Cell Signaling Technology

Product Pathways - MAPK Signaling

Phospho-RSK3 (Thr356/Ser360) Antibody #9348

Applications Reactivity Sensitivity MW (kDa) Source
W IP H M R Mk Endogenous 90 Rabbit

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.

Specificity / Sensitivity

Phospho-RSK3 (Thr356/Ser360) Antibody detects endogenous levels of RSK3 only when phosphorylated at threonine 356 and serine 360. The antibody does not recognize RSK3 phosphorylated at other sites. It shows some cross-reactivity with RSK1 and RSK2 when phosphorylated at the homologous sites.

Source / Purification

Polyclonal antibodies are produced by immunizing rabbits with a synthetic phospho-peptide (KLH-coupled) corresponding to residues surrounding Thr356/Ser360 of human RSK3. Antibodies are purified by protein A and peptide affinity chromatography.

Western Blotting

Western Blotting

Western blot analysis of extracts from HeLa and NIH/3T3 cells, untreated or TPA-treated, using Phospho-RSK3 (Thr356/Ser360) Antibody.

Background

The 90 kDa ribosomal S6 kinases (RSK1?4) are a family of widely expressed serine/threonine kinases characterized by two nonidentical, functional kinase domains (1) and a C-terminal docking site for extracellular signal-regulated kinases (ERKs) (2). Several sites both within and outside of the RSK kinase domain, including Ser380, Thr359, Ser363 and Thr573, are important for kinase activation (3). RSK1-3 are activated via coordinated phosphorylation by MAPKs, by autophosphorylation, and by phosphoinositide-3-OH kinase (PI3K) in response to many growth factors, polypeptide hormones and neurotransmitters (3).

  1. Fisher, T.L. and Blenis, J. (1996) Mol Cell Biol 16, 1212-9.
  2. Smith, J.A. et al. (1999) J Biol Chem 274, 2893-8.
  3. Dalby, K.N. et al. (1998) J Biol Chem 273, 1496-505.

Application References

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Companion Products

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.

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