The enzyme, characterized from the bacterium Pseudomonas sp. ADP, participates in the degradation of cyanuric acid, an intermediate in the degradation of s-triazine herbicides such as atrazine [2-chloro-4-(ethylamino)-6-(isopropylamino)-1,3,5-triazine]. The enzyme is a heterotetramer composed of a catalytic subunit (AtzE) and an accessory subunit (AtzG) that stabilizes the complex.