|Superclasses:||Reactions Classified By Conversion Type → Simple Reactions → Chemical Reactions|
|Reactions Classified By Substrate → Small-Molecule Reactions|
EC Number: 18.104.22.168
The direction shown, i.e. which substrates are on the left and right sides, is in accordance with the direction in which it was curated.
Most BioCyc compounds have been protonated to a reference pH value of 7.3. Please see the PGDB Concepts Guide for more information.
Mass balance status: Balanced.
Enzyme Commission Primary Name: 8-oxo-dGTP diphosphatase
Enzyme Commission Synonyms: MutT, 7,8-dihydro-8-oxoguanine triphosphatase, 8-oxo-dGTPase, 7,8-dihydro-8-oxo-dGTP pyrophosphohydrolase
Enzyme Commission Summary:
The MutT protein hydrolyses the phosphoanhydride bond between the α and β phosphate of 8-oxoguanine-containing nucleoside di- and triphosphates thereby preventing misincorporation of the oxidized purine nucleoside triphosphates into DNA . It does not hydrolyse 2-hydroxy-dATP (cf. EC 22.214.171.124, 2-hydroxy-dATP diphosphatase) [Yonekura10]. Requires Mg2+.
Ito05: Ito R, Hayakawa H, Sekiguchi M, Ishibashi T (2005). "Multiple enzyme activities of Escherichia coli MutT protein for sanitization of DNA and RNA precursor pools." Biochemistry 44(17);6670-4. PMID: 15850400
Kang95a: Kang D, Nishida J, Iyama A, Nakabeppu Y, Furuichi M, Fujiwara T, Sekiguchi M, Takeshige K (1995). "Intracellular localization of 8-oxo-dGTPase in human cells, with special reference to the role of the enzyme in mitochondria." J Biol Chem 270(24);14659-65. PMID: 7782328
Nakamura10: Nakamura T, Meshitsuka S, Kitagawa S, Abe N, Yamada J, Ishino T, Nakano H, Tsuzuki T, Doi T, Kobayashi Y, Fujii S, Sekiguchi M, Yamagata Y (2010). "Structural and dynamic features of the MutT protein in the recognition of nucleotides with the mutagenic 8-oxoguanine base." J Biol Chem 285(1);444-52. PMID: 19864691
Yonekura10: Yonekura S, Sanada U, Zhang-Akiyama QM (2010). "CiMutT, an asidian MutT homologue, has a 7, 8-dihydro-8-oxo-dGTP pyrophosphohydrolase activity responsible for sanitization of oxidized nucleotides in Ciona intestinalis." Genes Genet Syst 85(4);287-95. PMID: 21178309
Yoshimura07a: Yoshimura K, Ogawa T, Ueda Y, Shigeoka S (2007). "AtNUDX1, an 8-oxo-7,8-dihydro-2'-deoxyguanosine 5'-triphosphate pyrophosphohydrolase, is responsible for eliminating oxidized nucleotides in Arabidopsis." Plant Cell Physiol 48(10);1438-49. PMID: 17804481
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