B3IWP2 · B3IWP2_ENGJA
- ProteinCytochrome b
- Genecyt b
- StatusUniProtKB unreviewed (TrEMBL)
- Amino acids338 (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 | 83 | Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 97 | Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 182 | Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 196 | Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 201 | 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
- Taxonomic lineageEukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Actinopterygii > Neopterygii > Teleostei > Clupei > Clupeiformes > Clupeoidei > Engraulidae > Engraulinae > Engraulis
Accessions
- Primary accessionB3IWP2
Subcellular Location
UniProt Annotation
GO Annotation
Mitochondrion inner membrane ; Multi-pass membrane protein
Features
Showing features for transmembrane.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Transmembrane | 29-52 | Helical | |||
Transmembrane | 87-107 | Helical | |||
Transmembrane | 113-133 | Helical | |||
Transmembrane | 140-158 | Helical | |||
Transmembrane | 178-200 | Helical | |||
Transmembrane | 229-250 | Helical | |||
Transmembrane | 288-307 | Helical | |||
Transmembrane | 319-337 | Helical | |||
Keywords
- Cellular component
Structure
Family & Domains
Features
Showing features for domain.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Domain | 1-209 | Cytochrome b/b6 N-terminal region profile | |||
Domain | 210-338 | Cytochrome b/b6 C-terminal region profile | |||
Sequence similarities
Belongs to the cytochrome b family.
Keywords
- Domain
Family and domain databases
Sequence
- Sequence statusFragment
- Length338
- Mass (Da)37,754
- Last updated2008-09-02 v1
- ChecksumD71162EED8E01202
Features
Showing features for non-terminal residue.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Non-terminal residue | 338 | ||||
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
AB374208 EMBL· GenBank· DDBJ | BAG54804.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
AB374211 EMBL· GenBank· DDBJ | BAG54807.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
AB374214 EMBL· GenBank· DDBJ | BAG54810.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
AB374217 EMBL· GenBank· DDBJ | BAG54813.1 EMBL· GenBank· DDBJ | Genomic DNA | ||
AB374221 EMBL· GenBank· DDBJ | BAG54817.1 EMBL· GenBank· DDBJ | Genomic DNA |