– Catalyzes the deamidation of nicotinamide, an early step in the NAD(+) salvage pathway. Positively regulates SIR2-mediated silencing and longevity by preventing the accumulation of intracellular nicotinamide, an inhibitor of SIR2, during times of stress. Acts also on nicotinyl hydroxamate. Nicotinamidase/PNC1 Protein, S. cerevisiae, Recombinant is expressed in E. coli expression system. The predicted molecular weight is 25.0 kDa and the accession number is P53184.