CST, 14724S, Phospho-FoxO3a (Ser7) Antibody

Polyclonal Antibody for studying FoxO3a (Ser7) phosphate. Validated for Western Blotting. Highly specific and rigorously validated in-house, Phospho-FoxO3a (Ser7) Antibody (CST #14724) 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-FoxO3a (Ser7) Antibody recognizes endogenous levels of FoxO3a protein only when phosphorylated at Ser7. Species Reactivity: Human, Mouse, Rat Source / Purification Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Ser7 of human FoxO3a protein. Antibodies are purified by protein A and peptide affinity chromatography. Background The Forkhead family of transcription factors is involved in tumorigenesis of rhabdomyosarcoma and acute leukemias (1-3). Within the family, three members (FoxO1, FoxO4, and FoxO3a) have sequence similarity to the nematode orthologue DAF-16, which mediates signaling via a pathway involving IGFR1, PI3K, and Akt (4-6). Active forkhead members act as tumor suppressors by promoting cell cycle arrest and apoptosis. Increased expression of any FoxO member results in the activation of the cell cycle inhibitor p27 Kip1. Forkhead transcription factors also play a part in TGF-β-mediated upregulation of p21 Cip1, a process negatively regulated through PI3K (7). Increased proliferation results when forkhead transcription factors are inactivated through phosphorylation by Akt at Thr24, Ser256, and Ser319, which results in nuclear export and inhibition of transcription factor activity (8). Forkhead transcription factors can also be inhibited by the deacetylase sirtuin (SirT1) (9). p38 phosphorlyates FoxO3a at Ser7 and promotes its nuclear localization (10). Alternate Names AF6q21; AF6q21 protein; DKFZp781A0677; FKHRL1; FKHRL1P2; forkhead box O3; forkhead box O3A; Forkhead box protein O3; forkhead homolog (rhabdomyosarcoma) like 1; Forkhead in rhabdomyosarcoma-like 1; forkhead, Drosophila, homolog of, in rhabdomyosarcoma-like 1; FOXO2; FOXO3; FOXO3A; MGC12739; MGC31925 Specification REACTIVITY: H M R SENSITIVITY: Endogenous MW (kDa): 82-97 SOURCE: Rabbit