NUDT1
Developmental stage
In peripheral blood lymphocytes, expressed at much higher levels in proliferating cells than in resting cells.
Function
Oxidized purine nucleoside triphosphate hydrolase which is a prominent sanitizer of the oxidized nucleotide pool (PubMed:10608900, PubMed:12857738, PubMed:22556419, PubMed:24695224, PubMed:24695225, PubMed:26238318, PubMed:28679043, PubMed:7713500, PubMed:8226881). 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:10373420, PubMed:10608900, PubMed:11756418, PubMed:12857738, PubMed:16607562, PubMed:24695224, PubMed:24695225, PubMed:26999531, PubMed:28035004, PubMed:8226881). 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:10608900, PubMed:12857738, PubMed:24695224, PubMed:24695225, PubMed:30304478, PubMed:32144205, PubMed:7713500, PubMed:8226881).
Post-translational modifications
The N-terminus is blocked.
Sequence Similarities
Belongs to the Nudix hydrolase family.
Tissue Specificity
Widely expressed with highest expression in thymus, testis, embryo and proliferating blood lymphocytes.
Cellular localization
- Isoform p18
- Cytoplasm
- Cytosol
- Mitochondrion matrix
- Nucleus
- Mostly present in cytosol (PubMed:7782328). A minor proportion is mitochondrial (PubMed:7782328). A very small amount of the protein is associated with nuclei (PubMed:7782328).
- Isoform p26
- Mitochondrion matrix
Alternative names
MTH1, NUDT1, Oxidized purine nucleoside triphosphate hydrolase, 2-hydroxy-dATP diphosphatase, 8-oxo-dGTPase, Methylated purine nucleoside triphosphate hydrolase, Nucleoside diphosphate-linked moiety X motif 1, Nudix motif 1