Human papillomavirus type 11 replication protein E1 (E1)

Human papillomavirus type 11 (HPV11) replication protein E1 is a multifunctional viral enzyme essential for the replication and maintenance of the viral genome (UniProt P04014). As an ATP-dependent DNA helicase, E1 recognizes and binds to the viral origin of replication, typically in a cooperative complex with the E2 regulatory protein (PubMed 8623484). Once bound, E1 assembles into hexameric rings that unwind the double-stranded DNA template and recruit host cell replication machinery, such as DNA polymerase alpha-primase, to initiate viral DNA synthesis (PMC232004). HPV11 is a low-risk HPV type primarily associated with benign but clinically significant conditions, including genital warts (condyloma acuminatum) and recurrent respiratory papillomatosis (PubMed 15149184). Given its central role in the viral life cycle and its unique enzymatic activity compared to host proteins, E1 is considered a high-priority target for the development of anti-HPV therapeutics (PMC2811635). Drug discovery efforts have focused on small molecules that disrupt the critical E1-E2 protein-protein interaction or inhibit the ATPase and helicase activities of the E1 protein itself (Saucedo-Mendiola et al., 2019). Classes of inhibitors such as indandiones and repaglinide derivatives have demonstrated the ability to block viral DNA replication in vitro and in cell-based models (PubMed 15149184). Targeting E1 offers a specific approach to treating HPV11-related diseases by directly halting the production of new viral particles and reducing viral load in infected tissues.

Other names

E1 proteinATP-dependent helicase E1DNA 3'-5' helicase E1HPV11 E1Replication protein E1

Inhibition of E1-E2 protein-protein interaction, inhibition of E1 ATPase activity, and inhibition of E1 helicase activity (PMC2811635, PubMed 15149184).