Predicted to enable protein kinase binding activity; type I interferon binding activity; and type I interferon receptor activity. Predicted to be involved in defense response to other organism; response to interferon-alpha; and response to interferon-beta. Predicted to act upstream of or within cell population proliferation and regulation of transcription by RNA polymerase II. Predicted to be located in extracellular space. Predicted to be integral component of plasma membrane. Human ortholog(s) of this gene implicated in hepatitis B and immunodeficiency 45. Orthologous to human IFNAR2 (interferon alpha and beta receptor subunit 2). [provided by Alliance of Genome Resources, Apr 2022]