Predicted to enable DNA-binding transcription factor activity, RNA polymerase II-specific; RNA polymerase II transcription regulatory region sequence-specific DNA binding activity; and protein heterodimerization activity. Predicted to be involved in negative regulation of transcription, DNA-templated and regulation of transcription by RNA polymerase II. Predicted to act upstream of or within maternal behavior; negative regulation of transcription by RNA polymerase II; and startle response. Predicted to be located in nucleus. Orthologous to human NPAS1 (neuronal PAS domain protein 1). [provided by Alliance of Genome Resources, Apr 2022]