In enzymology, a hydroxyquinol 1,2-dioxygenase (EC 1.13.11.37) is an enzyme that catalyzes the chemical reaction Thus, the two substrates of this enzyme are benzene-1,2,4-triol (hydroxyquinol) and O2, whereas its product is 3-hydroxy-cis,cis-muconate.
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 systematic name of this enzyme class is benzene-1,2,4-triol:oxygen 1,2-oxidoreductase (decyclizing).
As of late 2007[update], only one structure has been solved for this class of enzymes, with the PDB accession code 1TMX.
This EC 1.13 enzyme-related article is a stub.