Is an ortholog of human HNF4A (hepatocyte nuclear factor 4 alpha) and HNF4G (hepatocyte nuclear factor 4 gamma). Exhibits SMAD binding activity and steroid hormone binding activity. Is involved in negative regulation of transcription by RNA polymerase II. Localizes to the nucleus. Is expressed in the alimentary system\; the epithelial system\; and the nervous system. Human ortholog(s) of this gene are implicated in maturity-onset diabetes of the young type 1 and type 2 diabetes mellitus.