Predicted to enable DNA-binding transcription repressor activity, RNA polymerase II-specific and RNA polymerase II cis-regulatory region sequence-specific DNA binding activity. Predicted to be involved in several processes, including negative regulation of transcription by RNA polymerase II; regulation of cell population proliferation; and spermatogenesis. Predicted to be located in male germ cell nucleus. Orthologous to human TCFL5 (transcription factor like 5). [provided by Alliance of Genome Resources, Apr 2022]