Product Pathways - Translational Control
Phospho-S6 Ribosomal Protein (Ser240/244) (61H9) Rabbit mAb #4838
| Applications | Reactivity | Sensitivity | MW (kDa) | Isotype |
|---|---|---|---|---|
| W IF-IC F | H M R Mk | Endogenous | 32 | Rabbit IgG |
Applications Key:
W=Western Blotting
IF-IC=Immunofluorescence (Immunocytochemistry)
F=Flow Cytometry
Reactivity Key:
H=Human
M=Mouse
R=Rat
Mk=Monkey
Species cross-reactivity is determined by Western blot.
Specificity / Sensitivity
Phospho-S6 Ribosomal Protein (Ser240/244) (61H9) Rabbit mAb detects endogenous levels of ribosomal protein S6 only when phosphorylated at serines 240 and 244.
Source / Purification
Monoclonal antibodies are produced by immunizing rabbits with a synthetic phospho-peptide (KLH-coupled) corresponding to residues surrounding Ser240 and Ser244 of human S6 ribosomal protein.
Western Blotting
Western blot analysis of extracts from 293, NIH/3T3 and C6 cells, treated with λ phosphatase or 20% serum as indicated, using Phospho-S6 Ribosomal Protein (Ser240/244) (61H9) Rabbit mAb (upper), or S6 Ribosomal Protein (5G10) Rabbit mAb #2217 (lower).
Flow Cytometry
Flow cytometric analysis of Jurkat cells, untreated (green), or LY294002, Wortmannin and U0126-treated (blue), using Phospho-S6 Ribosomal Protein (Ser240/244) (61H9) Rabbit mAb compared to a nonspecific negative control antibody (red).
IF-IC
Confocal immunofluorescent analysis of HeLa cells, LY294002-treated (left) or 20% serum-treated (right), using Phospho-S6 Ribosomal Protein (Ser240/244) (61H9) Rabbit mAb (green). Actin filaments have been labeled with Alexa Fluor® 555 phalloidin (red). Blue pseudocolor = DRAQ5™ (fluorescent DNA dye).
Background
One way that growth factors and mitogens effectively promote sustained cell growth and proliferation is by upregulating mRNA translation (1,2). Growth factors and mitogens induce the activation of p70 S6 kinase and the subsequent phosphorylation of the S6 ribosomal protein. Phosphorylation of S6 ribosomal protein correlates with an increase in translation of mRNA transcripts that contain an oligopyrimidine tract in their 5' untranslated regions (2). These particular mRNA transcripts (5'TOP) encode proteins involved in cell cycle progression as well as ribosomal proteins and elongation factors necessary for translation (2,3). Important S6 ribosomal protein phosphorylation sites include several residues (Ser235, Ser236, Ser240 and Ser244) located within a small, carboxy-terminal region of the S6 protein (4,5).
- Dufner, A. and Thomas, G. (1999) Exp. Cell Res. 253, 100-109.
- Peterson, R.T. and Schreiber, S.L. (1998) Curr. Biol. 8, R248-R250.
- Jefferies, H.B. et al. (1997) EMBO J. 16, 3693-3704.
- Ferrari, S. et al. (1991) J. Biol. Chem. 266, 22770-22775.
- Flotow, H. and Thomas, G. (1992) J. Biol. Chem. 267, 3074-3078.
Application References
Have you published research involving the use of our products? If so we'd love to hear about it. Please let us know!
Companion Products
- 2215 Phospho-S6 Ribosomal Protein (Ser240/244) Antibody
- 4858 Phospho-S6 Ribosomal Protein (Ser235/236) (D57.2.2E) Rabbit mAb
- 2217 S6 Ribosomal Protein (5G10) Rabbit mAb
- 2317 S6 Ribosomal Protein (54D2) Mouse mAb
- 7071 Phototope®-HRP Western Blot Detection System, Anti-rabbit IgG, HRP-linked Antibody
- 7074 Anti-rabbit IgG, HRP-linked Antibody
- 7720 Prestained Protein Marker, Broad Range (Premixed Format)
- 7727 Biotinylated Protein Ladder Detection Pack
- 7003 20X LumiGLO® Reagent and 20X Peroxide
Rabbit Monoclonals Produced Using Epitomics® Technology, U.S. Patent No. 5,675,063.
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.
