• Species Reactivity

  Human

• Specificity

  Detects human Sirtuin 1/SIRT1 in ELISAs. In direct ELISAs, no cross-reactivity with recombinant human Sirtuin 2, 3, 5, or 6 is observed.

• Source

  Monoclonal Mouse IgG1 Clone # 834918

• Immunogen

  E. coli-derived recombinant human Sirtuin 1/SIRT1    
  Met1-Ser747    
  Accession # Q96EB6

• Formulation

  Supplied 0.2 mg/mL in a saline solution containing BSA and Sodium Azide.

• Label

  Alexa Fluor 750

Applications

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  Recommended    
  Concentration

  Sample

• Intracellular Staining by Flow Cytometry

  0.25-1 μg/10    ⁶ cells

  HepG2 human hepatocellular carcinoma cell line were fixed and permeabilized with FlowX FoxP3 Fixation & Permeabilization Buffer Kit (Catalog # )

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Please Note: Optimal dilutions should be determined by each laboratory for each application.  are available in the Technical Information section on our website.

Preparation and Storage

• Stability & Storage

  Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: Sirtuin 1/SIRT1

SIRT1 (SIR2-like protein 1; also NAD-dependent protein deacetylase sirtuin-1 and hSIR2) is a class I member of the sirtuin family of enzymes. Although its predicted MW is 81 kDa, it runs anomalously at 110-120 kDa in SDS-PAGE. It is a widely expressed nuclear protein that participates in the deacetylation of multiple proteins, including p300, p53, LKB1 and histone H1. Functionally, this has the effect of promoting heterochromatin formation, cell survival and resistance to oxidative stress. Metabolically, SIRT1 induces insulin secretion, inhibits glycolysis and suppresses fatty acid synthesis. Human SIRT1 is 747 amino acids (aa) in length. It possesses two NLSs (aa 32-39 and 223-230), an NES (aa 138-145), and a sirtuin-type deacetylase domain (aa 241-495) that contains an NAD and Zn binding motif. There are at least 12 utilized Ser/Thr phosphorylation sites, plus two nitrosylated Cys and one acetylated Ala. There are also four potential isoform variants. One is 95 kDa in size and shows a deletion of aa 454-639, a second is 17 kDa in size and contains a 16 aa substitution for aa 149-747, and a third contains an alternative start site at Met296. SIRT1 is also known to undergo proteolysis by cathepsin B at Val533Ser534, generating a fourth, C-terminally truncated 75 kDa isoform. Full-length SIRT1 is suggested to form trimers, while the 17 kDa isoform appears to form dimers. Over aa 2-747, human and mouse SIRT1 share 86% aa sequence identity.

• Long Name:

  Silent Mating Type Information Regulation 2 Homolog

• Entrez Gene IDs:

  23411 (Human); 93759 (Mouse); 309757 (Rat)

• Alternate Names:

  EC 3.5.1; S. cerevisiae, homolog) 1; SIR2alpha; SIR2L1; SIR2-like protein 1; SIRT1; Sirtuin 1