Product Pathways - MAPK Signaling
MKK3b Antibody #9238
| Applications | Reactivity | Sensitivity | MW (kDa) | Source |
|---|---|---|---|---|
| W IP | H M R | Endogenous | 40 | Rabbit |
Applications Key:
W=Western Blotting
IP=Immunoprecipitation
Reactivity Key:
H=Human
M=Mouse
R=Rat
Species cross-reactivity is determined by Western blot.
Specificity / Sensitivity
MKK3b Antibody detects endogenous levels of total MKK3b protein. This antibody does not cross-react with MEK1, MEK2, MKK4 or MKK6.
Source / Purification
Polyclonal antibodies are produced by immunizing rabbits with a synthetic peptide (KLH-coupled) derived from the N-terminal sequence of human MKK3. Antibodies are purified by protein A and peptide affinity chromatogrpahy.
Western Blotting
Western blot analysis of extracts from C6, NIH/3T3 and 293 cells, using MKK3b Antibody #9238.
Background
MKK3 and MKK6 are two closely related dual-specificity protein kinases that activate p38 MAP kinase (1-5). MKK3 and MKK6 both phosphorylate and activate p38 MAP kinase at its activation site Thr-Gly-Tyr but do not phosphorylate or activate Erk1/2 or SAPK/JNK. Phosphorylation of p38 MAP kinase dramatically stimulates its ability to phosphorylate protein substrates such as ATF-2 and Elk-1. MKK3 and MKK6 are both activated by different forms of cellular stress and inflammatory cytokines (4,5). Activation of MKK3 and MKK6 occurs through phosphorylation of serine and threonine residues at sites Ser189 and Thr193 for MKK3 (2) and Ser207 and Thr211 for MKK6 (4,5).
Three alternatively spliced transcript variants of MKK3 encoding distinct isoforms have been reported. Isoform B utilizes a different start codon compared to isoform C resulting in the production of a N-terminal segment of isoform B which is shorter and distinct from isoform C . MKK3b is the predominant form of MKK3 and strongly activates p38 MAP kinase (6)
- Derijard, B. et al. (1995) Science 267, 682-685.
- Raingeaud, J. et al. (1995) J. Biol. Chem. 270, 7420-7426.
- Sluss, H.K. et al. (1994) Mol. Cell. Biol. 14, 8376-8384.
- Raingeaud, J. et al. (1996) Mol. Cell. Biol. 16(3), 1247-1255.
- Han, J. et al. (1996) J. Biol. Chem. 271, 2886-2891.
- Han, J. et al. (1997) FEBS Letters 403(1) , 19-22.
Application References
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Companion Products
- 9230 PhosphoPlus® MKK3/MKK6 (Ser189/207) Antibody Kit
- 9231 Phospho-MKK3/MKK6 (Ser189/207) Antibody
- 9232 MKK3 Antibody
- 7074 Anti-rabbit IgG, HRP-linked Antibody
- 7727 Biotinylated Protein Ladder Detection Pack
- 7003 20X LumiGLO® Reagent and 20X Peroxide
- 7071 Phototope®-HRP Western Blot Detection System, Anti-rabbit IgG, HRP-linked Antibody
This product is for in vitro research use only and is not intended for use in humans or animals. This product is not intended for use as therapeutic or in diagnostic procedures.
