SIRT1, the human homolog of the S. cerevisiae Sir2 protein, functions as an NAD-dependent deacetylase of a number of nonhistone substrates including p53. In response to DNA damage, SIRT1 binds and deacetylates the p53 protein at c-terminal Lys382 residue and attenuate p53-mediated functions. When overexpressed in mouse embryo fibroblasts, SIRT1 antagonizes PML-induced acetylation of p53 and rescues PML-mediated premature cellular senescence. In mammalian cells, SIRT1 appears to control the cellular response to stress by regulating the FOXO family of forkhead transcription factors.
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Protein Aliases: 75SirT1; hSIR2; hSIRT1; NAD-dependent deacetylase sirtuin-1; NAD-dependent protein deacetylase sirtuin-1; Regulatory protein SIR2 homolog 1; RP11-57G10.3; sir2-like 1; SIR2-like protein 1; SIR2L1; SirtT1 75 kDa fragment; sirtuin type 1
Gene Aliases: SIR2; SIR2alpha; SIR2L1; SIRT1
UniProt ID: (Human) Q96EB6
Entrez Gene ID: (Human) 23411