 HAAO

3-hydroxyanthranilate 3,4-dioxygenase () is an enzyme encoded by the HAAO gene that catalyzes the chemical reaction

Thus, the two substrates of this enzyme are 3-hydroxyanthranilate and O2, whereas its product is 2-amino-3-carboxymuconate semialdehyde.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).