Enables chaperone binding activity and nuclear localization sequence binding activity. Involved in mitotic cell cycle. Located in cytoplasm and nuclear envelope. Part of nuclear pore. Human ortholog(s) of this gene implicated in Greenberg dysplasia; Pelger-Huet anomaly; and primary biliary cholangitis. Orthologous to human LBR (lamin B receptor). [provided by Alliance of Genome Resources, Apr 2022]