8DNQ

BRD2-BD1 in complex with cyclic peptide 2.2B


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.211 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Discovery and characterization of cyclic peptides selective for the C-terminal bromodomains of BET family proteins.

Franck, C.Patel, K.Walport, L.J.Christie, M.Norman, A.Passioura, T.Suga, H.Payne, R.J.Mackay, J.P.

(2023) Structure 31: 912-923.e4

  • DOI: https://doi.org/10.1016/j.str.2023.05.009
  • Primary Citation of Related Structures:  
    8CV4, 8CV5, 8CV6, 8CV7, 8DNQ

  • PubMed Abstract: 

    DNA-encoded cyclic peptide libraries can yield high-potency, high-specificity ligands against target proteins. We used such a library to seek ligands that could distinguish between paralogous bromodomains from the closely related bromodomain and extra-terminal domain family of epigenetic regulators. Several peptides isolated from a screen against the C-terminal bromodomain of BRD2, together with new peptides discovered in previous screens against the corresponding domain from BRD3 and BRD4, bound their targets with nanomolar and sub-nanomolar affinities. X-ray crystal structures of several of these bromodomain-peptide complexes reveal diverse structures and binding modes, which nevertheless display several conserved features. Some peptides demonstrate significant paralog-level specificity, although the physicochemical explanations for this specificity are often not clear. Our data demonstrate the power of cyclic peptides to discriminate between very similar proteins with high potency and hint that differences in conformational dynamics might modulate the affinity of these domains for particular ligands.


  • Organizational Affiliation

    School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia; Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Sydney, Sydney, NSW 2006, Australia.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Bromodomain-containing protein 2
A, B
135Homo sapiensMutation(s): 0 
Gene Names: BRD2
UniProt & NIH Common Fund Data Resources
Find proteins for P25440 (Homo sapiens)
Explore P25440 
Go to UniProtKB:  P25440
PHAROS:  P25440
GTEx:  ENSG00000204256 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP25440
Sequence Annotations
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  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Cyclic peptide 2.2B
C, D
17synthetic constructMutation(s): 0 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.209 
  • R-Value Observed: 0.211 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.682α = 90
b = 54.37β = 93.85
c = 76.924γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Health and Medical Research Council (NHMRC, Australia)Australia--

Revision History  (Full details and data files)

  • Version 1.0: 2023-07-19
    Type: Initial release
  • Version 1.1: 2023-10-25
    Changes: Data collection, Refinement description
  • Version 1.2: 2023-11-15
    Changes: Data collection
  • Version 1.3: 2023-12-06
    Changes: Database references