Catalyzes the reversible transfer of high energy ATP gamma-phosphate group to L-arginine. ATP + L-arginine = ADP + H(+) + N(omega)-phospho-L-arginine Muscle (at protein level). Causes an allergic reaction in human. Binds to IgE in all 4 patients tested allergic to crustaceans. Belongs to the ATP:guanido phosphotransferase family.