Product Pathways - Translational Control
Nonphospho-4E-BP1 (Thr46) (87D12) Rabbit mAb #4923
| Applications | Reactivity | Sensitivity | MW (kDa) | Isotype |
|---|---|---|---|---|
| W F | H M R Mk | Endogenous | 15-20 | Rabbit IgG |
Applications Key:
W=Western Blotting
F=Flow Cytometry
Reactivity Key:
H=Human
M=Mouse
R=Rat
Mk=Monkey
Species cross-reactivity is determined by Western blot.
Specificity / Sensitivity
Nonphospho-4E-BP1 (Thr46) (87D12) Rabbit mAb detects endogenous levels of 4E-BP1 only when dephosphorylated at Thr46. The antibody cross-reacts with 4E-BP2 and 4E-BP3 dephosphorylated at equivalent sites.
Source / Purification
Monoclonal antibody is produced by immunizing rabbit with a synthetic peptide (KLH-coupled) corresponding to residues surrounding Thr46 of human 4E-BP1.
Western Blotting
Western blot analysis of extracts from COS cells, treated with λ phosphatase or 20% FBS as indicated, using Nonphospho-4E-BP1 (Thr46) (87D12) Rabbit mAb (upper), Phospho-4E-BP1 (Thr37/46) Antibody #9459 (middle), and 4E-BP1 Antibody #9452 (lower).
Flow Cytometry
Flow cytometric analysis of COS cells, untreated (blue) or λ phosphatase treated (green), using Nonphospho-4E-BP1 (Thr46) (87D12) Rabbit mAb compared to a nonspecific negative control antibody (red).
Background
Translation repressor protein 4E-BP1 (also known as PHAS-1) inhibits cap-dependent translation by binding to the eIF4E translation initiation factor. Hyperphosphorylation of 4E-BP1 disrupts this interaction and results in activation of cap-dependent translation (1). Both the PI3 kinase/Akt pathway and FRAP/mTOR kinase regulate 4E-BP1 activity (2,3). Multiple 4E-BP1 residues are phosphorylated in vivo (4). While phosphorylation by FRAP/mTOR on Thr37 and Thr46 does not prevent the binding of 4E-BP1 to eIF4E, it is thought to prime 4E-BP1 for subsequent phosphorylation at Ser65 and Thr70 (5).
- Pause, A. et al. (1994) Nature 371, 762-767.
- Brunn, G.J. et al. (1997) Science 277, 99-101.
- Gingras, A.C. et al. (1998) Genes Dev. 12, 502-513.
- Fadden, P. et al. (1997) J. Biol. Chem. 272, 10240-10247.
- Gingras, A.C. et al. (1999) Genes Dev. 13, 1422-1437.
Application References
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Companion Products
- 2855 Phospho-4E-BP1 (Thr37/46) (236B4) Rabbit mAb
- 9644 4E-BP1 (53H11) Rabbit mAb
- 9451 Phospho-4E-BP1 (Ser65) Antibody
- 9455 Phospho-4E-BP1 (Thr70) Antibody
- 2845 4E-BP2 Antibody
- 9452 4E-BP1 Antibody
- 9459 Phospho-4E-BP1 (Thr37/46) Antibody
- 9741 Phospho-eIF4E (Ser209) Antibody
- 9742 eIF4E Antibody
- 7216 PathScan® Phospho-4E-BP1 (Thr37/Thr46) Sandwich ELISA Kit
- 6310 SignalSilence® eIF4E siRNA Kit (Human Specific)
- 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.
