CST, 3104S, Phospho-SMAD2 (Ser245/250/255) Antibody

Polyclonal Antibody for studying Smad2 (Ser245/Ser250/Ser255) phosphate. Validated for Western Blotting. Highly specific and rigorously validated in-house, Phospho-SMAD2 (Ser245/250/255) Antibody (CST #3104) is ready to ship. Product Usage Information Western Blotting: 1:1000 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 Specificity / Sensitivity Phospho-SMAD2 (Ser245/250/255) Antibody detects endogenous levels of SMAD2 only when phosphorylated at serines 245, 250 or 255. Species Reactivity: Human, Mouse, Rat, Monkey Source / Purification Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding serines 245/250/255 of human SMAD2. Antibodies are purified by protein A and peptide affinity chromatography. Background Members of the SMAD family of signal transduction molecules are components of a critical intracellular pathway that transmit TGF-β signals from the cell surface into the nucleus. Three distinct classes of SMADs have been defined: the receptor-regulated SMADs (R-SMADs), which include SMAD1, 2, 3, 5, and 9; the common-mediator SMAD (co-SMAD), SMAD4; and the antagonistic or inhibitory SMADs (I-SMADs), SMAD6 and 7 (1-5). Activated type I receptors associate with specific R-SMADs and phosphorylate them on a conserved carboxy-terminal SSXS motif. The phosphorylated R-SMADs dissociate from the receptor and form a heteromeric complex with SMAD4, initiating translocation of the heteromeric SMAD complex to the nucleus. Once in the nucleus, SMADs recruit a variety of DNA binding proteins that function to regulate transcriptional activity (6-8). Oncogenic Ras antagonizes TGF-beta signaling and inhibits the nuclear accumulation of Smad2 and Smad3, which may be explained through MAP kinase dependent phosphorylation of these Smads (9).Cell stimulation with EGF leads to phosphorylation of Smad2 at a cluster of serine-proline sites within its linker region, including Ser245, 250, and 255 (9). Alternate Names hMAD-2; hSMAD2; JV18; JV18-1; MAD homolog 2; Mad protein homolog; Mad-related protein 2; MAD, mothers against decapentaplegic homolog 2; MADH2; MADR2; MGC22139; MGC34440; mother against DPP homolog 2; Mothers against decapentaplegic homolog 2; Mothers against DPP homolog 2; Sma- and Mad-related protein 2; SMAD 2; SMAD family member 2; SMAD, mothers against DPP homolog 2; SMAD2 Specification REACTIVITY: H M R Mk SENSITIVITY: Endogenous MW (kDa): 60 SOURCE: Rabbit