Cell Signaling Technology

Product Pathways - Akt Signaling

PTEN (138G6) Rabbit mAb #9559

Applications Reactivity MW (kDa) Source Isotype
W IP IHC-P IF-IC F H M R Mk 54 Rabbit IgG

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

Specificity / Sensitivity

PTEN (138G6) Rabbit mAb detects endogenous levels of total PTEN protein.

Source / Purification

Monoclonal antibody is produced by immunizing rabbits with a synthetic peptide (KLH-coupled) derived from the carboxy-terminal sequence of human PTEN.

Western Blotting

Western Blotting

Western blot analysis of extracts from A431, HeLa, 293, COS, PC12, NIH/3T3 and Mouse Brain cells, using PTEN (138G6) Rabbit mAb.

IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded MDA-MB-468 xenograft, using Phospho-Akt (Ser473) (736E11) Rabbit mAb (IHC Preferred) (#3787) (left) or PTEN (138G6) Rabbit mAb (right). MDA-MB-468 cells lack PTEN. Note the lack of PTEN staining in the Phospho-Akt positive cells.

IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded human lung carcinoma (left) and prostate carcinoma (right), using PTEN (138G6) Rabbit mAb. Note the stromal cell staining in the PTEN negative lung carcinoma, and the cancer cell staining in the PTEN positive prostate carcinoma.


IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded human colon carcinoma, using PTEN (138G6) Rabbit mAb in the presence of control peptide (left) or PTEN Blocking Peptide #1250 (right).

IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded cell pellets demonstrating the specificity of PTEN (138G6) Rabbit mAb: DU145, HT-29 and MCF-7 (PTEN positive) and Jurkat, MDA-MB-468 and LNCaP (PTEN negative).

IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded xenografts using PTEN (138G6) Rabbit mAb. DU145 (left) and A549 (middle) are PTEN positive cell lines, while U-87MG (right) is PTEN negative.


IHC-P (paraffin)

IHC-P (paraffin)

Immunohistochemical analysis of paraffin-embedded MDA-MB-468 xenograft using Phospho-Akt (Ser473) (D9E) Rabbit mAb #4060 (left) or PTEN (138G6) Rabbit mAb (right). Note the presence of P-Akt staining in the PTEN deficient MDA-MB-468 cells.

Flow Cytometry

Flow Cytometry

Flow cytometric analysis of C6 cells, using PTEN (138G6) Rabbit mAb (blue) compared to a nonspecific negative control antibody (red).

IF-IC

IF-IC

Confocal immunofluorescent images of PTEN-positive (NIH/3T3) and -negative (LNCaP) cell lines labeled with PTEN (138G6) Rabbit mAb (green, top) and Phospho-Akt (Ser473) (193H12) Rabbit mAb #4058 (green, bottom). Red = Actin filaments (phalloidin). Blue pseudocolor = DRAQ5™ (fluorescent DNA dye).


Background

PTEN (phosphatase and tensin homologue deleted on chromosome ten), also referred to as MMAC (mutated in multiple advanced cancers) phosphatase, is a tumor suppressor implicated in a wide variety of human cancers (1). PTEN encodes a 403 amino acid polypeptide originally described as a dual-specificity protein phosphatase (2). The main substrates of PTEN are inositol phospholipids generated by the activation of the phosphoinositide 3-kinase (PI3K) (3). PTEN is a major negative regulator of the PI3K/Akt signaling pathway (1,4,5). PTEN possesses a carboxy-terminal, noncatalytic regulatory domain with three phosphorylation sites (Ser380, Thr382 and Thr383) that regulate PTEN stability and may affect its biological activity (6,7). PTEN regulates p53 protein level and activity (8) and is involved in G protein coupled signaling during chemotaxis (9,10).

  1. Cantley, L.C. and Neel, B.G. (1999) Proc. Natl. Acad. Sci. USA 96, 4240-4245.
  2. Myers, M.P. et al. (1997) Proc. Natl. Acad. Sci. USA 94, 9052-9057.
  3. Myers, M.P. et al. (1998) Proc. Natl. Acad. Sci. USA 95, 13513-13518.
  4. Wan, X. and Helman, L.J. (2003) Oncogene 22, 8205-8211.
  5. Wu, X. et al. (1998) Proc. Natl. Acad. Sci. USA 95, 15587-15591.
  6. Vazquez, F. et al. (2000) Mol. Cell. Biol. 20, 5010-5018.
  7. Torres, J. and Pulido, R. (2001) J. Biol. Chem. 276, 993-998.
  8. Freeman, D.J. et al. (2003) Cancer Cell 3, 117-130.
  9. Funamoto, S. et al. (2002) Cell 109, 611-623.
  10. Iijima, M. and Devreotes, P. (2002) Cell 109, 599-610.

Application References

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Companion Products

Rabbit Monoclonals Produced Using Epitomics® Technology, U.S. Patent No. 5,675,063.

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