Cell Signaling Technology
XP Monoclonal Antibody

Product Pathways - PI3K / Akt Signaling

Tuberin/TSC2 (D93F12) XP® Rabbit mAb #4308

Applications Reactivity Sensitivity MW (kDa) Isotype
W IP IF-IC H M R Hm Mk Endogenous 200 Rabbit IgG

Applications Key:  W=Western Blotting  IP=Immunoprecipitation  IF-IC=Immunofluorescence (Immunocytochemistry)
Reactivity Key:  H=Human  M=Mouse  R=Rat  Hm=Hamster  Mk=Monkey
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

* Product-specific protocol.

Specificity / Sensitivity

Tuberin/TSC2 (D93F12) XP® Rabbit mAb detects endogenous levels of total tuberin protein.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to carboxy-terminal residues of human tuberin protein.

Western Blotting

Western Blotting

Western blot analysis of extracts from wild-type (wt) and TSC2-deficient (-/-) mouse embryonic fibroblasts (MEF) using Tuberin/TSC2 (D93F12) XP® Rabbit mAb (upper) and Akt (pan) (C67E7) Rabbit mAb #4691 (lower).

Western Blotting

Western Blotting

Western blot analysis of extracts from SH-SY5Y cells and rat brain using Tuberin/TSC2 (D93F12) XP® Rabbit mAb.

IF-IC

IF-IC

Confocal immunofluorescent analysis of SH-SY5Y (left), wild-type MEF (middle) and TSC2-deficient (-/-) MEF cells (right) using Tuberin/TSC2 (D93F12) XP® Rabbit mAb (green). Actin filaments were labeled with DY-554 phalloidin (red). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).


Background

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).

  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. Manning, B. D. et al. (2002) Mol. Cell 10, 151-161.
  4. Aicher, L. D. et al. (2001) J. Biol. Chem. 276, 21017-21021.
  5. Dan, H. C. et al. (2002) J. Biol. Chem. 277, 35364-35370.
  6. Goncharova, E.A. et al. (2002) J. Biol. Chem. 277, 30958-30967.
  7. Inoki, K. et al. (2002) Nat. Cell Biol. 4, 648-657.

Application References

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Companion Products

For Research Use Only. Not For Use In Diagnostic Procedures.

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