|Application ||WB, IHC|
|Calculated MW||43439 Da|
|Other Names||Dual specificity mitogen-activated protein kinase kinase 1, MAP kinase kinase 1, MAPKK 1, MKK1, ERK activator kinase 1, MAPK/ERK kinase 1, MEK 1, MAP2K1, MEK1, PRKMK1|
|Target/Specificity||A synthetic phospho-peptide corresponding to residues surrounding Ser218 and Ser222 of human MEK1 was used as immunogen. The antibody only detects MEK1 phosphorylated on Serine 218 and 222.|
|Format||50 mM Tris-Glycine (pH 7.4), 0.15 M NaCl, 40% Glycerol, 0.01% sodium azide and 0.05% BSA.|
|Storage||Maintain refrigerated at 2-8°C for up to 6 months. For long term storage store at -20°C in small aliquots to prevent freeze-thaw cycles.|
|Precautions||MEK1/MEK2 Antibody Phospho (pS218/222) is for research use only and not for use in diagnostic or therapeutic procedures.|
|Function||Dual specificity protein kinase which acts as an essential component of the MAP kinase signal transduction pathway. Binding of extracellular ligands such as growth factors, cytokines and hormones to their cell-surface receptors activates RAS and this initiates RAF1 activation. RAF1 then further activates the dual-specificity protein kinases MAP2K1/MEK1 and MAP2K2/MEK2. Both MAP2K1/MEK1 and MAP2K2/MEK2 function specifically in the MAPK/ERK cascade, and catalyze the concomitant phosphorylation of a threonine and a tyrosine residue in a Thr-Glu-Tyr sequence located in the extracellular signal-regulated kinases MAPK3/ERK1 and MAPK1/ERK2, leading to their activation and further transduction of the signal within the MAPK/ERK cascade. Depending on the cellular context, this pathway mediates diverse biological functions such as cell growth, adhesion, survival and differentiation, predominantly through the regulation of transcription, metabolism and cytoskeletal rearrangements. One target of the MAPK/ERK cascade is peroxisome proliferator- activated receptor gamma (PPARG), a nuclear receptor that promotes differentiation and apoptosis. MAP2K1/MEK1 has been shown to export PPARG from the nucleus. The MAPK/ERK cascade is also involved in the regulation of endosomal dynamics, including lysosome processing and endosome cycling through the perinuclear recycling compartment (PNRC), as well as in the fragmentation of the Golgi apparatus during mitosis.|
|Cellular Location||Cytoplasm, cytoskeleton, microtubule organizing center, centrosome Cytoplasm, cytoskeleton, microtubule organizing center, spindle pole body. Cytoplasm Nucleus. Membrane; Peripheral membrane protein. Note=Localizes at centrosomes during prometaphase, midzone during anaphase and midbody during telophase/cytokinesis (PubMed:14737111). Membrane localization is probably regulated by its interaction with KSR1 (PubMed:10409742)|
|Tissue Location||Widely expressed, with extremely low levels in brain.|
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Provided below are standard protocols that you may find useful for product applications.
MEK1 and MEK2 (MAPK kinase 1/2, or ERK kinase 1/2) are mitogen-activated protein kinases that stimulate MAP kinase activity, playing a role in both cell growth and differentiation (1,2). MEK itself is activated via phosphorylation at serines 217/218 and 221/222 by upstream activator kinases, including c-raf, mos and MEK kinase (3,4). MEK1 and MEK2 are activated by a wide variety of growth factors and cytokines, and also by membrane depolarization and calcium influx (5).
1. Crews, C. M., et al. The primary structure of MEK, a protein kinase that phosphorylates the ERK gene product. Science 258: 478
2. Zheng, C.F., and K.L. Guan. Cloning and characterization of two distinct human extracellular signal-regulated kinase activator kinases, MEK1 and MEK2. J Biol Chem. 268: 11435
3. Zheng, C.F., and K.L. Guan. Activation of MEK family kinases requires phosphorylation of two conserved Ser/Thr residues. EMBO J. 13: 1123
4. Alessi, D.R., et al. Identification of the sites in MAP kinase kinase-1 phosphorylated by p74raf-1. EMBO J. 13: 1610
5. Rosen, L.B., et al. Membrane depolarization and calcium influx stimulate MEK and MAP kinase via activation of Ras. Neuron 12: 1207
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