Enables DNA-binding transcription factor binding activity and nuclear import signal receptor activity. Acts upstream of or within entry of viral genome into host nucleus through nuclear pore complex via importin; positive regulation of viral life cycle; and protein import into nucleus. Located in cytoplasmic stress granule. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; respiratory system; and sensory organ. Orthologous to human KPNA2 (karyopherin subunit alpha 2). [provided by Alliance of Genome Resources, Apr 2022]