CST, 2441T, Phospho-eIF4G (Ser1108) Antibody

Polyclonal Antibody for studying eIF4G (Ser1147) phosphate. Validated for Western Blotting,Immunoprecipitation,Immunofluorescence (Immunocytochemistry). Available in 2 sizes. Highly specific and rigorously validated in-house, Phospho-eIF4G (Ser1108) Antibody (CST #2441) is ready to ship. Product Usage Information Western Blotting: 1:1000 Immunoprecipitation: 1:100 Immunofluorescence (Immunocytochemistry): 1:600 Storage Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at -20°C. Do not aliquot the antibody. Protocol Available protocols: Western Blotting, Immunoprecipitation, Immunofluorescence (Immunocytochemistry) Specificity / Sensitivity Phospho-eIF4G (Ser1108) Antibody detects eIF4GI only when phosphorylated at Ser1108. This antibody does not cross-react with nonphosphorylated eIF4GI or p97. Species Reactivity: Human, Mouse, Rat, Hamster, Monkey, Bovine Source / Purification Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser1108 of human eIF4GI. Antibodies are purified by protein A and peptide affinity chromatography. Background Eukaryotic initiation factor 4E (eIF4E) binds to the mRNA cap structure to mediate the initiation of translation (1,2). eIF4E interacts with eIF4G, a scaffold protein that promotes assembly of eIF4E and eIF4A into the eIF4F complex (2). eIF4B is thought to assist the eIF4F complex in translation initiation. Upon activation by mitogenic and/or stress stimuli mediated by Erk and p38 MAPK, Mnk1 phosphorylates eIF4E at Ser209 (3,4). Two Erk and p38 MAPK phosphorylation sites in mouse Mnk1 (Thr197 and Thr202) are essential for Mnk1 kinase activity (3). The carboxy-terminal region of eIF4G also contains serum-stimulated phosphorylation sites, including Ser1108, Ser1148, and Ser1192 (5). Phosphorylation at these sites is blocked by the PI3 kinase inhibitor LY294002 and by the FRAP/mTOR inhibitor rapamycin. Alternate Names DKFZp686A1451; eIF-4-gamma 1; eIF-4G 1; eIF-4G1; EIF4-gamma; EIF4F; EIF4G; EIF4G1; EIF4GI; eucaryotic translation initiation factor 4G; Eukaryotic translation initiation factor 4 gamma 1; eukaryotic translation initiation factor 4 gamma, 1; IF4G1; p220; PARK18 Specification REACTIVITY: H M R Hm Mk B SENSITIVITY: Endogenous MW (kDa): 220 SOURCE: Rabbit