ExplorEnz: EC 4.1.2.25

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4.1.2.25

Accepted name:

dihydroneopterin aldolase

Reaction:

7,8-dihydroneopterin = 6-(hydroxymethyl)-7,8-dihydropterin + glycolaldehyde

For diagram of folate biosynthesis (late stages), click here and for diagram of methanopterin biosynthesis (part 1), click here

Other name(s):

7,8-dihydroneopterin aldolase; 2-amino-4-hydroxy-6-(D-erythro-1,2,3-trihydroxypropyl)-7,8-dihydropteridine glycolaldehyde-lyase; 2-amino-4-hydroxy-6-(D-erythro-1,2,3-trihydroxypropyl)-7,8-dihydropteridine glycolaldehyde-lyase (2-amino-4-hydroxy-6-hydroxymethyl-7,8-dihydropteridine-forming); DHNA; mptD (gene name); folB (gene name)

Systematic name:

7,8-dihydroneopterin glycolaldehyde-lyase [6-(hydroxymethyl)-7,8-dihydropterin-forming]

Comments:

The enzyme participates in folate (in bacteria, plants and fungi) and methanopterin (in archaea) biosynthesis. The enzymes from the bacterium Escherichia coli and the plant Arabidopsis thaliana also catalyse the epimerisation of the 2′ hydroxy-group (EC 5.1.99.8, 7,8-dihydroneopterin epimerase) [2,3]. The enzyme from the bacterium Mycobacterium tuberculosis is trifunctional and also catalyses EC 5.1.99.8 and EC 1.13.11.81, 7,8-dihydroneopterin oxygenase [6]. The enzyme from the yeast Saccharomyces cerevisiae also catalyses the two subsequent steps in the folate biosynthesis pathway - EC 2.7.6.3, 2-amino-4-hydroxy-6-(hydroxymethyl)dihydropteridine diphosphokinase, and EC 2.5.1.15, dihydropteroate synthase [4].

Links to other databases:

BRENDA, EAWAG-BBD, EXPASY, KEGG, MetaCyc, PDB, CAS registry number: 37290-59-8

References:

1.	Mathis, J.B. and Brown, G.M. The biosynthesis of folic acid. XI. Purification and properties of dihydroneopterin aldolase. J. Biol. Chem. 245 (1970) 3015–3025. [PMID: 4912541]
2.	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. [DOI] [PMID: 9651328]
3.	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. [DOI] [PMID: 15107504]
4.	Güldener, U., Koehler, G.J., Haussmann, C., Bacher, A., Kricke, J., Becher, D. and Hegemann, J.H. Characterization of the Saccharomyces cerevisiae Fol1 protein: starvation for C₁ carrier induces pseudohyphal growth. Mol. Biol. Cell 15 (2004) 3811–3828. [DOI] [PMID: 15169867]
5.	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. [DOI] [PMID: 23150985]
6.	Wang, Y., Xu, H., Grochowski, L.L. and White, R.H. Biochemical characterization of a dihydroneopterin aldolase used for methanopterin biosynthesis in methanogens. J. Bacteriol. 196 (2014) 3191–3198. [DOI] [PMID: 24982305]
7.	Blaszczyk, J., Lu, Z., Li, Y., Yan, H. and Ji, X. Crystallographic and molecular dynamics simulation analysis of Escherichia coli dihydroneopterin aldolase. Cell Biosci 4:52 (2014). [DOI] [PMID: 25264482]

[EC 4.1.2.25 created 1972, modified 2015]