Product Pathways - MAPK Signaling
p44/42 MAPK (Erk1/2) Control Cell Extracts #9194
|9194S||150 µl (10 western blots)||---||In Stock||---|
p44/42 MAPK (Erk1/2) Negative Control Cell Extracts: Total cell extracts from Jurkat cells treated with U0126 (MEK1/2 Inhibitor) #9903 at 10 μM for 1 hour, to serve as a negative control. Supplied in SDS Sample Buffer.
p44/42 MAPK (Erk1/2) Positive Control Cell Extracts: Total cell extracts from Jurkat cells treated with TPA #4174 at 200 nM for 20 minutes, to serve as a positive control. Supplied in SDS Sample Buffer.
Western blot analysis of p44/42 MAPK (Erk1/2) Control Cell Extracts, treated with either U0126 or TPA, using Phospho-p44/42 MAPK (Erk1/2) (Thr202/Tyr204) Antibody #9101 (left) or p44/42 MAPK (Erk1/2) Antibody #9102 (right).
Western Blots: As controls, CST recommends using 15 μl of U0126- and TPA-treated p44/42 MAPK (Erk1/2) Cell Extracts. Boil for 3-5 minutes before use.
Mitogen-activated protein kinases (MAPKs) are a widely conserved family of serine/threonine protein kinases involved in many cellular programs, such as cell proliferation, differentiation, motility, and death. The p44/42 MAPK (Erk1/2) signaling pathway can be activated in response to a diverse range of extracellular stimuli including mitogens, growth factors, and cytokines (1-3), and research investigators consider it an important target in the diagnosis and treatment of cancer (4). Upon stimulation, a sequential three-part protein kinase cascade is initiated, consisting of a MAP kinase kinase kinase (MAPKKK or MAP3K), a MAP kinase kinase (MAPKK or MAP2K), and a MAP kinase (MAPK). Multiple p44/42 MAP3Ks have been identified, including members of the Raf family, as well as Mos and Tpl2/COT. MEK1 and MEK2 are the primary MAPKKs in this pathway (5,6). MEK1 and MEK2 activate p44 and p42 through phosphorylation of activation loop residues Thr202/Tyr204 and Thr185/Tyr187, respectively. Several downstream targets of p44/42 have been identified, including p90RSK (7) and the transcription factor Elk-1 (8,9). p44/42 are negatively regulated by a family of dual-specificity (Thr/Tyr) MAPK phosphatases, known as DUSPs or MKPs (10), along with MEK inhibitors, such as U0126 and PD98059.
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- Baccarini, M. (2005) FEBS Lett 579, 3271-7.
- Meloche, S. and Pouysségur, J. (2007) Oncogene 26, 3227-39.
- Roberts, P.J. and Der, C.J. (2007) Oncogene 26, 3291-310.
- Rubinfeld, H. and Seger, R. (2005) Mol Biotechnol 31, 151-74.
- Murphy, L.O. and Blenis, J. (2006) Trends Biochem Sci 31, 268-75.
- Dalby, K.N. et al. (1998) J Biol Chem 273, 1496-505.
- Marais, R. et al. (1993) Cell 73, 381-93.
- Kortenjann, M. et al. (1994) Mol Cell Biol 14, 4815-24.
- Owens, D.M. and Keyse, S.M. (2007) Oncogene 26, 3203-13.
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This product is intended for research purposes only. The product is not intended to be used for therapeutic or diagnostic purposes in humans or animals.
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