Human papillomavirus type 11 E2 protein (HPV-11 E2)

The Human papillomavirus type 11 (HPV-11) E2 protein is a multifunctional regulatory factor that is indispensable for the viral life cycle (UniProt: P04015). It functions as a sequence-specific DNA-binding protein that regulates the transcription of viral early genes, including the E6 and E7 oncogenes, and plays a central role in viral DNA replication (PubMed: 15105485). By forming a high-affinity complex with the viral E1 helicase, E2 facilitates the recruitment of E1 to the viral origin of replication, an essential step for initiating genome amplification (NCBI: BK000632). HPV-11 is a low-risk genotype primarily associated with benign but clinically burdensome lesions such as genital warts and recurrent respiratory papillomatosis (NIH: StatPearls). Because the E1-E2 interaction is a bottleneck for viral persistence, it has become a major focus for antiviral drug development. Small molecule inhibitors, such as BILH 434, have been designed to disrupt this protein-protein interaction, effectively halting viral replication in preclinical models (PubMed: 12134021). Despite its potential, no E2-targeted therapies have yet reached clinical approval, though research continues into optimizing these inhibitors for human use.

Other names

Regulatory protein E2E2 proteinHPV11E2Genome maintenance protein E2

Inhibition of the protein-protein interaction between the viral E1 helicase and the E2 regulatory protein, which prevents the recruitment of the replication machinery to the viral origin of replication (PubMed: 12134021).