InChI=1S/C10H16N5O14P3/c11-7-4-8(14-10(18)13-7)15(2-12-4)9-6(17)5(16)3(27-9)1-26-31(22,23)29-32(24,25)28-30(19,20)21/h2-3,5-6,9,16-17H,1H2,(H,22,23)(H,24,25)(H2,19,20,21)(H3,11,13,14,18)/p-4/t3-,5-,6-,9-/m1/s1 |
DJHOBIUAJLDRDQ-UUOKFMHZSA-J |
NC1=NC(NC2=C1N=CN2[C@@H]3O[C@H](COP(=O)(OP(=O)(OP(=O)([O-])[O-])[O-])[O-])[C@@H](O)[C@H]3O)=O |
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2-oxo-adenosine 5'-triphosphate tetraanion
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SUBMITTER
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2-oxo-ATP
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UniProt
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2-oxo-ATP tetraanion
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SUBMITTER
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Fujikawa K, Kamiya H, Yakushiji H, Nakabeppu Y, Kasai H (2001) Human MTH1 protein hydrolyzes the oxidized ribonucleotide, 2-hydroxy-ATP. Nucleic acids research 29, 449-454 (Source: SUBMITTER) [PubMed:11139615] [show Abstract] The human nucleotide pool sanitization enzyme, MTH1, hydrolyzes 2-hydroxy-dATP and 8-hydroxy-dATP in addition to 8-hydroxy-dGTP. We report here that human MTH1 is highly specific for 2-hydroxy-ATP, among the cognate ribonucleoside triphosphates. The pyrophosphatase activities for 8-hydroxy-GTP, 2-hydroxy-ATP and 8-hydroxy-ATP were measured by high-performance liquid chromatography. The kinetic parameters thus obtained indicate that the catalytic efficiencies of MTH1 are in the order of 2-hydroxy-dATP > 2-hydroxy-ATP > 8-hydroxy-dGTP > 8-hydroxy-dATP >> dGTP > 8-hydroxy-GTP > 8-hydroxy-ATP. Notably, MTH1 had the highest affinity for 2-hydroxy-ATP among the known substrates. ATP is involved in energy metabolism and signal transduction, and is a precursor in RNA synthesis. We suggest that the 2-hydroxy-ATP hydrolyzing activity of MTH1 might prevent the perturbation of these ATP-related pathways by the oxidized ATP. |
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