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The interferon-inducible myxovirus resistance (Mx) proteins play important roles in combating a wide range of virus infections. MxA inhibits many RNA and DNA viruses, whereas the antiviral activity of MxB is less well established. We find that human MxB inhibits HIV-1 infection by reducing the level of integrated viral DNA. Passaging HIV-1 through MxB-expressing cells allowed the evolution of a mutant...
Cellular acetylation signaling is important for viral gene regulation, particularly during the transactivation of retroviruses. The regulatory protein of bovine foamy virus (BFV), BTas, is a transactivator that augments viral gene transcription from both the long terminal repeat (LTR) promoter and the internal promoter (IP). In this study, we report that the histone acetyltransferase (HAT), p300,...
The BTas protein of bovine foamy virus (BFV) is a 249-amino-acid nuclear regulatory protein which transactivates viral gene expression directed by the long terminal repeat promoter (LTR) and the internal promoter (IP). Here, we demonstrate the BTas protein forms a dimeric complex in mammalian cells by using mammalian two hybrid systems and cross-linking assay. Functional analyses with deletion mutants...
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