Revision 3
Cell Signaling Technology

Orders: 877-616-CELL (2355) [email protected]

Support: 877-678-TECH (8324)

Web: [email protected] cellsignal.com

3 Trask LaneDanversMassachusetts01923USA
For Research Use Only. Not for Use in Diagnostic Procedures.
Applications:

WB, IHC-P, IF-IC

REACTIVITY:

H M R Mk Mi

SENSITIVITY:

Endogenous

MW (kDa):

90

Source/Isotype:

Rabbit IgG

UniProt ID:

#P51812, #Q15349, #Q15418

Entrez-Gene Id:

6197, 6196, 6195

Product Information

Product Usage Information

Application Dilution
Western Blotting 1:1000
Immunohistochemistry (Paraffin) 1:300
Immunofluorescence (Immunocytochemistry) 1:800

Storage

Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

For a carrier free (BSA and azide free) version of this product see product #93317.

Specificity / Sensitivity

Phospho-p90RSK (Ser380) (D3H11) Rabbit mAb recognizes endogenous levels of p90RSK1 protein when phosphorylated at Ser380. This antibody also detects p90RSK2 phosphorylated at Ser386 and p90RSK3 phosphorylated at Ser377.

Species Reactivity:

Human, Mouse, Rat, Monkey, Mink

Species predicted to react based on 100% sequence homology

Chicken, Xenopus, Zebrafish, Bovine, Dog, Pig, Horse

Source / Purification

Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Ser377 of human p90RSK3 protein.

Background

The 90 kDa ribosomal S6 kinases (RSK1-4) are a family of widely expressed Ser/Thr kinases characterized by two nonidentical, functional kinase domains (1) and a carboxy-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, autophosphorylation, and phosphoinositide-3-OH kinase (PI3K) in response to many growth factors, polypeptide hormones, and neurotransmitters (3).

Upon mitogenic stimulation, p44/42 Erk1/2 and Erk5 MAP kinases cooperatively phosphorylate p90RSK at Thr573 (RSK1 numbering) located within the C-terminal kinase domain and at Thr359/Ser363 in the linker region between the two kinase domains (3). Phosphorylation at Thr573 within the activation loop of the p90RSK C-terminal kinase domain promotes activation and phosphorylation at Ser380 within the a hydrophobic stretch of the linker region (4,5). When phosphorylated, Ser380 acts as a docking site for the constitutively active Ser/Thr kinase PDK1, which in turn phosphorylates p90RSK at Ser221 within the N-terminal kinase domain activation loop, resulting in full enzymatic activation of p90RSK (6). Antibodies against these phosphorylation sites are useful for understanding the kinetics and regulation of p90RSK activation.For more information regarding the phospho-regulatory sites within each p90RSK isoform, including more information regarding the seminal studies demonstrating the complex phosphorylation cascades involved, please see the references herein and PhosphoSitePlus® (www.phosphosite.org).

  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.
  4. Roux, P.P. et al. (2003) Mol Cell Biol 23, 4796-804.
  5. Cargnello, M. and Roux, P.P. (2011) Microbiol Mol Biol Rev 75, 50-83.
  6. Romeo, Y. et al. (2012) Biochem J 441, 553-69.

Species Reactivity

Species reactivity is determined by testing in at least one approved application (e.g., western blot).

Western Blot Buffer

IMPORTANT: For western blots, incubate membrane with diluted primary antibody in 5% w/v BSA, 1X TBS, 0.1% Tween® 20 at 4°C with gentle shaking, overnight.

Applications Key

WB: Western Blotting IHC-P: Immunohistochemistry (Paraffin) IF-IC: Immunofluorescence (Immunocytochemistry)

Cross-Reactivity Key

H: human M: mouse R: rat Hm: hamster Mk: monkey Vir: virus Mi: mink C: chicken Dm: D. melanogaster X: Xenopus Z: zebrafish B: bovine Dg: dog Pg: pig Sc: S. cerevisiae Ce: C. elegans Hr: horse GP: Guinea Pig Rab: rabbit All: all species expected

Trademarks and Patents

Cell Signaling Technology is a trademark of Cell Signaling Technology, Inc.
All other trademarks are the property of their respective owners. Visit cellsignal.com/trademarks for more information.

使用に関する制限

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Revision 3
#11989

Phospho-p90RSK (Ser380) (D3H11) Rabbit mAb

Western Blotting Image 1: Phospho-p90RSK (Ser380) (D3H11) Rabbit mAb Expand Image
Western blot analysis of extracts from various cell lines, starved overnight and either untreated (-) or treated (+) with TPA #4174 (200 nM, 15 min), Human Epidermal Growth Factor (hEGF) #8916 (100 ng/mL, 15 min), or Human Platelet-Derived Growth Factor BB (hPDGF-BB) #8912 (100 ng/mL, 15 min) as indicated, using Phospho-p90RSK (Ser380) (D3H11) Rabbit mAb.
Immunohistochemistry Image 1: Phospho-p90RSK (Ser380) (D3H11) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human colon carcinoma, control (left) or λ phosphatase-treated (right), using Phospho-p90RSK (Ser380) (D3H11) Rabbit mAb.
Immunohistochemistry Image 2: Phospho-p90RSK (Ser380) (D3H11) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded human ovarian carcinoma using Phospho-p90RSK (Ser380) (D3H11) Rabbit mAb.
Immunohistochemistry Image 3: Phospho-p90RSK (Ser380) (D3H11) Rabbit mAb Expand Image
Immunohistochemical analysis of paraffin-embedded HeLa cell pellets, untreated (left) or treated with TPA #4174 (right), using Phospho-p90RSK (Ser380) (D3H11) Rabbit mAb.
Immunofluorescence Image 1: Phospho-p90RSK (Ser380) (D3H11) Rabbit mAb Expand Image
Confocal immunofluorescent analysis of NIH/3T3 cells, serum-starved (left), treated with TPA #4174 (200 nM, 15 min; center), or treated with TPA followed by λ phosphatase (right), using Phospho-p90RSK (Ser380) (D3H11) Rabbit mAb (green). Actin filaments were labeled with DY-554 phalloidin (red). Blue pseudocolor = DRAQ5® #4084 (fluorescent DNA dye).