Cell Signaling Technology

Product Pathways - MAPK Signaling

p38α MAP Kinase (5F11) Mouse mAb #9217

Applications Reactivity MW (kDa) Source Isotype
W F H M R 43 Mouse IgG2b

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

Specificity / Sensitivity

p38α MAP Kinase (5F11) Mouse mAb detects endogenous levels of p38α MAP kinase. This antibody does not cross-react with either JNK/SAPK or p42/44 MAP kinase or other isoforms of p38.

Source / Purification

Monoclonal antibody is produced by immunizing mice with an MBP-p38 MAP kinase recombinant protein.

Western Blotting

Western Blotting

Western blot analysis of extracts from HeLa, NIH/3T3 and C6 cells, using p38α MAP Kinase (5F11) Mouse mAb.

Flow Cytometry

Flow Cytometry

Flow cytometric analysis of Jurkat cells, using p38α MAP Kinase (5F11) Mouse mAb (blue) compared to a nonspecific negative control antibody (red).

Background

p38 MAP kinase (MAPK), also called RK (1) or CSBP (2), is the mammalian orthologue of the yeast HOG kinase which participates in a signaling cascade controlling cellular responses to cytokines and stress (1-4). Four isoforms of p38 MAP kinase, p38α, β, γ (also known as ERK6 or SAPK3) and δ (also known as SAPK4) have been identified. Similar to the SAPK/JNK pathway, p38 MAP kinase is activated by a variety of cellular stresses including osmotic shock, inflammatory cytokines, lipopolysaccharides (LPS), UV light and growth factors (1-5). MKK3, MKK6 and SEK activate p38 MAP kinase by phosphorylation at Thr180 and Tyr182. Activated p38 MAP kinase has been shown to phosphorylate and activate MAPKAP kinase 2 (3) and to phosphorylate the transcription factors ATF-2 (5), Max (6) and MEF2 (5-8).

  1. Rouse, J. et al. (1994) Cell 78, 1027-1037.
  2. Han, J. et al. (1994) Science 265, 808-811.
  3. Lee, J.C. et al. (1994) Nature 372, 739-746.
  4. Freshney, N.W. et al. (1994) Cell 78, 1039-1049.
  5. Raingeaud, J. et al. (1995) J. Biol. Chem. 270, 7420-7426.
  6. Zervos, A.S. et al. (1995) Proc. Natl. Acad. Sci. USA 92, 10531-10534.
  7. Zhao, M. et al. (1999) Mol. Cell. Biol. 19, 21-30.
  8. Yang, S.H. et al. (1999) Mol. Cell. Biol. 19, 4028-4038.

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