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ENZYME

ENZYME entry: EC 7.1.1.3

Accepted Name
ubiquinol oxidase (H(+)-transporting)
Alternative Name(s)
cytochrome bb3 oxidase
cytochrome bo3 oxidase
cytochrome bo oxidase
Reaction catalysed
2 a ubiquinol + n H(+)(in) + O2 <=> 2 a ubiquinone + n H(+)(out) + 2 H2O
Comment(s)
  • This terminal oxidase enzyme generates proton motive force by two mechanisms: (1) transmembrane charge separation resulting from utilizing protons and electrons originating from opposite sides of the membrane to generate water, and (2) active pumping of protons across the membrane.
  • The bioenergetic efficiency (the number of charges driven across the membrane per electron used to reduce oxygen to water) depends on the enzyme; for example, for the bo3 oxidase it is 2, while for the bd-II oxidase it is 1. cf. EC 7.1.1.7.
  • Formerly EC 1.10.3.10.
Cross-references
BRENDA7.1.1.3
EC2PDB7.1.1.3
ExplorEnz7.1.1.3
PRIAM enzyme-specific profiles7.1.1.3
KEGG Ligand Database for Enzyme Nomenclature7.1.1.3
IUBMB Enzyme Nomenclature7.1.1.3
IntEnz7.1.1.3
MEDLINEFind literature relating to 7.1.1.3
MetaCyc7.1.1.3
Rhea expert-curated reactions7.1.1.3
UniProtKB/Swiss-Prot
P26458, APPB_ECOLIP26459, APPC_ECOLIP57543, CYOB_BUCAI
Q8K994, CYOB_BUCAPQ89AA4, CYOB_BUCBPP0ABJ0, CYOB_ECO57
P0ABI9, CYOB_ECOL6P0ABI8, CYOB_ECOLIQ9I426, CYOB_PSEAE
Q9WWR2, CYOB_PSEPU

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