Transcription factor that is involved in the regulation of muscle stem cells proliferation, playing a role in myogenesis and muscle regeneration. Can bind to DNA as a heterodimer with PAX3. Interacts with DAXX (By similarity). Interacts with PAXBP1; the interaction links PAX7 to a WDR5-containing histone methyltransferase complex (PubMed:22862948). Expressed specifically during the development of the nervous and muscular system. Belongs to the paired homeobox family.