O54070 · CYB_RICPR
- ProteinCytochrome b
- GenepetB
- StatusUniProtKB reviewed (Swiss-Prot)
- Amino acids398 (go to sequence)
- Protein existenceInferred from homology
- Annotation score3/5
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
Note: Binds 2 heme b groups non-covalently.
Features
Showing features for binding site.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Binding site | 95 | Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 109 | Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 196 | Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 210 | Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue | |||
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | plasma membrane | |
Cellular Component | respiratory chain complex III | |
Molecular Function | metal ion binding | |
Molecular Function | ubiquinol-cytochrome-c reductase activity | |
Biological Process | respiratory electron transport chain |
Keywords
- Biological process
- Ligand
Names & Taxonomy
Protein names
- Recommended nameCytochrome b
Gene names
Organism names
- Strain
- Taxonomic lineageBacteria > Pseudomonadota > Alphaproteobacteria > Rickettsiales > Rickettsiaceae > Rickettsieae > Rickettsia > typhus group
Accessions
- Primary accessionO54070
Proteomes
Subcellular Location
UniProt Annotation
GO Annotation
Cell membrane ; Multi-pass membrane protein
Features
Showing features for transmembrane.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Transmembrane | 45-65 | Helical | |||
Transmembrane | 96-116 | Helical | |||
Transmembrane | 129-149 | Helical | |||
Transmembrane | 164-184 | Helical | |||
Transmembrane | 192-212 | Helical | |||
Transmembrane | 245-265 | Helical | |||
Transmembrane | 277-297 | Helical | |||
Transmembrane | 304-324 | Helical | |||
Transmembrane | 339-359 | Helical | |||
Transmembrane | 366-386 | Helical | |||
Keywords
- Cellular component
PTM/Processing
Features
Showing features for chain.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Chain | PRO_0000061776 | 1-398 | Cytochrome b | ||
Interaction
Subunit
The main subunits of complex b-c1 are: cytochrome b, cytochrome c1 and the Rieske protein.
Protein-protein interaction databases
Structure
Sequence
- Sequence statusComplete
- Length398
- Mass (Da)45,917
- Last updated1998-06-01 v1
- MD5 ChecksumEB0D4AD4FF4DCEE132BF2FC00D252350
Keywords
- Technical term
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
Y13854 EMBL· GenBank· DDBJ | CAA74166.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
AJ235271 EMBL· GenBank· DDBJ | CAA14733.1 EMBL· GenBank· DDBJ | Genomic DNA |