Has both endo- and exonuclease activities. Incises double-stranded DNA without obvious specificity via its endonuclease activity and excises the DNA from the 3'-to 5'-end by its exonuclease activity. May have a role in apoptosis. Divalent metal cations. Has optimal activity with Mg(2+). Optimum pH is 5. Optimum temperature is 30 degrees Celsius. Present with 1460 molecules/cell in log phase SD medium. Belongs to the metallo-dependent hydrolases superfamily. TatD-type hydrolase family.