Cyclin G associated kinase interacts with interleukin 12 receptor β2 and suppresses interleukin 12 induced IFN‐γ production
2007
Interleukin 12 receptor β1 (IL-12Rβ1) and β2 (IL-12Rβ2) constitute the functional and high-affinity receptor complex for interleukin 12 (IL-12) and mediate important functions in activated T cells. In this study, we identified cyclin G associated kinase (GAK) as a new IL-12Rβ2-interacting protein using yeast two-hybrid system and confirmed it by coimmunoprecipitation assays. Overexpression of GAK in activated T cells suppresses IL-12 induced IFN-γ production but has no detectable effects on its proliferation, whereas knockdown of GAK by RNA interference (RNAi) increases IFN-γ production. These results suggest that GAK associates with IL-12Rβ2 and may play a role in regulating IL-12 signaling.
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