Function:Adapter involved in the TLR4 signaling pathway in the innate immune response. Acts via IRAK2 and TRAF-6 , leading to the activation of NF-kappa-B , MAPK1 , MAPK3 and JNK , resulting in cytokine secretion and the inflammatory response. ,polymorphism:Genetic variation in TIRAP can influence susceptibility or resistance to invasive pneumococcal disease , bacteremia , malaria and tuberculosi. ,similarity:Contains 1 TIR domain. ,subunit:Homodimer. Also forms heterodimers with MyD88. Binds to TLR4 and IRAK2 via their respective TIR domains. Binds to PKR and TBK1. Does not interact with IRAK1 , nor TLR9. ,tissue specificity:Highly expressed in liver , kidney , spleen , skeletal muscle and heart. Also detected in peripheral blood leukocytes , lung , placenta , small intestine , thymus , colon and brain. ,
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