imidazolonepropionase | |||||||||
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![]() imidazolonepropionase dimer, Agrobacterium fabrum | |||||||||
Identifiers | |||||||||
EC no. | 3.5.2.7 | ||||||||
CAS no. | 9024-91-3 | ||||||||
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 | ||||||||
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In enzymology, an imidazolonepropionase (EC 3.5.2.7) is an enzyme that catalyzes the chemical reaction
Thus, the two substrates of this enzyme are (S)-3-(5-oxo-4,5-dihydro-3H-imidazol-4-yl)propanoate and H2O, whereas its two products are N-formimidoyl-L-glutamate and H+.
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 3-(5-oxo-4,5-dihydro-3H-imidazol-4-yl)propanoate amidohydrolase. Other names in common use include 4(5)-imidazolone-5(4)-propionic acid hydrolase, and imidazolone propionic acid hydrolase. This enzyme participates in histidine metabolism.
As of late 2007, 6 structures have been solved for this class of enzymes, with PDB accession codes 2BB0, 2G3F, 2GOK, 2OOF, 2PUZ, and 2Q09.
Urocanase is the enzyme that catalyzes the second step in the degradation of histidine, the hydration of urocanate into imidazolonepropionate.
Imidazol-4-one-5-propionic acid is an intermediate in the metabolism of histidine. It is a colorless compound that is sensitive to light in air. The compound features an imidazolone ring.
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