Enables interleukin-2 receptor activity. Involved in inflammatory response to antigenic stimulus; positive regulation of T cell differentiation; and positive regulation of T cell proliferation. Located in cell surface. Used to study Korean hemorrhagic fever; asthma; and diabetes mellitus. Human ortholog(s) of this gene implicated in immunodeficiency 41; lymphopenia; multiple sclerosis; type 1 diabetes mellitus; and type 1 diabetes mellitus 10. Orthologous to human IL2RA (interleukin 2 receptor subunit alpha). [provided by Alliance of Genome Resources, Apr 2022]