TRZ/ATZ family contains enzymes from the atrazine degradation pathway and related hydrolases. Atrazine, a chlorinated herbizide, can be catabolized by a variety of different bacteria. The first three steps of the atrazine dehalogenation pathway are catalyzed by atrazine chlorohydrolase (AtzA), hydroxyatrazine ethylaminohydrolase (AtzB), and N-isopropylammelide N-isopropylaminohydrolase (AtzC). All three enzymes belong to the superfamily of metal dependent hydrolases. AtzA and AtzB, beside other related enzymes are represented in this CD.