Although herpesvirus lytic origin-binding proteins are quite diverse, there are a few limited similarities. HSV UL9 and CMV UL84 share DExD/H box similarities, and most of these proteins contain leucine zipper or pseudo zipper domains (blue and purple boxes). Many of these regions bind to the cellular protein C/EBP-α (also shown).
CMV: Cytomegalovirus; EBV: Epstein–Barr virus; HSV: Herpes simplex virus; KSHV: Kaposi’s sarcoma-associated herpesvirus.