2N3K

Human Brd4 ET domain in complex with MLV Integrase C-term


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 150 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Structure of the Brd4 ET domain bound to a C-terminal motif from gamma-retroviral integrases reveals a conserved mechanism of interaction.

Crowe, B.L.Larue, R.C.Yuan, C.Hess, S.Kvaratskhelia, M.Foster, M.P.

(2016) Proc Natl Acad Sci U S A 113: 2086-2091

  • DOI: 10.1073/pnas.1516813113
  • Primary Citation of Related Structures:  
    2N3K

  • PubMed 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 pro ...

    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 β 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.


    Organizational Affiliation

    Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210; foster.281@osu.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Bromodomain-containing protein 4A86Homo sapiensMutation(s): 0 
Gene Names: BRD4HUNK1
Find proteins for O60885 (Homo sapiens)
Explore O60885 
Go to UniProtKB:  O60885
NIH Common Fund Data Resources
PHAROS  O60885
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
MLV integraseB17Moloney murine leukemia virusMutation(s): 0 
Gene Names: gag-pro-pol
EC: 2.7.7.49 (UniProt), 2.7.7.7 (UniProt), 3.1.26.4 (UniProt)
Find proteins for Q8UN00 (Moloney murine leukemia virus)
Explore Q8UN00 
Go to UniProtKB:  Q8UN00
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 150 
  • Conformers Submitted: 20 
  • Selection Criteria: target function 
  • OLDERADO: 2N3K Olderado

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-03-02
    Type: Initial release
  • Version 1.1: 2016-03-23
    Changes: Database references