Atrazine chlorohydrolase from Pseudomonas sp. strain ADP is a metalloenzyme.

Atrazine chlorohydrolase (AtzA) from Pseudomonas sp. ADP initiates the metabolism of the herbicide atrazine by catalyzing a hydrolytic dechlorination reaction to produce hydroxyatrazine. Sequence analysis revealed AtzA to be homologous to metalloenzymes within the amidohydrolase protein superfamily.