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GPRASP2 seems to play a key role in the signaling of the hedgehog pathway in the primary cilium through a Smoothened-GPRASP2-Pifo complex. Identified small compound inhibitors of this complex could treat drug-resistant smoothened derived cancer forms. Deletion of GPRASP2 in mice causes neurodevelopmental alteration and affects mGluR5 regulation, reflected by autism-like behavior. Several members of subfamily 2, in complex with TRAK2 and MIRO, are involved in the trafficking of mitochondria in axons and in the regulation of their size a