IUBMB Enzyme Nomenclature


Accepted name: dihydroneopterin triphosphate diphosphatase

Reaction: 7,8-dihydroneopterin 3'-triphosphate + H2O = 7,8-dihydroneopterin 3'-phosphate + diphosphate

Other name(s): folQ (gene name); nudB (gene name); NUDT1 (gene name); dihydroneopterin triphosphate pyrophosphohydrolase

Systematic name: 7,8-dihydroneopterin 3'-triphosphate diphosphohydrolase

Comments: The enzyme participates in a folate biosynthesis pathway, which is found in bacteria, fungi, and plants. Requires Mg2+.

Links to other databases: BRENDA, EXPASY, KEGG, MetaCyc, PDB, CAS registry number:


1. Suzuki, Y. and Brown, G.M. The biosynthesis of folic acid. XII. Purification and properties of dihydroneopterin triphosphate pyrophosphohydrolase. J. Biol. Chem. 249 (1974) 2405-2410. [PMID: 4362677]

2. O'Handley, S.F., Frick, D.N., Bullions, L.C., Mildvan, A.S. and Bessman, M.J. Escherichia coli orf17 codes for a nucleoside triphosphate pyrophosphohydrolase member of the MutT family of proteins. Cloning, purification, and characterization of the enzyme. J. Biol. Chem. 271 (1996) 24649-24654. [PMID: 8798731]

3. Klaus, S.M., Wegkamp, A., Sybesma, W., Hugenholtz, J., Gregory, J.F., 3rd and Hanson, A.D. A nudix enzyme removes pyrophosphate from dihydroneopterin triphosphate in the folate synthesis pathway of bacteria and plants. J. Biol. Chem. 280 (2005) 5274-5280. [PMID: 15611104]

4. Gabelli, S.B., Bianchet, M.A., Xu, W., Dunn, C.A., Niu, Z.D., Amzel, L.M. and Bessman, M.J. Structure and function of the E. coli dihydroneopterin triphosphate pyrophosphatase: a Nudix enzyme involved in folate biosynthesis. Structure 15 (2007) 1014-1022. [PMID: 17698004]

[EC created 2014]

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