Enables DNA-binding transcription repressor activity, RNA polymerase II-specific and RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Involved in negative regulation of transcription by RNA polymerase II. Acts upstream of or within heart development and kidney development. Predicted to be located in aggresome; cytosol; and nucleolus. Predicted to be active in nucleoplasm. Is expressed in ureter. Orthologous to human ZBTB14 (zinc finger and BTB domain containing 14). [provided by Alliance of Genome Resources, Apr 2022]