Q9MMS4 · Q9MMS4_EGRTR
- ProteinCytochrome b
- StatusUniProtKB unreviewed (TrEMBL)
- Amino acids347 (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 | 51 | Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 65 | Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 150 | Fe (UniProtKB | ChEBI) of heme b b562 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 164 | Fe (UniProtKB | ChEBI) of heme b b566 (UniProtKB | ChEBI); axial binding residue | |||
Binding site | 169 | 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
Encoded on
- Mitochondrion
Organism names
- Taxonomic lineageEukaryota > Metazoa > Chordata > Craniata > Vertebrata > Euteleostomi > Archelosauria > Archosauria > Dinosauria > Saurischia > Theropoda > Coelurosauria > Aves > Neognathae > Neoaves > Aequornithes > Pelecaniformes > Ardeidae > Egretta
Accessions
- Primary accessionQ9MMS4
Subcellular Location
UniProt Annotation
GO Annotation
Mitochondrion inner membrane ; Multi-pass membrane protein
Features
Showing features for transmembrane.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Transmembrane | 81-101 | Helical | |||
Transmembrane | 108-126 | Helical | |||
Transmembrane | 146-168 | Helical | |||
Transmembrane | 197-218 | Helical | |||
Transmembrane | 256-276 | Helical | |||
Transmembrane | 288-308 | Helical | |||
Transmembrane | 314-334 | Helical | |||
Keywords
- Cellular component
Structure
Family & Domains
Features
Showing features for domain.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Domain | 1-177 | Cytochrome b/b6 N-terminal region profile | |||
Domain | 178-347 | Cytochrome b/b6 C-terminal region profile | |||
Sequence similarities
Belongs to the cytochrome b family.
Keywords
- Domain
Family and domain databases
Sequence
- Sequence statusFragment
- Length347
- Mass (Da)38,743
- Last updated2000-10-01 v1
- Checksum8F805EEA3D402687
Features
Showing features for non-terminal residue.
Type | ID | Position(s) | Description | ||
---|---|---|---|---|---|
Non-terminal residue | 1 | ||||
Non-terminal residue | 347 | ||||
Sequence databases
Nucleotide Sequence | Protein Sequence | Molecule Type | Status | |
---|---|---|---|---|
AF193824 EMBL· GenBank· DDBJ | AAF40128.1 EMBL· GenBank· DDBJ | Genomic DNA |