EC 7.1.1.8: Quinol--cytochrome-c reductase
Reaction catalysed:
Quinol + 2 ferricytochrome c(Side 2) = quinone + 2 ferrocytochrome c(Side 2) + 2 H(+)(Side 2)
Systematic name:
Quinol:ferricytochrome-c oxidoreductase
Alternative Name(s):
- CoQH(2)--cytochrome c oxidoreductase
- Coenzyme Q--cytochrome c reductase
- Coenzyme QH(2)--cytochrome c reductase
- Complex III (mitochondrial electron transport)
- Cytochrome bc1 complex
- Dihydrocoenzyme Q--cytochrome c reductase
- Mitochondrial electron transport complex III
- QH(2):cytochrome c oxidoreductase
- Reduced coenzyme Q-cytochrome c reductase
- Reduced ubiquinone--cytochrome c oxidoreductase
- Reduced ubiquinone--cytochrome c reductase, complex III (mitochondrial electron transport)
- Ubihydroquinol:cytochrome c oxidoreductase
- Ubiquinol--cytochrome c oxidoreductase
- Ubiquinol--cytochrome c-2 oxidoreductase
- Ubiquinol--cytochrome c1 oxidoreductase
- Ubiquinol--cytochrome c2 reductase
- Ubiquinol--cytochrome-c reductase
- Ubiquinol:ferricytochrome-c oxidoreductase
- Ubiquinone--cytochrome b-c(1) oxidoreductase
- Ubiquinone--cytochrome c oxidoreductase
- Ubiquinone--cytochrome-c oxidoreductase
- Ubiquinone-cytochrome c reductase
GO terms
Biochemical function:
Biological process:
Cellular component:
Sequence families
Protein families (Pfam)
InterPro annotations
IPR036811
Domain description:
Ubiquinol-cytochrome C reductase hinge domain superfamily
Occurring in:
Occurring in:
IPR015248
Domain description:
Ubiquinol-cytochrome c reductase iron-sulphur subunit, N-terminal
Occurring in:
Occurring in:
IPR004192
Domain description:
Cytochrome b-c1 complex subunit Rieske, transmembrane domain
Occurring in:
Occurring in:
IPR037008
Domain description:
Cytochrome bc1 complex subunit Rieske, transmembrane domain superfamily
Occurring in:
Occurring in:
Structure domains
CATH domains
3.30.830.10
Class:
Alpha Beta
Architecture:
2-Layer Sandwich
Topology:
Cytochrome Bc1 Complex; Chain A, domain 1
Homology:
Metalloenzyme, LuxS/M16 peptidase-like
Occurring in:
1.20.5.220
Class:
Mainly Alpha
Architecture:
Up-down Bundle
Topology:
Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homology:
Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Occurring in:
1.20.5.260
Class:
Mainly Alpha
Architecture:
Up-down Bundle
Topology:
Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homology:
Cytochrome b-c1 complex subunit 9
Occurring in:
2.10.210.10
Class:
Mainly Beta
Architecture:
Ribbon
Topology:
Cytochrome Bc1 Complex; Chain I
Homology:
Cytochrome Bc1 Complex; Chain I
Occurring in:
1.10.287.20
Class:
Mainly Alpha
Architecture:
Orthogonal Bundle
Topology:
Helix Hairpins
Homology:
Ubiquinol-cytochrome C reductase hinge domain
Occurring in:
1.20.5.210
Class:
Mainly Alpha
Architecture:
Up-down Bundle
Topology:
Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homology:
Cytochrome b-c1 complex subunit 8
Occurring in:
1.10.1090.10
Class:
Mainly Alpha
Architecture:
Orthogonal Bundle
Topology:
Cytochrome Bc1 Complex; Chain F
Homology:
Cytochrome b-c1 complex subunit 7
Occurring in:
2.102.10.10
Class:
Mainly Beta
Architecture:
3-layer Sandwich
Topology:
Rieske Iron-sulfur Protein
Homology:
Rieske [2Fe-2S] iron-sulphur domain
Occurring in:
1.20.5.270
Class:
Mainly Alpha
Architecture:
Up-down Bundle
Topology:
Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homology:
Ubiquinol cytochrome reductase, transmembrane domain
Occurring in:
1.20.5.100
Class:
Mainly Alpha
Architecture:
Up-down Bundle
Topology:
Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homology:
Cytochrome c1, transmembrane anchor, C-terminal
Occurring in:
1.10.760.10
Class:
Mainly Alpha
Architecture:
Orthogonal Bundle
Topology:
Cytochrome Bc1 Complex; Chain D, domain 2
Homology:
Cytochrome c-like domain
Occurring in:
SCOP annotations
63412
Class:
Alpha and beta proteins (a+b)
Fold:
LuxS/MPP-like metallohydrolase
Superfamily:
LuxS/MPP-like metallohydrolase
Occurring in:
81517
Class:
Membrane and cell surface proteins and peptides
Fold:
Single transmembrane helix
Superfamily:
Subunit XI (6.4 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Occurring in:
81513
Class:
Membrane and cell surface proteins and peptides
Fold:
Single transmembrane helix
Superfamily:
Subunit X (non-heme 7 kDa protein) of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Occurring in:
90077
Class:
Alpha and beta proteins (a+b)
Fold:
Non-globular alpha+beta subunits of globular proteins
Superfamily:
Non-globular alpha+beta subunits of globular proteins
Occurring in:
81530
Class:
Membrane and cell surface proteins and peptides
Fold:
Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Superfamily:
Non-heme 11 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Occurring in:
81507
Class:
Membrane and cell surface proteins and peptides
Fold:
Single transmembrane helix
Superfamily:
Ubiquinone-binding protein QP-C of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Occurring in:
81523
Class:
Membrane and cell surface proteins and peptides
Fold:
14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Superfamily:
14 kDa protein of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Occurring in:
81501
Class:
Membrane and cell surface proteins and peptides
Fold:
Single transmembrane helix
Superfamily:
ISP transmembrane anchor
Occurring in:
81495
Class:
Membrane and cell surface proteins and peptides
Fold:
Single transmembrane helix
Superfamily:
Cytochrome c1 subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase), transmembrane anchor
Occurring in:
81647
Class:
Membrane and cell surface proteins and peptides
Fold:
a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Superfamily:
a domain/subunit of cytochrome bc1 complex (Ubiquinol-cytochrome c reductase)
Occurring in:
81642
Class:
Membrane and cell surface proteins and peptides
Fold:
Heme-binding four-helical bundle
Superfamily:
Transmembrane di-heme cytochromes
Occurring in: