Predicted to enable DNA-binding transcription factor activity, RNA polymerase II-specific and RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Predicted to be involved in regulation of transcription by RNA polymerase II. Predicted to act upstream of or within regulation of DNA-templated transcription. Predicted to be located in endoplasmic reticulum membrane. Predicted to be active in nucleus. Is expressed in digestive system; intestinal bulb; liver; and yolk syncytial layer. Orthologous to human CREB3L3 (cAMP responsive element binding protein 3 like 3).