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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Kvaratskhelia, Mamuka Yuan, Chunhua Hess, Sonja Larue, Ross C. Crowe, Brandon L. Foster, Mark P. |
| Description | Author Affiliation: Crowe BL ( Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210); Larue RC ( Center for Retrovirus Research and College of Pharmacy, The Ohio State University, Columbus, OH 43210); Yuan C ( Campus Chemical Instrument Center, The Ohio State University, Columbus, OH 43210); Hess S ( Proteome Exploration Laboratory, California Institute of Technology, Pasadena, CA 91125.); Kvaratskhelia M ( Center for Retrovirus Research and College of Pharmacy, The Ohio State University, Columbus, OH 43210); Foster MP ( Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210); |
| Abstract | The bromodomain and extraterminal domain (BET) protein family are promising therapeutic targets for a range of diseases linked to transcriptional activation, cancer, viral latency, and viral integration. Tandem bromodomains selectively tether BET proteins to chromatin by engaging cognate acetylated histone marks, and the extraterminal (ET) domain is the focal point for recruiting a range of cellular and viral proteins. BET proteins guide γ-retroviral integration to transcription start sites and enhancers through bimodal interaction with chromatin and the γ-retroviral integrase (IN). We report the NMR-derived solution structure of the Brd4 ET domain bound to a conserved peptide sequence from the C terminus of murine leukemia virus (MLV) IN. The complex reveals a protein-protein interaction governed by the binding-coupled folding of disordered regions in both interacting partners to form a well-structured intermolecular three-stranded ß sheet. In addition, we show that a peptide comprising the ET binding motif (EBM) of MLV IN can disrupt the cognate interaction of Brd4 with NSD3, and that substitutions of Brd4 ET residues essential for binding MLV IN also impair interaction of Brd4 with a number of cellular partners involved in transcriptional regulation and chromatin remodeling. This suggests that γ-retroviruses have evolved the EBM to mimic a cognate interaction motif to achieve effective integration in host chromatin. Collectively, our findings identify key structural features of the ET domain of Brd4 that allow for interactions with both cellular and viral proteins. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 8 |
| Volume Number | 113 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2016-02-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Integrases Chemistry Leukemia Virus, Murine Enzymology Nuclear Proteins Protein Folding Transcription Factors Viral Proteins Amino Acid Motifs Genetics Metabolism Protein Binding Protein Structure, Tertiary Structure-Activity Relationship Research Support, N.I.H., Extramural Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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