Abstract
Brd4 protein has been proposed to act as a cellular receptor for the bovine papillomavirus type 1 (BPV1) E2 protein in the E2-mediated chromosome attachment and mitotic segregation of viral genomes. Here, we provide data that show the involvement of Brd4 in multiple early functions of the BPV1 life cycle, suggest a Brd4-dependent mechanism for E2-dependent transcription activation, and indicate the role of Brd4 in papillomavirus and polyomavirus replication as well as cell-specific utilization of Brd4-linked features in BPV1 DNA replication. Our data also show the potential therapeutic value of the disruption of the E2-Brd4 interaction for the development of antiviral drugs.
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