Ascorbate 2,3-dioxygenase

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
ascorbate 2,3-dioxygenase
EC no.
CAS no.37256-55-6
IntEnzIntEnz view
ExPASyNiceZyme view
MetaCycmetabolic pathway
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO

Ascorbate 2,3-dioxygenase (EC is an enzyme that catalyzes the chemical reaction

ascorbate + O2 + H2O oxalate + threonate

The 3 substrates of this enzyme are ascorbate, oxygen, and water, whereas its two products are oxalate and threonate.

This enzyme belongs to the family of oxidoreductases, specifically those acting on single donors with O2 as oxidant and incorporation of two atoms of oxygen into the substrate (oxygenases). The oxygen incorporated need not be derived from O2. The systematic name of this enzyme class is ascorbate:oxygen 2,3-oxidoreductase (bond-cleaving). This enzyme is also called AAoxygenase. This enzyme participates in ascorbate and aldarate metabolism. It employs one cofactor, iron.


  • White GA, Krupka RM (1965). "Ascorbic acid oxidase and ascorbic acid oxygenase of Myrothecium verrucaria". Arch. Biochem. Biophys. 110 (3): 448–61. doi:10.1016/0003-9861(65)90436-4. PMID 5891457.