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The evolutionarily conserved DNA topoisomerase II beta-binding protein 1 (TopBP1) functions in DNA replication, DNA damage response, and cell survival. We analyzed the role of TopBP1 in human and bovine papillomavirus genome replication. Consistent with prior reports, TopBP1 co-localized in discrete nuclear foci and was in complex with papillomavirus E2 protein. Similar to E2, TopBP1 is recruited...
The crystal structure of the E2 DNA-binding domain from the high-risk cervical cancer-associated strain human papillomavirus type 16 (HPV-16) is described here. The papillomavirus E2 proteins regulate transcription from all viral promoters and are required for the initiation of replication in vivo. They belong to a family of viral proteins that form dimeric β-barrels and use surface α-helices for...
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