CATH Classification

Domain Context

CATH Clusters

Superfamily Rieske [2Fe-2S] iron-sulphur domain
Functional Family Cytochrome b-c1 complex subunit Rieske

Enzyme Information

1.10.2.2
Quinol--cytochrome-c reductase.
based on mapping to UniProt P0CY48
Quinol + 2 ferricytochrome c = quinone + 2 ferrocytochrome c + 2 H(+).
-!- The enzyme, often referred to as the cytochrome bc1 complex or complex III, is the third complex in the electron transport chain. -!- It is present in the mitochondria of all aerobic eukaryotes and in the inner membranes of most bacteria. -!- The mammalian enzyme contains cytochromes b-562, b-566 and C(1), and a 2-iron ferredoxin. -!- Depending on the organism and physiological conditions, the enzyme extrudes either two or four protons from the cytoplasmic to the non- cytoplasmic compartment (cf. EC 1.6.99.3).

UniProtKB Entries (1)

P0CY49
CY1_RHOCA
Rhodobacter capsulatus
Cytochrome c1

PDB Structure

PDB 1ZRT
External Links
Method X-RAY DIFFRACTION
Organism Rhodobacter
Primary Citation
X-Ray Structure of Rhodobacter Capsulatus Cytochrome bc (1): Comparison with its Mitochondrial and Chloroplast Counterparts.
Berry, E.A., Huang, L.S., Saechao, L.K., Pon, N.G., Valkova-Valchanova, M., Daldal, F.
Photosynth.Res.