TICAM-2, also known as TRIF-related adaptor molecule (TRAM), is a TIR domain containing protein that was found to act as an adaptor molecule during LPS-induced innate immune response. Upon infection by Gram-negative bacteria, TLR4 specifically recognizes LPS and leads to the dimerization of the cytoplasmic TIR domains. The activated TLR4 subsequently recruits the adaptor protein complex containing both TICAM-1 and TICAM-2, resulting in the activation of IFN response factors and production of pro-inflammatory cytokines. In this signaling cascade, TICAM-2 is essential for bridging the interaction between TLR4 and TICAM-1. TICAM-2 is also involved in the regulation of the IL-18 signaling pathway, acting as a sorting adaptor that recruits MYD88 from the cytosol to the membrane region upon activation of IL-1/IL-18 receptors.