antibody

Protein Synthesis Initiation Factor 4G, phosphorylated (Ser1108) (eIF 4G, Eukaryotic Translation Initiation Factor )

P9108-52

100 ul

polyclonal

domestic rabbit

nonconjugated

phosphorylated

Protein Synthesis Initiation Factor 4G, phosphorylated (Ser1108) (eIF 4G, Eukaryotic Translation Initiation Factor )

rabbit

Pab

Phosphorylated

Antibodies

100 ul

IgG

Eukaryotic initiation factor 4E (eIF4E) binds to the mRNA cap structure, thereby mediating the initiation of translation (1,2). eIF4E interacts with eIF4G, which serves as a scaffold protein for the assembly of eIF4E and eIF4A to form the eIF4F complex (2). Upon activation by mitogenic and/or stress stimuli mediated by Erk and p38 MAPK, Mnk1 has been shown to phosphorylate eIF4E at Ser209 in vivo (3,4). Two Erk and p38 MAPK phosphorylation sites have been identified in mouse Mnk1, Thr197 and Thr202, which are essential for Mnk1 kinase activity (3). The C-terminal region of eIF4G also contains serum-stimulated phosphorylation sites, including Ser1108, Ser1148 and Ser1192 (5). It is known that their phosphorylation is blocked by the PI3 kinase inhibitor LY294002 and by the FRAP/mTOR inhibitor rapamycin. Applications: Suitable for use in ELISA, Western Blot, Immunoprecipitation, Immunocytochemistry and Immunofluorescence. Other applications not tested. Recommended Dilution: Western Blot: 1:1000 Immunoprecipitation: 1:100 Immunofluorescence (IF-IC): 1:100 Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4°C for short-term only. For long-term storage, store at -20°C. Aliquots are stable for at least 12 months at -20°C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.

Bo Hm Hu Mk Mo Rt

Synthetic phosphopeptide corresponding to residues surrounding Ser1108 of human eIF4GI (KLH).

Recognizes human eIF4GI only when phosphorylated at Ser1108. Does not crossreact with non-phosphorylated eIF4GI or p97. Species Crossreactivity: bovine, hamster, monkey, mouse and rat.

Purified by Protein A affinity chromatography.

Supplied as a liquid in 10mM HEPES, pH 7.5, 150mM sodium chloride, 0.1mg/ml BSA, 50% glycerol. No preservative added.

Not determined

Product Type: Pab Isotype: IgG Host: rabbit Source: human Concentration: Not determined Form: Supplied as liquid in 10mM HEPES, pH 7.5, 150mM sodium chloride, 0.1mg/ml BSA, 50% glycerol. No preservative added. Purity: Purified by Protein A affinity chromatography. Immunogen: Synthetic phosphopeptide corresponding to residues surrounding Ser1108 of human eIF4GI (KLH). Specificity: Recognizes human eIF4GI only when phosphorylated at Ser1108. Does not crossreact with non-phosphorylated eIF4GI or p97. Species Crossreactivity: bovine, hamster, monkey, mouse and rat. Important Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.

E IC IF IP WB

-20°C

1. Sonenberg, N. et al. (1978) Proc. Natl. Acad. Sci. USA 75, 4843–4847. 2. Gingras, A. C. et al. (1999) Annu. Rev. Biochem. 68, 913–963. 3. Waskiewicz, A. et al. (1999) Mol. Cell. Biol. 19, 1871–1880. 4. Pyronnet, S. et al. (1999) EMBO J. 18, 270–279. 5. Raught, B. et al. (2000) EMBO J. 19, 434–444.

https://usbio-images.r.worldssl.net/prodimages/4/P9108-52_1.jpg

Immunofluorescent detection of HeLa cells, untreated (left) or thapsigargin-treated (300nM) (right), using P9108-52.