Cell Signaling Technology

Product Pathways - MAPK Signaling

MAPKAPK-2 Antibody #3042

Applications Reactivity MW (kDa) Source
W H M R Mk (Hm) 47, 49 (Phosphorylated). Rabbit

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

Specificity / Sensitivity

MAPKAPK-2 Antibody detects endogenous levels of total MAPKAPK-2 protein. This antibody does not cross-react with MAPKAPK-3 or -5.

Source / Purification

Polyclonal antibodies are produced by immunizing rabbits with a synthetic peptide (KLH-coupled) corresponding to the carboxy-terminal region of human MAPKAPK-2. Antibodies are purified by protein A and peptide affinity chromatography.

Western Blotting

Western Blotting

Western blot analysis of extracts from untreated or UV treated HeLa and Cos cells using MAPKAPK-2 antibody.

Background

In response to cytokines, stress and chemotactic factors, MAP kinase-activated protein kinase 2 (MAPKAPK-2) is rapidly phosphorylated and activated. It has been shown that MAPKAPK-2 is a direct target of p38 MAPK (1). Multiple residues of MAPKAPK-2 are phosphorylated in vivo in response to stress. However, only four residues (Thr25, Thr222, Ser272 and Thr334) are phosphorylated by p38 MAPK in an in vitro kinase assay (2). Phosphorylation at Thr222, Ser272 and Thr334 appears to be essential for the activity of MAPKAPK-2 (2). Thr25 is phosphorylated by p42 MAPK in vitro, but is not required for the activation of MAPKAPK-2 (2).

  1. Rouse, J. et al. (1994) Cell 78, 1027-1037.
  2. Ben-Levy, R. et al. (1995) EMBO J. 14, 5920-5930.

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