Does not have 2'-5'-OAS activity, but can bind double- stranded RNA. Displays antiviral activity against encephalomyocarditis virus (EMCV) and hepatitis C virus (HCV) via an alternative antiviral pathway independent of RNase L. {ECO:0000269|PubMed:18931074, ECO:0000269|PubMed:20074559, ECO:0000269|PubMed:9826176}. This is the function of OASL (2'-5'-oligoadenylate synthetase like, Ensembl gene identifier ENSG00000135114).