Biology:NAD+ synthase (glutamine-hydrolysing)
From HandWiki
| NAD+ synthase (glutamine-hydrolyzing) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
 Glutamine-dependent NAD+ synthetase homooctamer, Human | |||||||||
| Identifiers | |||||||||
| EC number | 6.3.5.1 | ||||||||
| CAS number | 37318-70-0 | ||||||||
| 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, a NAD+ synthase (glutamine-hydrolysing) (EC 6.3.5.1) is an enzyme that catalyzes the chemical reaction
- ATP + deamido-NAD+ + L-glutamine + H2O [math]\displaystyle{ \rightleftharpoons }[/math] 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.
Nomenclature
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).
References
- ↑ "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. August 2003. doi:10.1074/jbc.m302257200. PMID 12771147.
- ↑ "Glutamine-dependent NAD+ synthetase. How a two-domain, three-substrate enzyme avoids waste". The Journal of Biological Chemistry 281 (44): 33395–402. November 2006. doi:10.1074/jbc.m607111200. PMID 16954203.
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