This protein is activated by the insulin/insulin (insulin-like)-receptor system. This transition enables the ras protein to interact with the lectin-receptor/lectin complex, a process which ultimately lead to an initiation of an intra-cellular signal-transduction chain. GTP + H2O = GDP + H(+) + phosphate Alternates between an inactive form bound to GDP and an active form bound to GTP. Activated by a guanine nucleotide-exchange factor (GEF) and inactivated by a GTPase-activating protein (GAP). Phosphorylated in the presence of insulin. Belongs to the small GTPase superfamily. Ras family.