Enables DNA-binding transcription factor activity, RNA polymerase II-specific; bile acid binding activity; and retinoid X receptor binding activity. Involved in several processes, including lipid homeostasis; negative regulation of cytokine production; and regulation of signal transduction. Acts upstream of or within several processes, including Notch signaling pathway; bile acid metabolic process; and negative regulation of very-low-density lipoprotein particle remodeling. Predicted to be located in euchromatin and nucleus. Predicted to be part of receptor complex. Is expressed in several structures, including 1st branchial arch; central nervous system; liver; sensory organ; and urinary system. Used to study hepatocellular carcinoma. 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). [provided by Alliance of Genome Resources, Apr 2022]