SIRT1 Antibodies

Target Information

an NAD-dependent protein deacetylase that links transcriptional regulation directly to intracellular energetics. Participates in the coordination of several separate cellular functions such as cell cycle, response to DNA damage, metabolism, apoptosis and autophagy. Can modulate chromatin function through deacetylation of histones and can promote alterations in the methylation of histones and DNA, leading to transcriptional repression. Deacetylates a broad range of transcription factors and coregulators, thereby regulating target gene expression positively and negatively. Serves as a sensor of the cytosolic ratio of NAD(+)/NADH which is altered by glucose deprivation and metabolic changes associated with caloric restriction. Essential in skeletal muscle cell differentiation and in response to low nutrients mediates the inhibitory effect on skeletal myoblast differentiation which also involves 5'-AMP-activated protein kinase (AMPK) and nicotinamide phosphoribosyltransferase (NAMPT). Component of the eNoSC (energy-dependent nucleolar silencing) complex, a complex that mediates silencing of rDNA in response to intracellular energy status and acts by recruiting histone-modifying enzymes. Elevation of NAD(+)/NADP(+) ratio activates SIRT1. Recruited to LRH1 target gene promoters by NR0B2/SHP thereby stimulating histone H3 and H4 deacetylation leading to transcriptional repression. Implicated in regulation of adipogenesis and fat mobilization in white adipocytes by repression of PPARG. Involved in liver and muscle metabolism. Is involved in autophagy, presumably by deacetylating ATG5, ATG7 and ATG8. Deacetylates AKT1 which leads to enhanced binding of AKT1 and PDK1 to PIP3 and promotes their activation. Widely expressed. Inhibited by nicotinamide. Belongs to the sirtuin family. Class I subfamily. 2 isoforms of the human protein are produced by alternative splicing. Note: This description may include information from UniProtKB.

Alternate Names

75SirT1; AA673258; hSIR2; hSIRT1; MGC150273; mSIR2a; NAD-dependent deacetylase sirtuin-1; NAD-dependent protein deacetylase sirtuin-1; NAD-dependent protein deacylase sirtuin-1; Regulatory protein SIR2 homolog 1; SIR1; SIR2; Sir2; sir2-like 1; SIR2-like protein 1; Sir2a; SIR2alpha; SIR2L1; Sir2l1; SIRT1; Sirt1; SirtT1 75 kDa fragment; sirtuin (silent mating type information regulation 2 homolog) 1 (S. cerevisiae); sirtuin 1; sirtuin 1 ((silent mating type information regulation 2, homolog) 1; sirtuin 1 (silent mating type information regulation 2, homolog) 1 (S. cerevisiae); sirtuin type 1