3,4 dihydroxyphthalate decarboxylase

In enzymology, a 3,4-dihydroxyphthalate decarboxylase (EC 4.1.1.69) is an enzyme that catalyzes the chemical reaction

Hence, this enzyme has one substrate, 3,4-dihydroxyphthalate, and two products, 3,4-dihydroxybenzoate and CO₂.

This enzyme belongs to the family of lyases, specifically the carboxy-lyases, which cleave carbon-carbon bonds. The systematic name of this enzyme class is 3,4-dihydroxyphthalate carboxy-lyase (3,4-dihydroxybenzoate-forming). This enzyme is also called 3,4-dihydroxyphthalate carboxy-lyase.