Enables bile acid binding activity and nuclear receptor activity. Acts upstream of or within regulation of DNA-templated transcription. Predicted to be part of RNA polymerase II transcription regulator complex. Predicted to be active in nucleus. Is expressed in intestinal bulb and liver. Human ortholog(s) of this gene implicated in extrahepatic cholestasis; hepatocellular carcinoma; and progressive familial intrahepatic cholestasis 5. Orthologous to human NR1H4 (nuclear receptor subfamily 1 group H member 4).