Enables DNA-binding transcription activator activity, RNA polymerase II-specific and RNA polymerase II transcription regulatory region sequence-specific DNA binding activity. Involved in negative regulation of transcription by RNA polymerase II. Acts upstream of or within central nervous system development and positive regulation of transcription by RNA polymerase II. Predicted to be active in nucleus. Is expressed in several structures, including alimentary system; central nervous system; genitourinary system; respiratory system; and sensory organ. Used to study Scheuermann's disease and Sotos syndrome. Human ortholog(s) of this gene implicated in Marshall-Smith syndrome and Sotos syndrome 2. Orthologous to human NFIX (nuclear factor I X). [provided by Alliance of Genome Resources, Apr 2022]