NAD+ synthase (glutamine-hydrolysing)

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NAD+ synthase (glutamine-hydrolyzing)
EC no.
CAS no.37318-70-0
IntEnzIntEnz view
ExPASyNiceZyme view
MetaCycmetabolic pathway
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO

In enzymology, a NAD+ synthase (glutamine-hydrolysing) (EC is an enzyme that catalyzes the chemical reaction

ATP + deamido-NAD+ + L-glutamine + H2O AMP + diphosphate + NAD+ + L-glutamate. In eukaryotes, this enzyme contains a glutaminase domain related to nitrilase.[1]

The substrates of this enzyme are ATP, deamido-NAD+, L-glutamine, and H2O, whereas its 4 products are AMP, diphosphate, NAD+, and glutamate [2]

This enzyme participates in glutamate metabolism and nicotinate and nicotinamide metabolism.


This enzyme belongs to the family of ligases, specifically those forming carbon-nitrogen bonds carbon-nitrogen ligases with glutamine as amido-N-donor. The systematic name of this enzyme class is deamido-NAD+:L-glutamine amido-ligase (AMP-forming). Other names in common use include NAD+ synthetase (glutamine-hydrolysing), nicotinamide adenine dinucleotide synthetase (glutamine), desamidonicotinamide adenine dinucleotide amidotransferase, and DPN synthetase.


  1. ^ Bieganowski P, Pace HC, Brenner C (August 2003). "Eukaryotic NAD+ synthetase Qns1 contains an essential, obligate intramolecular thiol glutamine amidotransferase domain related to nitrilase". The Journal of Biological Chemistry. 278 (35): 33049–55. doi:10.1074/jbc.m302257200. PMID 12771147.
  2. ^ Wojcik M, Seidle HF, Bieganowski P, Brenner C (November 2006). "Glutamine-dependent NAD+ synthetase. How a two-domain, three-substrate enzyme avoids waste". The Journal of Biological Chemistry. 281 (44): 33395–402. doi:10.1074/jbc.m607111200. PMID 16954203.