Dihydropyrimidinase

dihydropyrimidinase
Identifiers
EC number	3.5.2.2
CAS number	9030-74-4
Databases
IntEnz	IntEnz view
BRENDA	BRENDA entry
ExPASy	NiceZyme view
KEGG	KEGG entry
MetaCyc	metabolic pathway
PRIAM	profile
PDB structures	RCSB PDB PDBe PDBsum
Gene Ontology	AmiGO / EGO
Search PMC articles PubMed articles

In enzymology, a dihydropyrimidinase (EC 3.5.2.2) is an enzyme that catalyzes the chemical reaction

5,6-dihydrouracil + H₂O $\rightleftharpoons$ 3-ureidopropanoate

Thus, the two substrates of this enzyme are 5,6-dihydrouracil and H₂O, whereas its product is 3-ureidopropanoate.

This enzyme belongs to the family of hydrolases, those acting on carbon-nitrogen bonds other than peptide bonds, specifically in cyclic amides. The systematic name of this enzyme class is 5,6-dihydropyrimidine amidohydrolase. Other names in common use include hydantoinase, hydropyrimidine hydrase, hydantoin peptidase, pyrimidine hydrase, and D-hydantoinase. This enzyme participates in 3 metabolic pathways: pyrimidine metabolism, beta-alanine metabolism, and pantothenate and coa biosynthesis.

Structural studies

As of late 2007, 10 structures have been solved for this class of enzymes, with PDB accession codes 1GKP, 1GKQ, 1GKR, 1NFG, 1YNY, 2FTW, 2FTY, 2FVK, 2FVM, and 2GSE.

References

• Brooks KP, Jones EA, Kim BD, Sander EG (1983). "Bovine liver dihydropyrimidine amidohydrolase: purification, properties, and characterization as a zinc metalloenzyme". Arch. Biochem. Biophys. 226 (2): 469–83. doi:10.1016/0003-9861(83)90316-8. PMID 6639068. 
• EADIE GS, BERNHEIM F, BERNHEIM ML (1949). "The partial purification and properties of animal and plant hydantoinases". J. Biol. Chem. 181 (2): 449–58. PMID 15393763. 

Pyrimidine metabolism

Anabolism	CAD (Carbamoyl phosphate synthase II, Aspartate carbamoyltransferase, Dihydroorotase) Dihydroorotate dehydrogenase · Orotidine 5'-phosphate decarboxylase/Uridine monophosphate synthetase CTP synthase
Catabolism	Dihydropyrimidine dehydrogenase · Dihydropyrimidinase/DPYS · Beta-ureidopropionase/UPB1

Deoxyribonucleotides

Ribonucleotide reductase · Nucleoside-diphosphate kinase · DCMP deaminase · Thymidylate synthase · Dihydrofolate reductase

M: MET mt, k, c/g/r/p/y/i, f/h/s/l/o/e, a/u, n, m k, cgrp/y/i, f/h/s/l/o/e, au, n, m, epon m(A16/C10),i(k, c/g/r/p/y/i, f/h/s/o/e, a/u, n, m)