The Enzyme Database

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Accepted name: thymine dioxygenase
Reaction: thymine + 2-oxoglutarate + O2 = 5-hydroxymethyluracil + succinate + CO2
Other name(s): thymine 7-hydroxylase; 5-hydroxy-methyluracil dioxygenase; 5-hydroxymethyluracil oxygenase
Systematic name: thymine,2-oxoglutarate:oxygen oxidoreductase (7-hydroxylating)
Comments: Requires Fe2+ and ascorbate. Also acts on 5-hydroxymethyluracil to oxidize its -CH2OH group first to -CHO and then to -COOH.
Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, CAS registry number: 37256-67-0
1.  Bankel, L., Holme, E., Lindstedt, G. and Lindstedt, S. Oxygenases involved in thymine and thymidine metabolism in Neurospora crassa. FEBS Lett. 21 (1972) 135–138. [PMID: 11946494]
2.  Liu, C.-K., Hsu, C.-A. and Abbott, M.T. Catalysis of three sequential dioxygenase reactions by thymine 7-hydroxylase. Arch. Biochem. Biophys. 159 (1973) 180–187. [PMID: 4274083]
3.  Warn-Cramer, B.J., Macrander, L.A. and Abbott, M.T. Markedly different ascorbate dependencies of the sequential α-ketoglutarate dioxygenase reactions catalyzed by an essentially homogeneous thymine 7-hydroxylase from Rhodotorula glutinis. J. Biol. Chem. 258 (1983) 10551–10557. [PMID: 6684117]
[EC created 1972, modified 1976 (EC created 1972, incorporated 1976)]

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