Predicted to enable RNA polymerase I core promoter sequence-specific DNA binding activity. Predicted to be involved in RNA polymerase I preinitiation complex assembly and nucleolar large rRNA transcription by RNA polymerase I. Predicted to be located in nucleolus and nucleoplasm. Predicted to be part of RNA polymerase I core factor complex and RNA polymerase transcription factor SL1 complex. Orthologous to human TAF1B (TATA-box binding protein associated factor, RNA polymerase I subunit B). [provided by Alliance of Genome Resources, Apr 2022]