Oxidized purine nucleoside triphosphate hydrolase which is a prominent sanitizer of the oxidized nucleotide pool (PubMed:
8226881, PubMed:
7713500, PubMed:
10608900, PubMed:
12857738, PubMed:
22556419, PubMed:
26238318, PubMed:
24695224, PubMed:
24695225, PubMed:
28679043). Catalyzes the hydrolysis of 2-oxo-dATP (2-hydroxy-dATP) into 2-oxo-dAMP (PubMed:
10373420). Has also a significant hydrolase activity toward 2- oxo-ATP, 8-oxo-dGTP and 8-oxo-dATP (PubMed:
10373420, PubMed:
11139615). Through the hydrolysis of oxidized purine nucleoside triphosphates, prevents their incorporation into DNA and the subsequent transversions A:T to C:G and G:C to T:A (PubMed:
8226881, PubMed:
10373420, PubMed:
10608900, PubMed:
11756418, PubMed:
12857738, PubMed:
16607562, PubMed:
24695224, PubMed:
24695225, PubMed:
26999531, PubMed:
28035004). Also catalyzes the hydrolysis of methylated purine nucleoside triphosphate preventing their integration into DNA (PubMed:
30304478, PubMed:
32144205). Through this antimutagenic activity protects cells from oxidative stress (PubMed:
8226881, PubMed:
7713500, PubMed:
10608900, PubMed:
12857738, PubMed:
24695224, PubMed:
24695225, PubMed:
30304478, PubMed:
32144205).