Interferon-induced dynamin-like GTPase with antiviral activity against vesicular stomatitis virus (VSV) and Hantaan virus (HNTV). By type I and type III interferons. The Mx2 gene is non-functional in all laboratory mouse strains examined. It is functional in feral strains. Belongs to the TRAFAC class dynamin-like GTPase superfamily. Dynamin/Fzo/YdjA family.