IUBMB Enzyme Nomenclature


Accepted name: 7,8-dihydroneopterin epimerase

Reaction: 7,8-dihydroneopterin = 7,8-dihydromonapterin

Glossary: 7,8-dihydroneopterin = 2-amino-6-[(1S,2R)-1,2,3-trihydroxypropyl]-7,8-dihydropteridin-4(3H)-one
7,8-dihydromonapterin = 2-amino-6-[(1S,2S)-1,2,3-trihydroxypropyl]-7,8-dihydropteridin-4(3H)-one

Systematic name: 7,8-dihydroneopterin 2'-epimerase

Comments: The enzyme, which has been characterized in bacteria and plants, also has the activity of EC, dihydroneopterin aldolase. The enzyme from the bacterium Mycobacterium tuberculosis has an additional oxygenase function (EC, 7,8-dihydroneopterin oxygenase) [4].

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


1. Haussmann, C., Rohdich, F., Schmidt, E., Bacher, A. and Richter, G. Biosynthesis of pteridines in Escherichia coli. Structural and mechanistic similarity of dihydroneopterin-triphosphate epimerase and dihydroneopterin aldolase. J. Biol. Chem. 273 (1998) 17418-17424. [PMID: 9651328]

2. Goyer, A., Illarionova, V., Roje, S., Fischer, M., Bacher, A. and Hanson, A.D. Folate biosynthesis in higher plants. cDNA cloning, heterologous expression, and characterization of dihydroneopterin aldolases. Plant Physiol. 135 (2004) 103-111. [PMID: 15107504]

3. Czekster, C.M. and Blanchard, J.S. One substrate, five products: reactions catalyzed by the dihydroneopterin aldolase from Mycobacterium tuberculosis. J. Am. Chem. Soc. 134 (2012) 19758-19771. [PMID: 23150985]

4. Blaszczyk, J., Lu, Z., Li, Y., Yan, H. and Ji, X. Crystallographic and molecular dynamics simulation analysis of Escherichia coli dihydroneopterin aldolase. Cell Biosci 4 (2014) 52. [PMID: 25264482]

[EC created 2015]

Return to EC 5.1.99 home page
Return to EC 5.1 home page
Return to EC 5 home page
Return to Enzymes home page
Return to IUBMB Biochemical Nomenclature home page