Nicotinamidase

nicotinamidase
Identifiers
EC number	3.5.1.19
CAS number	9033-32-3
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 / EGO
Search PMC articles PubMed articles NCBI proteins

In enzymology, a nicotinamidase (EC 3.5.1.19) is an enzyme that catalyzes the chemical reaction

nicotinamide + H₂O $\rightleftharpoons$ nicotinate + NH₃

Thus, the two substrates of this enzyme are nicotinamide and H₂O, whereas its two products are nicotinate and NH₃.

This enzyme belongs to the family of hydrolases, those acting on carbon-nitrogen bonds other than peptide bonds, specifically in linear amides. The systematic name of this enzyme class is nicotinamide amidohydrolase. Other names in common use include nicotinamide deaminase, nicotinamide amidase, and YNDase. This enzyme participates in nicotinate and nicotinamide metabolism.

Structural studies

As of late 2007, 3 structures have been solved for this class of enzymes, with PDB accession codes 1ILW, 1IM5, and 2H0R.

References

• Petrack B, Greengard P, Craston A and Sheppy F (1965). "Nicotinamide deamidase from mammalian liver". J. Biol. Chem. 240: 1725–1730. PMID 14285515.
• Sarma DSR, Rajalakshmi S and Sarma S (1964). "Studies on the enzymes involved in nicotinamide adenine dinucleotide metabolism in Aspergillus niger". Biochim. Biophys. Acta 81: 311–322. doi:10.1016/0926-6569(64)90047-1.