Tags: Enzyme.
In enzymology a protocatechuate 45-dioxygenase (EC 1.13.11.8) is an enzyme that catalyzes the chemical reactionprotocatechuate + O2 4-carboxy-2-hydroxymuconate semialdehydeThus the two substrates of this enzyme are protocatechuate and O2 whereas its product is 4-carboxy-2-hydroxymuconate 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).