Enables RNA polymerase II-specific DNA-binding transcription factor binding activity. Involved in negative regulation of dauer larval development; negative regulation of miRNA transcription; and regulation of development, heterochronic. Located in cytoplasm and nucleus. Expressed in head; hyp7
syncytium; and pharyngeal muscle cell. Human ortholog(s) of this gene implicated in advanced sleep phase syndrome 1. Is an ortholog of human PER1 (period circadian regulator 1) and PER2 (period circadian regulator 2).