Swiss-Prot Acc.Q03135.May act as a scaffolding protein within caveolar membranes (PubMed:11751885).
Forms a stable heterooligomeric complex with CAV2 that targets to lipid rafts and drives caveolae formation. Mediates the recruitment of CAVIN proteins (CAVIN1/2/3/4) to the caveolae (PubMed:19262564).
Interacts directly with G-protein alpha subunits and can functionally regulate their activity (By similarity).
Involved in the costimulatory signal essential for T-cell receptor (TCR)-mediated T-cell activation. Its binding to DPP4 induces T-cell proliferation and NF-kappa-B activation in a T-cell receptor/CD3-dependent manner (PubMed:17287217).
