Biological Assembly 1  

 3D View: Structure

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 12.15 kDa 
• Atom Count: 799 
• Residue Count: 96 
• Unique protein chains: 2

2N3K

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

• DOI: 10.2210/pdb2N3K/pdb
• BMRB: 25649

• Classification: PROTEIN BINDING
• Organism(s): Homo sapiens, Moloney murine leukemia virus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2015-06-03 Released: 2016-03-02 
• Deposition Author(s): Crowe, B.L., Foster, M.P.

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Experimental Data Snapshot

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

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

• PubMed: 26858406 
• 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 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.

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Organizational Affiliation: 

Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH 43210; [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Bromodomain-containing protein 4	A	86	Homo sapiens	Mutation(s): 0  Gene Names: BRD4, HUNK1
Find proteins for O60885 (Homo sapiens) Explore O60885  Go to UniProtKB:  O60885
NIH Common Fund Data Resources
PHAROS  O60885 GTEx  ENSG00000141867

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
MLV integrase	B	17	Moloney murine leukemia virus	Mutation(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

Experimental Data & Validation

Experimental Data

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

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2015-06-03 
• Released Date: 2016-03-02 
Deposition Author(s): Crowe, B.L., Foster, M.P.

Revision History 

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