Putative 8-oxo-dGTP diphosphatase YtkD

UniProtKB accession:  O35013

Grouped By:  Matching UniProtKB accession

UniProtKB description:  Involved in the GO system responsible for removing an oxidatively damaged form of guanine (7,8-dihydro-8-oxoguanine, 8-oxo-dGTP) from DNA and the nucleotide pool. 8-oxo-dGTP is inserted opposite dA and dC residues of template DNA with almost equal efficiency thus leading to A.T to G.C transversions (By similarity). Functions, in conjunction with MutT, to protect vegetatively growing cells from DNA-damaging agents such as H(2)O(2) or t-BHP (t-butylhydroperoxide). The 2 proteins do not however protect spores. According to PubMed:15576788, phosphohydrolase that catalyzes the hydrolysis of all common nucleoside triphosphates as well as of the mutagenic analog 8-oxo-dGTP. The high catalytic efficiency on dGTP is in contrast to results from PubMed:14761999. According to PubMed:14761999, catalyzes the hydrolysis of 8-oxo-dGTP with a specific activity 413 times higher than that exhibited against dGTP. Preferentially catalyzes the hydrolysis of 8-oxo-dGTP and 8-oxo-GTP. According to PubMed:15576788, hydrolyzes nucleoside triphosphates in a stepwise fashion through the diphosphate to the monophosphate, releasing two molecules of inorganic orthophosphate.