Ras-related GTP binding C （RRAGC） is a monomeric guanine nucleotide-binding protein， or G protein. As a result of binding GTP or GDP， small G proteins act as molecular regulators in various cell processes and signaling pathways. RRAGC regulates the organization of the actin cytoskeleton and has an intrinsic GTPase activity. RRAGC is possibly necessary for the amino acid-induced relocalization of mTORC1 to the lysosomes and its succeeding activation by the GTPase RHEB， which is key step in the activation of the TOR signaling cascade by amino acids.
