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ENZYME

ENZYME entry: EC 7.1.1.3

PURL: https://purl.expasy.org/enzyme/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 + O2 + n H(+)(in) = 2 a ubiquinone + 2 H2O + n H(+)(out)
Comment(s)
  • Contains a dinuclear center comprising heme and copper.
  • 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) of enzymes that have been characterized so far is 2. 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
KEGG Ligand Database for Enzyme Nomenclature7.1.1.3
IUBMB Enzyme Nomenclature7.1.1.3
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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