Cytochrome b
Cytochrome b within both molecular and cell biology, is a protein found in the membranes of aerobic cells. In eukaryotic mitochondria (inner membrane) and in aerobic prokaryotes, cytochrome b is a component of respiratory chain complex III (EC 1.10.2.2) — also known as the bc1 complex or ubiquinol-cytochrome c reductase. In plant chloroplasts and cyanobacteria, there is an homologous protein, cytochrome b6, a component of the plastoquinone-plastocyanin reductase (EC 1.10.99.1), also known as the b6f complex. These complexes are involved in electron transport, the pumping of protons to create a proton-motive force (PMF). This proton gradient is used for the generation of ATP. These complexes play a vital role in cells.
| Cytochrome b, N-terminal transmembrane domain | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Mitochondrial cytochrome bc1 complex | |||||||||
| Identifiers | |||||||||
| Symbol | Cytochrom_B_N | ||||||||
| Pfam | PF00033 | ||||||||
| InterPro | IPR005797 | ||||||||
| PROSITE | PDOC00171 | ||||||||
| SCOP2 | 3bcc / SCOPe / SUPFAM | ||||||||
| TCDB | 3.D.3 | ||||||||
| OPM superfamily | 3 | ||||||||
| OPM protein | 3h1j | ||||||||
| CDD | cd00284 | ||||||||
| |||||||||
| Cytochrome b, C-terminal domain | |||||||||
|---|---|---|---|---|---|---|---|---|---|
Mitochondrial cytochrome bc1 complex | |||||||||
| Identifiers | |||||||||
| Symbol | Cytochrom_B_C | ||||||||
| Pfam | PF00032 | ||||||||
| InterPro | IPR005798 | ||||||||
| |||||||||
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