Predicted to enable DNA-binding transcription factor binding activity and transcription regulator inhibitor activity. Predicted to be involved in negative regulation of circadian rhythm and negative regulation of transcription, DNA-templated. Predicted to be located in nuclear speck. Predicted to be part of Cry-Per complex. Orthologous to human PASD1 (PAS domain containing repressor 1). [provided by Alliance of Genome Resources, Apr 2022]