Background：Aromatic-L-amino-acid decarboxylase belongs to the pyridoxal-dependent aminotransferase superfamily.DDC catalyzes the decarboxylation of L-3,4-dihydroxyphenylalanine(DOPA) to dopamine, L-5-hydroxytryptophan to serotonin and L-tryptophan to tryptamine.DDC is the cause of aromatic L-amino-acid decarboxylase deficiency(AADCD).Researches showed that Ddc is only one of the enzymes in the biosynthetic pathways for bioamines and catecholamines.
