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Western blot analysis of extracts from HeLa cells, transfected with non-targeted (-) or SignalSilence® Tuberin/TSC2 siRNA I (+) using a tuberin/TSC2 antibody and α-Tubulin (11H10) Rabbit mAb #2125. The tuberin/TSC2 antibody confirms silencing of tuberin/TSC2 expression, while the α-Tubulin antibody is used as a loading control.

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Product Usage Information

CST recommends transfection with 100 nM Tuberin/TSC2 siRNA I 48 hours prior to cell lysis. For transfection procedure, follow protocol provided by the transfection reagent manufacturer. Please feel free to contact CST with any questions on use.


Storage: SignalSilence® siRNA is supplied in RNAse-free water. Aliquot and store at -20ºC.

Product Description

SignalSilence® Tuberin/TSC2 siRNA from Cell Signaling Technology (CST) allows the researcher to specifically inhibit tuberin/TSC2 expression using RNA interference, a method whereby gene expression can be selectively silenced through the delivery of double stranded RNA molecules into the cell. All SignalSilence® siRNA products from CST are rigorously tested in-house and have been shown to reduce target protein expression by western analysis.


Tuberin is a product of the TSC2 tumor suppressor gene and an important regulator of cell proliferation and tumor development (1). Mutations in either TSC2 or the related TSC1 (hamartin) gene cause tuberous sclerosis complex (TSC), an autosomal dominant disorder characterized by development of multiple, widespread non-malignant tumors (2). Tuberin is directly phosphorylated at Thr1462 by Akt/PKB (3). Phosphorylation at Thr1462 and Tyr1571 regulates tuberin-hamartin complexes and tuberin activity (3-5). In addition, tuberin inhibits the mammalian target of rapamycin (mTOR), which promotes inhibition of p70 S6 kinase, activation of eukaryotic initiation factor 4E binding protein 1 (4E-BP1, an inhibitor of translation initiation), and eventual inhibition of translation (3,6,7).


Small interfering RNA (siRNA) has been used to specifically silence tuberin in HEK293 cells (7).


1.  Soucek, T. et al. (1998) Proc. Natl. Acad. Sci. USA 95, 15653-15658.

2.  Sparagana, S.P. and Roach, E.S. (2000) Curr. Opin. Neurol. 13, 115-119.

3.  Aicher, L. D. et al. (2001) J. Biol. Chem. 276, 21017-21021.

4.  Dan, H. C. et al. (2002) J. Biol. Chem. 277, 35364-35370.

5.  Goncharova, E.A. et al. (2002) J. Biol. Chem. 277, 30958-30967.

6.  Inoki, K. et al. (2002) Nat Cell Biol 4, 648-57.

7.  Manning, B.D. et al. (2002) Mol Cell 10, 151-62.


Entrez-Gene Id 7249
Swiss-Prot Acc. P49815


For Research Use Only. Not For Use In Diagnostic Procedures.
Cell Signaling Technology® is a trademark of Cell Signaling Technology, Inc.
SignalSilence® is a trademark of Cell Signaling Technology, Inc.
Limited Use Label License, RNA interference: This product is licensed under European Patent 1144623 and foreign equivalents from Ribopharma AG, Kulmbach, Germany and is provided only for use in non-commercial research specifically excluding use (a) in drug discovery or drug development, including target identification or target validation, by or on behalf of a commercial entity, (b) for contract research or commercial screening services, (c) for the production or manufacture of siRNA-related products for sale, or (d) for the generation of commercial databases for sale to Third Parties. Information about licenses for these and other commercial uses is available from Ribopharma AG, Fritz-Hornschuch-Str. 9, D-95326 Kulmbach, Germany.