› › Function and Biology

cytochrome bc1-cbb3 supercomplex from Pseudomonas aeruginosa

Source organism: Pseudomonas aeruginosa
Biochemical function: metal ion binding
Biological process: proton transmembrane transport
Cellular component: membrane

Quick links

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

EC 7.1.1.9: Cytochrome-c oxidase

Reaction catalysed:
4 ferrocytochrome c + O(2) + 8 H(+)(Side 1) = 4 ferricytochrome c + 4 H(2)O(Side 2)
Systematic name:
Ferrocytochrome-c:oxygen oxidoreductase
Alternative Name(s):
  • Complex IV (mitochondrial electron transport)
  • Cytochrome a3
  • Cytochrome aa3
  • Cytochrome ba(3)
  • Cytochrome bb3
  • Cytochrome caa(3)
  • Cytochrome cbb(3)
  • Cytochrome oxidase
  • Ferrocytochrome c oxidase
  • Indophenol oxidase
  • Indophenolase
  • NADH cytochrome c oxidase
  • Warburg's respiratory enzyme

GO terms

Biochemical function:
Biological process:
Cellular component:

Sequence families

Pfam Protein families (Pfam)
PF00034
Domain description: Cytochrome c
Occurring in:
  1. Cytochrome c4
The deposited structure of PDB entry 8smr contains 4 copies of Pfam domain PF00034 (Cytochrome c) in Cytochrome c4. Showing 2 copies in chain D [auth K].

PF02167
Domain description: Cytochrome C1 family
Occurring in:
  1. Probable cytochrome c1
The deposited structure of PDB entry 8smr contains 4 copies of Pfam domain PF02167 (Cytochrome C1 family) in Probable cytochrome c1. Showing 2 copies in chain C [auth J].

PF13442
Domain description: Cytochrome C oxidase, cbb3-type, subunit III
Occurring in:
  1. Cbb3-type cytochrome c oxidase subunit
  2. Cytochrome c domain-containing protein
The deposited structure of PDB entry 8smr contains 2 copies of Pfam domain PF13442 (Cytochrome C oxidase, cbb3-type, subunit III ) in Cytochrome c domain-containing protein. Showing 1 copy in chain E [auth L] (this domain is out of the observed residue ranges!).
The deposited structure of PDB entry 8smr contains 2 copies of Pfam domain PF13442 (Cytochrome C oxidase, cbb3-type, subunit III ) in Cbb3-type cytochrome c oxidase subunit. Showing 2 copies in chain M [auth G].

PF00032
Domain description: Cytochrome b(C-terminal)/b6/petD
Occurring in:
  1. Cytochrome b
The deposited structure of PDB entry 8smr contains 2 copies of Pfam domain PF00032 (Cytochrome b(C-terminal)/b6/petD) in Cytochrome b. Showing 1 copy in chain G [auth D].

PF00033
Domain description: Cytochrome b/b6/petB
Occurring in:
  1. Cytochrome b
The deposited structure of PDB entry 8smr contains 2 copies of Pfam domain PF00033 (Cytochrome b/b6/petB) in Cytochrome b. Showing 1 copy in chain G [auth D].

PF00355
Domain description: Rieske [2Fe-2S] domain
Occurring in:
  1. Ubiquinol-cytochrome c reductase iron-sulfur subunit
The deposited structure of PDB entry 8smr contains 2 copies of Pfam domain PF00355 (Rieske [2Fe-2S] domain) in Ubiquinol-cytochrome c reductase iron-sulfur subunit. Showing 1 copy in chain F [auth Z].

PF10399
Domain description: Ubiquitinol-cytochrome C reductase Fe-S subunit TAT signal
Occurring in:
  1. Ubiquinol-cytochrome c reductase iron-sulfur subunit
The deposited structure of PDB entry 8smr contains 2 copies of Pfam domain PF10399 (Ubiquitinol-cytochrome C reductase Fe-S subunit TAT signal) in Ubiquinol-cytochrome c reductase iron-sulfur subunit. Showing 1 copy in chain F [auth Z].

PF14715
Domain description: N-terminal domain of cytochrome oxidase-cbb3, FixP
Occurring in:
  1. Cbb3-type cytochrome c oxidase subunit
The deposited structure of PDB entry 8smr contains 1 copy of Pfam domain PF14715 (N-terminal domain of cytochrome oxidase-cbb3, FixP ) in Cbb3-type cytochrome c oxidase subunit. Showing 1 copy in chain M [auth G].

PF02433
Domain description: Cytochrome C oxidase, mono-heme subunit/FixO
Occurring in:
  1. Cytochrome c domain-containing protein
The deposited structure of PDB entry 8smr contains 1 copy of Pfam domain PF02433 (Cytochrome C oxidase, mono-heme subunit/FixO) in Cytochrome c domain-containing protein. Showing 1 copy in chain L [auth F].

PF00115
Domain description: Cytochrome C and Quinol oxidase polypeptide I
Occurring in:
  1. cytochrome-c oxidase
The deposited structure of PDB entry 8smr contains 1 copy of Pfam domain PF00115 (Cytochrome C and Quinol oxidase polypeptide I) in cytochrome-c oxidase. Showing 1 copy in chain K [auth E].

Quick links