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Catalysis of the four-electron reduction of dioxygen (O2) to water, coupled to generation of a proton electrochemical gradient across a membrane. Catalysis of the reaction: ubiquinol + O2 = ubiquinone + 2 H2R; cytochrome O is the electron acceptor. Catalysis of the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: 4 ferrocytochrome c + O2 = 4 ferricytochrome c + 2 H2O. Catalysis of an oxidation-reduction (redox) reaction, a reversible chemical reaction in which the oxidation state of an atom or atoms within a molecule is altered. One substrate acts as a hydrogen or electron donor and becomes oxidized, while the other acts as hydrogen or electron acceptor and becomes reduced. Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: heme-copper terminal oxidase activity
Acc: GO:0015002
Aspect: Molecular Function
Desc: Catalysis of the four-electron reduction of dioxygen (O2) to water, coupled to generation of a proton electrochemical gradient across a membrane.
Synonyms:
  • haem-copper terminal oxidase activity
Proteins in PDR annotated with:
   This term: 2 [Search]
   Term or descendants: 207 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0015002 - heme-copper terminal oxidase activity (interactive image map)
YRC Informatics Platform - Version 3.0
Created and Maintained by: Michael Riffle