Plays a key role in virus oncogenecity in animals. Binds and sequesters human MUPP1/MPDZ protein in the cytoplasm, preventing it from playing a role in cellular proliferation regulation. Induces cell transformation, probably by inactivating MPDZ protein. dUTP + H2O = diphosphate + dUMP + H(+) Binds to human MPDZ. Belongs to the dUTPase family.