Enables interleukin-2 binding activity and interleukin-2 receptor activity. Involved in cytokine-mediated signaling pathway and natural killer cell activation. Located in cell surface. Human ortholog(s) of this gene implicated in asthma; immunodeficiency 63; myasthenia gravis; and visceral leishmaniasis. Orthologous to human IL2RB (interleukin 2 receptor subunit beta). [provided by Alliance of Genome Resources, Apr 2022]