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Structural basis underlying viral hijacking of a histone chaperone complex

Hongda Huang, Zhong Deng, Olga Vladimirova, Andreas Wiedmer, Fang Lu, Paul M. Lieberman () and Dinshaw J. Patel ()
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Hongda Huang: Structural Biology Program, Memorial Sloan-Kettering Cancer Center
Zhong Deng: Gene Expression and Regulation Program, The Wistar Institute
Olga Vladimirova: Gene Expression and Regulation Program, The Wistar Institute
Andreas Wiedmer: Gene Expression and Regulation Program, The Wistar Institute
Fang Lu: Gene Expression and Regulation Program, The Wistar Institute
Paul M. Lieberman: Gene Expression and Regulation Program, The Wistar Institute
Dinshaw J. Patel: Structural Biology Program, Memorial Sloan-Kettering Cancer Center

Nature Communications, 2016, vol. 7, issue 1, 1-10

Abstract: Abstract The histone H3.3 chaperone DAXX is implicated in formation of heterochromatin and transcription silencing, especially for newly infecting DNA virus genomes entering the nucleus. Epstein-Barr virus (EBV) can efficiently establish stable latent infection as a chromatinized episome in the nucleus of infected cells. The EBV tegument BNRF1 is a DAXX-interacting protein required for the establishment of selective viral gene expression during latency. Here we report the structure of BNRF1 DAXX-interaction domain (DID) in complex with DAXX histone-binding domain (HBD) and histones H3.3-H4. BNRF1 DID contacts DAXX HBD and histones through non-conserved loops. The BNRF1-DAXX interface is responsible for BNRF1 localization to PML-nuclear bodies typically associated with host-antiviral resistance and transcriptional repression. Paradoxically, the interface is also required for selective transcription activation of viral latent cycle genes required for driving B-cell proliferation. These findings reveal molecular details of virus reprogramming of an antiviral histone chaperone to promote viral latency and cellular immortalization.

Date: 2016
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms12707

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DOI: 10.1038/ncomms12707

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