Enables DNA-binding transcription factor activity, RNA polymerase II-specific and sequence-specific DNA binding activity. Involved in several processes, including positive regulation of macromolecule biosynthetic process; positive regulation of neuron projection development; and response to cobalt ion. Located in nucleus. Part of transcription regulator complex. Biomarker of polycystic kidney disease. Orthologous to human ATF1 (activating transcription factor 1). [provided by Alliance of Genome Resources, Apr 2022]