Cell Signaling Technology

Product Pathways - PI3K / Akt Signaling

PI3 Kinase p101 (D32A5) Rabbit mAb #5569

Applications Reactivity Sensitivity MW (kDa) Isotype
W H M (R) Endogenous 101 Rabbit IgG

Applications Key:  W=Western Blotting
Reactivity Key:  H=Human  M=Mouse  R=Rat
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

Specificity / Sensitivity

PI3 Kinase p101 (D32A5) Rabbit mAb recognizes endogenous levels of total PI3 Kinase p101 protein. This antibody also detects a strong background band of unknown origin between 50-60 kDa.

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Gly508 of human PI3 Kinase p101 protein.

Western Blotting

Western Blotting

Western blot analysis of extracts from Raw 264.7 and Jurkat cells using PI3 Kinase p101 (D32A5) Rabbit mAb.

Background

Phosphoinositide 3-kinase (PI3K) catalyzes the production of phosphatidylinositol-3,4,5-triphosphate by phosphorylating phosphatidylinositol (PI), phosphatidylinositol-4-phosphate (PIP), and phosphatidylinositol-4,5-bisphosphate (PIP2). Growth factors and hormones trigger this phosphorylation event, which in turn coordinates cell growth, cell cycle entry, cell migration, and cell survival (1). PTEN reverses this process, and research studies have shown that the PI3K signaling pathway is constitutively activated in human cancers that have loss of function of PTEN (2). PI3Ks are composed of a catalytic subunit (p110) and a regulatory subunit. Various isoforms of the catalytic subunit (p110α, p110β, p110γ, and p110δ) have been isolated, and the regulatory subunits that associate with p110α, p110β, and p110δ are p85α and p85β (3). In contrast, p110γ associates with a p101 regulatory subunit that is unrelated to p85. Furthermore, p110γ is activated by βγ subunits of heterotrimeric G proteins (4).

The p101 regulatory subunit binds to Gβγ, released from heterotrimeric G proteins, and recruits bound p110γ catalytic subunit to the plasma membrane, which is required for GPCR-induced PI3Kγ activity (5).

  1. Cantley, L.C. (2002) Science 296, 1655-7.
  2. Simpson, L. and Parsons, R. (2001) Exp Cell Res 264, 29-41.
  3. Neri, L.M. et al. (2002) Biochim Biophys Acta 1584, 73-80.
  4. Stoyanov, B. et al. (1995) Science 269, 690-3.
  5. Voigt, P. et al. (2005) J Biol Chem 280, 5121-7.

Application References

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Companion Products

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

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