期刊
NATURE COMMUNICATIONS
卷 11, 期 1, 页码 -出版社
NATURE PUBLISHING GROUP
DOI: 10.1038/s41467-020-14299-9
关键词
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资金
- INSERM Interface Contract (2007-2011)
- French Ministry of Research and Technology
- ANR@RACTION (2017-2018)
- Agence Nationale pour la Recherche sur le SIDA et les hepatites virales (ANRS) [AO 2011-1, AO 2013-1, ECTZ8323, ECTZ27696, ECTZ66014]
- Agence Nationale de la Recherche (ANR@TRACTION)
- EU [667273 HEP-CAR]
- AbbVie
- Bayer Pharma AG
- Boehringer Ingelheim
- Canada Foundation for Innovation
- Eshelman Institute for Innovation
- Genome Canada
- Innovative Medicines Initiative (EU/EFPIA) [ULTRA-DD grant] [115766]
- Janssen
- Merck KGaA Darmstadt Germany
- MSD
- Novartis Pharma AG
- Ontario Ministry of Economic Development and Innovation
- Pfizer
- Sao Paulo Research Foundation FAPESP
- Takeda
- Wellcome [106169/ZZ14/Z]
Hepatitis Delta virus (HDV) is a satellite of Hepatitis B virus with a single-stranded circular RNA genome. HDV RNA genome synthesis is carried out in infected cells by cellular RNA polymerases with the assistance of the small hepatitis delta antigen (S-HDAg). Here we show that S-HDAg binds the bromodomain (BRD) adjacent to zinc finger domain 2B (BAZ2B) protein, a regulatory subunit of BAZ2B-associated remodeling factor (BRF) ISWI chromatin remodeling complexes. shRNA-mediated silencing of BAZ2B or its inactivation with the BAZ2B BRD inhibitor GSK2801 impairs HDV replication in HDV-infected human hepatocytes. S-HDAg contains a short linear interacting motif (SLiM) KacXXR, similar to the one recognized by BAZ2B BRD in histone H3. We found that the integrity of the S-HDAg SLiM sequence is required for S-HDAg interaction with BAZ2B BRD and for HDV RNA replication. Our results suggest that S-HDAg uses a histone mimicry strategy to co-activate the RNA polymerase II-dependent synthesis of HDV RNA and sustain HDV replication.
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