Predicted to enable nuclear import signal receptor activity and nuclear localization sequence binding activity. Predicted to be involved in protein import into nucleus. Predicted to act upstream of or within intracellular protein transport. Predicted to be active in cytoplasm and nucleus. Human ortholog(s) of this gene implicated in intellectual developmental disorder with hypotonia, impaired speech, and dysmorphic facies. Orthologous to human TNPO2 (transportin 2).