Enables 2'-5'-oligoadenylate synthetase activity and double-stranded RNA binding activity. Involved in purine nucleotide biosynthetic process. Acts upstream of or within interleukin-27-mediated signaling pathway. Predicted to be active in cytosol; membrane; and nucleoplasm. Is expressed in central nervous system; retina; and thymus primordium. Orthologous to human OASL2P (2'-5' oligoadenylate synthetase like 2, pseudogene). [provided by Alliance of Genome Resources, Apr 2022]