Deoxyribonuclease which catalyzes (in vitro) the decatenation of kinetoplast DNA, which are circular DNA catenated to each other, producing linear DNA molecules (By similarity). Plays an important role in chromosomal segregation and cell cycle progression during eye development probably via its DNA decatenation activity (By similarity). Binds 2 divalent metal cations per subunit. Belongs to the metallo-dependent hydrolases superfamily. TatD-type hydrolase family.