In response to IL-12 binding, the IL-12 receptor activates the Jak kinases, which phosphorylate tyrosine residues of IL-12Rβ2. These phosphorylated receptors recruit Stat4 through its SH2 domain, whereupon Stat4 is phosphorylated at Tyr693 in its C-terminal transactivation domain. Phosphorylation promotes Stat4 homodimerization and translocation to the nucleus, where it promotes gene transcription. The N-terminal domain of Stat4 appears to be required for maximal stabilization and for the binding of Stat4 dimers to lower-affinity DNA binding sites. Stat4-deficient mice have demonstrated that this gene is required to both promote Th1 development and inhibit Th2 differentiation due to disabling IL-12 receptor-mediated responses.
Predicted to work with mouse, rat and other homologues.
Detection
Anti-Rabbit IgG
Clonality
Monoclonal
Immunogen
A synthetic phospho-peptide corresponding to residues surrounding Tyr693 of human phospho Stat4
Formulation
1X PBS, 0.02% NaN3, 50% Glycerol, 0.1% BSA
Isotype
Rabbit IgGk
Preparation
Protein A+G
Recommended Usage
For flow cytometric staining, the suggested use of this reagent is 5 µL per million cells or 5 µL per 100 µL of staining volume. It is recommended that the reagent be titrated for optimal performance for each application. See product image legends for additional information.
Kaplan MH, Sun Y, Hoey T, and Grusby MJ. (1996) Nature. 382: 174-177.
Chang H, Zhang S, Oldham I, Naeger L, Hoey T, and Kaplan MH. (2003) Journal of Biological Chemistry. 278: 32471-32477
