Cell Signaling Technology

Product Pathways - MAPK Signaling

Phospho-MKK3 (Ser189)/MKK6 (Ser207) (22A8) Rabbit mAb #9236

Applications Reactivity Sensitivity MW (kDa) Isotype
W IP H M R Mk Endogenous 40 P-MKK3, 41 P-MKK6 Rabbit IgG

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

Protocols

Specificity / Sensitivity

Phospho-MKK3/MKK6 (Ser189/207) (22A8) Rabbit mAb detects endogenous levels of MKK3/MKK6 only when phosphorylated at serine189/207. The antibody does not recognize the corresponding phosphorylated residues of MEK1, MEK2 or MKK4/SEK1. 

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser189/207 of human MKK3.

Western Blotting

Western Blotting

Western blot analysis of extracts from untreated or UV-treated COS, NIH/3T3 and C6 cells, using Phospho-MKK3/MKK6 (Ser189/207) (22A8) Rabbit mAb.

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).

  1. Derijard, B. et al. (1995) Science 267, 682-685.
  2. Raingeaud, J. et al. (1995) J. Biol. Chem. 270, 7420-7426.
  3. Sluss, H.K. et al. (1994) Mol. Cell. Biol. 14, 8376-8384.
  4. Raingeaud, J. et al. (1996) Mol. Cell. Biol. 16(3), 1247-1255.
  5. Han, J. et al. (1996) J. Biol. Chem. 271, 2886-2891.

Application References

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Companion Products

Rabbit Monoclonals Produced Using Epitomics® Technology, U.S. Patent No. 5,675,063.

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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