A0A1Q1M7J0 · A0A1Q1M7J0_9ARAC
- ProteinCytochrome b
- GeneCYTB
- StatusUniProtKB unreviewed (TrEMBL)
- Organism
- Amino acids370 (go to sequence)
- Protein existenceInferred from homology
- Annotation score2/5
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:
Note: Binds 2 heme groups non-covalently.
Note: Binds 2 heme groups non-covalently.
Features
Showing features for binding site.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Binding site | 80 | Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 94 | Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 179 | Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 193 | Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 198 | a ubiquinone (UniProtKB | ChEBI) | |||
GO annotations
Aspect | Term | |
---|---|---|
Cellular Component | mitochondrial inner membrane | |
Cellular Component | respiratory chain complex III | |
Molecular Function | metal ion binding | |
Molecular Function | ubiquinol-cytochrome-c reductase activity | |
Biological Process | mitochondrial electron transport, ubiquinol to cytochrome c |
Keywords
- Biological process
- Ligand
Names & Taxonomy
Protein names
- Recommended nameCytochrome b
Gene names
Encoded on
- Mitochondrion
Organism names
- Organism
- Strain
- Taxonomic lineageEukaryota > Metazoa > Ecdysozoa > Arthropoda > Chelicerata > Arachnida > Araneae > Mygalomorphae > Idiopidae > Aganippe
Accessions
- Primary accessionA0A1Q1M7J0
Subcellular Location
UniProt Annotation
GO Annotation
Mitochondrion inner membrane ; Multi-pass membrane protein
Features
Showing features for transmembrane.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Transmembrane | 26-54 | Helical | |||
Transmembrane | 74-93 | Helical | |||
Transmembrane | 105-129 | Helical | |||
Transmembrane | 135-154 | Helical | |||
Transmembrane | 175-196 | Helical | |||
Transmembrane | 226-247 | Helical | |||
Transmembrane | 284-305 | Helical | |||
Transmembrane | 312-332 | Helical | |||
Transmembrane | 344-365 | Helical | |||
Keywords
- Cellular component
Interaction
Subunit
The main subunits of complex b-c1 are: cytochrome b, cytochrome c1 and the Rieske protein.
Structure
Family & Domains
Features
Showing features for domain.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Domain | 1-206 | Cytochrome b/b6 N-terminal region profile | |||
Domain | 207-370 | Cytochrome b/b6 C-terminal region profile | |||
Sequence similarities
Belongs to the cytochrome b family.
Keywords
- Domain
Family and domain databases
Sequence
- Sequence statusFragment
- Length370
- Mass (Da)41,620
- Last updated2017-04-12 v1
- Checksum2DC697A555FA89D7
Features
Showing features for non-terminal residue.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Non-terminal residue | 1 | ||||
Non-terminal residue | 370 | ||||
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
KY295355 EMBL· GenBank· DDBJ | AQM32050.1 EMBL· GenBank· DDBJ | Genomic DNA |