IUBMB Enzyme Nomenclature


Accepted name: 6-pyruvoyltetrahydropterin synthase

Reaction: 7,8-dihydroneopterin 3'-triphosphate = 6-pyruvoyl-5,6,7,8-tetrahydropterin + triphosphate

For diagram of reaction click here.

Glossary: 7,8-dihydroneopterin 3'-triphosphate = 6-[(1S,2R)-1,2-dihydroxy-3-triphosphooxypropyl]-7,8-dihydropterin

Other name(s): 2-amino-4-oxo-6-[(1S,2R)-1,2-dihydroxy-3-triphosphooxypropyl]-7,8-dihydroxypteridine triphosphate lyase; 6-[(1S,2R)-1,2-dihydroxy-3-triphosphooxypropyl]-7,8-dihydroxypteridin triphosphate-lyase (6-pyruvoyl-5,6,7,8-tetrahydropterin-forming)

Systematic name: 7,8-dihydroneopterin 3'-triphosphate triphosphate-lyase (6-pyruvoyl-5,6,7,8-tetrahydropterin-forming)

Comments: Catalyses triphosphate elimination and an intramolecular redox reaction in the presence of Mg2+. It has been identified in human liver. This enzyme is involved in the de novo synthesis of tetrahydrobiopterin from GTP, with the other enzymes involved being EC (sepiapterin reductase) and EC (GTP cyclohydrolase I) [3].

Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, CAS registry number: 97089-82-2


1. Milstien, S., Kaufman, S. The biosynthesis of tetrahydrobiopterin in rat brain. Purification and characterization of 6-pyruvoyl-tetrahydrobiopterin(2'-oxo) reductase. J. Biol. Chem. 264 (1989) 8066-8073. [PMID: 2656673]

2. Thöny, B., Leimbacher, W., Bürgisser, D., Heinzmann, C.W. Human 6-pyruvoyl-tetrahydrobiopterin synthase: cDNA cloning and heterologous expression of the recombinant enzyme. Biochem. Biophys. Res. Commun. 189 (1992) 1437-1443. [PMID: 1282802]

3. Supangat, S., Choi, Y.K., Park, Y.S., Son, D., Han, C.D. and Lee, K.H. Expression, purification, crystallization and preliminary X-ray analysis of sepiapterin reductase from Chlorobium tepidum. Acta Crystallogr. Sect. F Struct. Biol. Cryst. Commun. 61 (2005) 202. [PMID: 16510994]

[EC created 1999 as EC, transferred 2000 to EC, modified 2001]

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