Predicted to enable DNA binding activity. Predicted to contribute to DNA-binding transcription activator activity, RNA polymerase II-specific and RNA polymerase II transcription regulatory region sequence-specific DNA binding activity. Predicted to be involved in positive regulation of transcription by RNA polymerase II. Predicted to act upstream of or within positive regulation of transcription, DNA-templated. Predicted to be located in nuclear speck. Predicted to be part of RNA polymerase II transcription regulator complex. Predicted to be active in nucleus. Human ortholog(s) of this gene implicated in MHC class II deficiency. Orthologous to human RFXAP (regulatory factor X associated protein). [provided by Alliance of Genome Resources, Apr 2022]