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The enzyme is recruited into a ternary complex containing the NAD -dependent deacetylase Sir T1.
NMNAT1 expression stimulates the deacetylase function of Sir T1 to deacetylate p53.
bifunctional enzyme, that also shows nicotinate-nucleotide adenylyltransferase activity, EC 126.96.36.199.
The enzyme reversibly catalyzes two closely related reactions: the biosyntheses of NAD and its nicotinic acid analogue (Na AD ) from their respective mononucleotide precursors and ATP bifunctional enzyme, that also shows nicotinate-nucleotide adenylyltransferase activity, EC 188.8.131.52.
NMAT is a stress response protein required for thermotolerance and mitigation of oxidative stress-induced shortened lifespan the enzyme is essential for the maintenance of NAD homeostasis enabling sustainable stomatal movement.
It is upregulated in the brain upon overexpression of poly-glutamine expanded protein and recruited with the chaperone Hsp70 into protein aggregates.Enzyme NMNAT-2 plays an important role in p53-mediated cell death upon DNA damage nicotinamide mononucleotide adenylyltransferase (NMNAT1) regulates ribosomal RNA transcription and plays a role in preventing cell death after damage.It interacts with the nucleolar repressor protein nucleomethylin.absisic acid-induced oxidative stress causes stomatal cell death in a nicotinamide mononucleotide adenyltransferase mutant.Stomata partially lose their ability to close leading to drought susceptibility and the stomata are less responsive to opening cues nicotinamide mononucleotide adenylyltransferase 2 (Nmat2) homozygous deletion mutants show an approximate 60% reduction of spinal motoneurons in the lumbar region and a more than 80% reduction in the sensory neurons of the dorsal root ganglion.