Reaction: NUDT1 hydrolyses 2-oxo-ATP to 2-oxo-AMP
- in pathway: Phosphate bond hydrolysis by NUDT proteins
NUDT1 (MTH1) catalyzes the reaction of 2-oxo-ATP and water to form 2-oxo-AMP and PPi (pyrophosphate). Four NUDT1 proteins have been identified, encoded by a single gene with alternative start codons (Oda et al. 1999). The shortest of these, NUDT1 p18, has been shown to catalyze hydrolysis of 2-oxo-ATP (Fujikawa et al. 2001). The active enzyme is a monomer associated with a magnesium ion (Mishima et al. 2004). The longer isoforms all consist of the p18 polypeptide with aminoterminal extensions and are presumed to be active as well, but have not been experimentally characterized. The p18 isoform is predominantly cytosolic (Kang et al. 1995).
Reaction - small molecule participants:
PPi [cytosol]
H+ [cytosol]
2-oxo-AMP(2-) [cytosol]
2-oxo-ATP(4-) [cytosol]
H2O [cytosol]
Reactome.org reaction link: R-HSA-2395872
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Reaction input - small molecules:
2-oxo-ATP(4-)
water
Reaction output - small molecules:
diphosphate(3-)
hydron
2-oxo-AMP(2-)
Reactome.org link: R-HSA-2395872