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Phospho-FoxO1 (Ser256) (E1F7T) Rabbit Monoclonal Antibody #84192

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  • WB
  • IP

    Product Specifications

    REACTIVITY H M R Mk
    SENSITIVITY Endogenous
    MW (kDa) 82
    Source/Isotype Rabbit IgG
    Application Key:
    • WB-Western Blotting 
    • IP-Immunoprecipitation 
    Species Cross-Reactivity Key:
    • H-Human 
    • M-Mouse 
    • R-Rat 
    • Mk-Monkey 

    Product Information

    Product Usage Information

    Application Dilution
    Western Blotting 1:1000
    Immunoprecipitation 1:50

    Storage

    Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA, 50% glycerol and less than 0.02% sodium azide. Store at –20°C. Do not aliquot the antibody.

    Protocol

    Specificity / Sensitivity

    Phospho-FoxO1 (Ser256) (E1F7T) Rabbit Monoclonal Antibody recognizes endogenous levels of FoxO1 protein only when phosphorylated at Ser256. This antibody cross-reacts with overexpressed FoxO4 phosphorylated at Ser193 and may cross-react with overexpressed FoxO3a phosphorylated at Ser253. This antibody also cross-reacts with a protein of unknown origin around 160kD.

    Species Reactivity:

    Human, Mouse, Rat, Monkey

    Source / Purification

    Monoclonal antibody is produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Ser256 of human FoxO1 protein.

    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).

    Alternate Names

    FKH1; FKHR; forkhead box O1; forkhead box O1A (rhabdomyosarcoma); Forkhead box protein O1; Forkhead box protein O1A; forkhead homolog in rhabdomyosarcoma; Forkhead in rhabdomyosarcoma; forkhead, Drosophila, homolog of, in rhabdomyosarcoma; FOXO1; FOXO1A

    For Research Use Only. Not for Use in Diagnostic Procedures.
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