Oxidized purine nucleoside triphosphate hydrolase

UniProtKB accession:  Q7ZWC3

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UniProtKB description:  Oxidized purine nucleoside triphosphate hydrolase which is a prominent sanitizer of the oxidized nucleotide pool (PubMed:26862114, PubMed:30304478). Catalyzes the hydrolysis of 2-oxo-dATP (2-hydroxy-dATP) into 2-oxo-dAMP (PubMed:26862114). Has also a significant hydrolase activity toward 2-oxo-ATP, 8-oxo-dGTP and 8-oxo-dATP (PubMed:26862114, PubMed:30304478). 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:26862114, PubMed:30304478). Also catalyzes the hydrolysis of methylated purine nucleoside triphosphate preventing their integration into DNA (PubMed:32144205, PubMed:30304478). Through this antimutagenic activity protects cells from oxidative stress (PubMed:32144205, PubMed:26862114, PubMed:30304478).