Acts as a primer for viral genomic replication. DNA terminal protein is covalently linked to the 5'-ends of both strands of the genome through a phosphodiester bond between the beta-hydroxyl group of a serine residue and the 5'-phosphate of the terminal deoxyadenylate. This protein is essential for DNA replication and is involved in the priming of DNA elongation (By similarity). Hydrolyzes host peptidoglycans during virus entry. Heterodimer with viral polymerase. Binds to ssDNA (By similarity). Belongs to the phi29likevirus DNA terminal protein family.