Involved in the DNA repair system to avoid A.T to G.C transversions. Degrades 8-oxo-dGTP to the monophosphate, but is also active on all of the nucleoside triphosphates (By similarity). 8-oxo-dGTP + H2O = 8-oxo-dGMP + diphosphate + H(+) Homotrimer. Belongs to the Nudix hydrolase family.