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Background:SIRT1 ( Sirtuin 1 , SIR2L1 ) is a member of the Sirtuin family of proteins related to the yeast Sir2 protein. Like Sir2 and other Sirtuins, SIRT1 is an NAD-dependent histone and protein deacetylase. SIRT1 catalyzes the removal of acetyl groups from a variety of protein substrates ( NBS1 , p53 , Ku70, etc. ) as well as from Histone H4 Lys16 . SIRT1 is involved in the regulation of a number of cellular processes, including transcription, metabolism, DNA repair and aging, and increased SIRT1 is associated with extended lifespan of C. elegans .






