Catalysis of the reaction: a 5,6-dihydropyrimidine (5,6-dihydrouracil or 5,6-dihydrothymine) + NAD+ = a pyrimidine (uracil or thymine) + NADH + H+.

Catalysis of the oxidative demethylation of N1-methyladenine and N3-methylcytosine in DNA, with concomitant decarboxylation of 2-oxoglutarate and releases oxidized methyl group on N1-methyladenine and N3-methylcytosine as formaldehyde.

OBSOLETE. Catalysis of the hydrolysis of alkylated DNA; recognizes and removes both N-3- and N-7-methyl purines by cleaving the N-C1' glycosidic bond between the target damaged DNA base and the deoxyribose sugar. The reaction releases a free base and leaves an apurinic (AP) site.

Catalysis of the endonucleolytic cleavage at apurinic or apyrimidinic sites to products with a 5'-phosphate.

Catalysis of the reaction: methanophenazine + reduced coenzyme F420 = dihydromethanophenazine + coenzyme F420.

Catalysis of the removal of uracil from a U*G mispair by the cleavage the N-C1' glycosidic bond between the target damaged DNA base and the deoxyribose sugar. The reaction releases a free uracil and leaves an apyrimidinic (AP) site.

Catalysis of the removal of mismatched pyrimidine bases in DNA. Enzymes with this activity recognize and remove pyrimidines present in mismatches by cleaving the N-C1' glycosidic bond between the target damaged DNA base and the deoxyribose sugar. The reaction releases a free base and leaves an apyrimidinic (AP) site.

Catalysis of the reaction: 2-hydroxy-3-carboxy-6-oxo-7-methylocta-2,4-dienoate = CO2 + 2-hydroxy-6-oxo-7-methylocta-2,4-dienoate.

Catalysis of the reaction: bis(4-chlorophenyl)acetate + H+ = CO2 + bis(4-chlorophenyl)methane. Bis(4-chlorophenyl)acetate is also known as DDA; bis(4-chlorophenyl)methane is also known as DDM.

Catalysis of the reaction: 3,5-dibromo-4-hydroxybenzoate + H+ = CO2 + 2,6-dibromophenol.

Catalysis of the reaction: 2-hydroxyisobutyrate + H+ = CO2 + 2-propanol.

Catalysis of the reaction: 2-hydroxy-2-methyl-1,3-dicarbonate + H+ = CO2 + L-lactate.

Catalysis of the reaction: 5-ureido-4-imidazole carboxylate + H2O = 5-amino-4-imidazole carboxylate + NH3 + CO2.

Catalysis of the reaction: 4,5-dihydroxyphthalate = 3,4-dihydroxybenzoate + CO2.

Catalysis of the oxidative decarboxylation of 6-hydroxynicotinate to 2,5-dihydroxypyridine, dependent on O2, NADH +H+ and FAD.

Catalysis of the reaction: gallate + H(+) = CO(2) + pyrogallol.

Catalysis of the reaction: 4-hydroxybenzoate + H(+) = CO(2) + phenol.