Predicted to enable RNA polymerase II cis-regulatory region sequence-specific DNA binding activity and nuclear receptor activity. Involved in determination of adult lifespan; positive regulation of transcription from RNA polymerase II promoter in response to stress; and regulation of fatty acid metabolic process. Located in cytoplasm and nucleus. Expressed in hypodermis; intestinal cell; intestine; muscle cell; and neurons. Used to study alcohol use disorder and obesity. Human ortholog(s) of this gene implicated in several diseases, including Fanconi renotubular syndrome 4; glucose metabolism disease (multiple); and liver disease (multiple). Is an ortholog of human HNF4A (hepatocyte nuclear factor 4 alpha).