function:Binds to GTP and possesses intrinsic GTPase activity. May play a role in mediating signal transduction (By similarity). May be involved in mediating the insulin secretory response to efaroxan.,similarity:Belongs to the small GTPase superfamily. RasD family.,subunit:Monomer .,tissue specificity:Pancreatic endocrine cells (islets of Langerhans).,
Cell membrane ; Lipid-anchor .
Pancreatic endocrine cells (islets of Langerhans).