear divisionmitotic nuclear divisionmitochondrial gene expressioncarbohydrate derivative metabolic processother biological processall cellular componentnuclear chromosomeextracellular regionextracellular spacecell wallnucleusnuclear envelopenucleoplasmchromosomenucleolusmitochondrionlysosomeendosomevacuoleperoxisomeendoplasmic reticulumgolgi apparatuslipid dropletmicrotubule organizing centercytosolribosomecytoskeletonplasma membraneciliumplastidthylakoidexternal encapsulating structureextracellular matrixcytoplasmic vesicleorganelleother cellular component
Cell color indicative of number of GO terms
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

Organism names

  • Taxonomic identifier
  • Strain
    • FR1
  • Taxonomic lineage
    Bacteria > Pseudomonadota > Alphaproteobacteria > Rhodospirillales > Rhodospirillaceae > Rhodospirillum

Accessions

  • Primary accession
    P23134

Subcellular Location

Features

Showing features for transmembrane.

TypeIDPosition(s)Description
Transmembrane44-64Helical
Transmembrane97-117Helical
Transmembrane124-144Helical
Transmembrane163-183Helical
Transmembrane191-211Helical
Transmembrane245-265Helical
Transmembrane303-323Helical
Transmembrane338-358Helical
Transmembrane368-388Helical

Keywords

PTM/Processing

Features

Showing features for chain.

TypeIDPosition(s)Description
ChainPRO_00000617731-405Cytochrome b

Interaction

Subunit

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

Structure

Family & Domains

Sequence similarities

Belongs to the cytochrome b family.

Keywords

Phylogenomic databases

Family and domain databases

Sequence

  • Sequence status
    Complete
  • Length
    405
  • Mass (Da)
    46,369
  • Last updated
    1991-11-01 v1
  • Checksum
    F19452FDA318BE6F
MYTPPRWNNKALKWFDERLPVLTVAHKELVVYPAPRNLNYFWNFGSLAGIAMIIMIATGIFLAMSYTAHVDHAFDSVERIMRDVNYGWLMRYMHANGASMFFIVVYVHMFRGLYYGSYKPPREVLWWLGLVILLLMMATAFMGYVLPWGQMSFWGATVITNLFSAIPVVGDDIVTLLWGGFSVDNPTLNRFFSLHYLFPMLLFAVVFLHMWALHVKKSNNPLGIDAKGPFDTIPFHPYYTVKDAFGLGIFLMVFCFFVFFAPNFFGEPDNYIPANPMVTPTHIVPEWYFLPFYAILRAVPDKLGGVLAMFGAILILFVLPWLDTSKVRSATFRPVFKGFFWVFLADCLLLGYLGAMPAEEPYVTITQLATIYYFLHFLVITPLVGWFEKPKPLPVSISSPVTTQA

Keywords

Sequence databases

Nucleotide SequenceProtein SequenceMolecule TypeStatus
X55387
EMBL· GenBank· DDBJ
CAA39059.1
EMBL· GenBank· DDBJ
Genomic DNA

Similar Proteins

Disclaimer

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