• Product name
  • Description
    Rabbit polyclonal to SIRT3
  • Host species
  • Tested applications
    Suitable for: ICC/IF, WBmore details
  • Species reactivity
    Reacts with: Human
  • Immunogen

    Synthetic peptide conjugated to KLH derived from within residues 350 to the C-terminus of Human SIRT3.

    Read Abcam's proprietary immunogen policy (Peptide available as ab45065.)

  • Positive control
    • ab40963 gave a positive signal in Human Liver Tissue Lysate.



Our Abpromise guarantee covers the use of ab40963 in the following tested applications.

The application notes include recommended starting dilutions; optimal dilutions/concentrations should be determined by the end user.

Application Abreviews Notes
ICC/IF Use a concentration of 10 µg/ml.
WB Use a concentration of 1 µg/ml. Detects a band of approximately 50 kDa (predicted molecular weight: 44 kDa).


  • Function
    NAD-dependent protein deacetylase. Activates or deactivates mitochondrial target proteins by deacetylating key lysine residues. Known targets include ACSS1, IDH, GDH, SOD2, PDHA1, LCAD, SDHA and the ATP synthase subunit ATP5O. Contributes to the regulation of the cellular energy metabolism. Important for regulating tissue-specific ATP levels.
  • Tissue specificity
    Widely expressed.
  • Sequence similarities
    Belongs to the sirtuin family. Class I subfamily.
    Contains 1 deacetylase sirtuin-type domain.
  • Post-translational
    Processed by mitochondrial processing peptidase (MPP) to give a 28 kDa product. Such processing is probably essential for its enzymatic activity.
  • Cellular localization
    Mitochondrion matrix.
  • Information by UniProt
  • Database links
  • Alternative names
    • hSIRT 3 antibody
    • hSIRT3 antibody
    • Mitochondrial nicotinamide adenine dinucleotide dependent deacetylase antibody
    • NAD dependent deacetylase sirtuin 3 mitochondrial antibody
    • NAD-dependent protein deacetylase sirtuin-3, mitochondrial antibody
    • Regulatory protein SIR2 homolog 3 antibody
    • Silent mating type information regulation 2 S.cerevisiae homolog 3 antibody
    • Sir 2 like 3 antibody
    • SIR 2 like protein 3 antibody
    • SIR 3 antibody
    • SIR2 L3 antibody
    • Sir2 like 3 antibody
    • SIR2 like protein 3 antibody
    • SIR2-like protein 3 antibody
    • SIR2L3 antibody
    • SIR3_HUMAN antibody
    • SIRT 3 antibody
    • SIRT3 antibody
    • Sirtuin 3 antibody
    • Sirtuin silent mating type information regulation 2 homolog 3 (S. cerevisiae) antibody
    • Sirtuin type 3 antibody
    • Sirtuin3 antibody
    see all


  • Anti-SIRT3 antibody (ab40963) at 1 µg/ml + Human liver tissue lysate - total protein (ab29889) at 10 µg

    IRDye 680 Conjugated Goat Anti-Rabbit IgG (H+L) at 1/10000 dilution

    Performed under reducing conditions.

    Predicted band size: 44 kDa
    Observed band size: 50 kDa
    why is the actual band size different from the predicted?
    Additional bands at: 32 kDa, 36 kDa. We are unsure as to the identity of these extra bands.

    The band observed at 32 kDa is thought to represent the 28 kDa processed form of SIRT3.

  • ICC/IF image of ab40963 stained MCF7 cells. The cells were 4% PFA fixed (10 min) and then incubated in 1%BSA / 10% normal goat serum / 0.3M glycine in 0.1% PBS-Tween for 1h to permeabilise the cells and block non-specific protein-protein interactions. The cells were then incubated with the antibody (ab40963, 10µg/ml) overnight at +4°C. The secondary antibody (green) was ab96899 Dylight 488 goat anti-rabbit IgG (H+L) used at a 1/250 dilution for 1h. Alexa Fluor® 594 WGA was used to label plasma membranes (red) at a 1/200 dilution for 1h. DAPI was used to stain the cell nuclei (blue) at a concentration of 1.43µM.


ab40963 has not yet been referenced specifically in any publications.

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