Allantoinase

In enzymology, an allantoinase (EC 3.5.2.5) is an enzyme that catalyzes the chemical reaction

(S)-allantoin + H₂O ${\displaystyle \rightleftharpoons }$ allantoate

allantoinase
Allantoinase (analog) tetramer, Pseudomonas fluorescens
Identifiers
EC no.	3.5.2.5
CAS no.	9025-20-1
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 / QuickGO
Search PMC articles PubMed articles NCBI proteins

Thus, the two substrates of this enzyme are (S)-allantoin and H₂O, whereas its product is allantoate.

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 (S)-allantoin amidohydrolase. This enzyme participates in purine metabolism.