Phospho-MEK1 (Thr286) Antibody #9127
Filter:
- WB
- IP
- IF
- F
Western blot analysis of extracts from A431, COS and PC12 cells, untreated or nocodazole-treated, using Phospho-MEK1 (Thr286) Antibody (upper) or MEK1 Antibody #9124 (lower).
Supporting Data
| REACTIVITY | H R Mk |
| SENSITIVITY | Endogenous |
| MW (kDa) | 45 |
| SOURCE | Rabbit |
Application Key:
- WB-Western Blotting
- IP-Immunoprecipitation
- IF-Immunofluorescence
- F-Flow Cytometry
Species Cross-Reactivity Key:
- H-Human
- R-Rat
- Mk-Monkey
- Related Products
Product Information
Product Usage Information
| Application | Dilution |
|---|---|
| Western Blotting | 1:1000 |
| Immunoprecipitation | 1:50 |
| Immunofluorescence (Immunocytochemistry) | 1:100 |
| Flow Cytometry (Fixed/Permeabilized) | 1:50 |
Storage
Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at –20°C. Do not aliquot the antibody.
Protocol
Specificity / Sensitivity
Phospho-MEK1 (Thr286) Antibody detects endogenous levels of MEK1 phosphorylated at threonine 286. This antibody does not cross-react with phosphorylated MEK2.
Species Reactivity:
Human, Rat, Monkey
The antigen sequence used to produce this antibody shares 100% sequence homology with the species listed here, but reactivity has not been tested or confirmed to work by CST. Use of this product with these species is not covered under our Product Performance Guarantee.
Species predicted to react based on 100% sequence homology:
Mouse
Source / Purification
Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Thr286 of human MEK1. Antibodies are purified by protein A and peptide affinity chromatography.
Background
MEK1 and MEK2, also called MAPK or Erk kinases, are dual-specificity protein kinases that function in a mitogen activated protein kinase cascade controlling cell growth and differentiation (1-3). Activation of MEK1 and MEK2 occurs through phosphorylation of two serine residues at positions 217 and 221, located in the activation loop of subdomain VIII, by Raf-like molecules. MEK1/2 is activated by a wide variety of growth factors and cytokines and also by membrane depolarization and calcium influx (1-4). Constitutively active forms of MEK1/2 are sufficient for the transformation of NIH/3T3 cells or the differentiation of PC-12 cells (4). MEK activates p44 and p42 MAP kinase by phosphorylating both threonine and tyrosine residues at sites located within the activation loop of kinase subdomain VIII.
MEK1 is phosphorylated at Ser298 by PAK1, which facilitates signal transduction from Raf to MEK1 and Erk2 (5-7). MEK1 is also phosphorylated by cdk5 at Thr286 in mitotic cells, causing negative feedback of the p44/42 MAP kinase pathway (8).
MEK1 is phosphorylated at Ser298 by PAK1, which facilitates signal transduction from Raf to MEK1 and Erk2 (5-7). MEK1 is also phosphorylated by cdk5 at Thr286 in mitotic cells, causing negative feedback of the p44/42 MAP kinase pathway (8).
- Crews, C.M. et al. (1992) Science 258, 478-480.
- Alessi, D.R. et al. (1994) EMBO J. 13, 1610-19.
- Rosen, L.B. et al. (1994) Neuron 12, 1207-21.
- Cowley, S. et al. (1994) Cell 77, 841-52.
- Xu, B. et al. (1999) J. Biol. Chem. 274, 34029-34035.
- Coles, L.C. and Shaw, P.E. (2002) Oncogene 21, 2236-2244.
- Eblen, S. T. et al. (2002) Mol. Cell. Biol. 22, 6023-6033.
- Sharma, P. et al. (2002) J. Biol. Chem. 277, 528-534.
Pathways
Explore pathways related to this product.
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