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Cryo-EM structure of E. coli cytochrome bo3 quinol oxidase assembled in peptidiscs

Source organism: Escherichia coli BL21(DE3)
Biochemical function: cytochrome bo3 ubiquinol oxidase activity
Biological process: aerobic electron transport chain
Cellular component: membrane

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EC 7.1.1.3: Ubiquinol oxidase (H(+)-transporting)

Reaction catalysed:
2 ubiquinol + O(2) + n H(+)(Side 1) = 2 ubiquinone + 2 H(2)O + n H(+)(Side 2)
Systematic name:
Ubiquinol:oxygen oxidoreductase (H(+)-transporting)
Alternative Name(s):
  • Cytochrome bb3 oxidase
  • Cytochrome bo oxidase
  • Cytochrome bo(3) oxidase

GO terms

Sequence families

Pfam Protein families (Pfam)
PF03626
Domain description: Prokaryotic Cytochrome C oxidase subunit IV
Occurring in:
  1. Cytochrome bo(3) ubiquinol oxidase subunit 4

PF00510
Domain description: Cytochrome c oxidase subunit III
Occurring in:
  1. Cytochrome bo(3) ubiquinol oxidase subunit 3

PF06481
Domain description: COX Aromatic Rich Motif
Occurring in:
  1. Cytochrome bo(3) ubiquinol oxidase subunit 2

PF00116
Domain description: Cytochrome C oxidase subunit II, periplasmic domain
Occurring in:
  1. Cytochrome bo(3) ubiquinol oxidase subunit 2

PF00115
Domain description: Cytochrome C and Quinol oxidase polypeptide I
Occurring in:
  1. Cytochrome bo(3) ubiquinol oxidase subunit 1

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