6UVM

Cocrystal of BRD4(D1) with a methyl carbamate thiazepane inhibitor


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.51 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.191 

Starting Model: experimental
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Literature

Evaluating the Advantages of Using 3D-Enriched Fragments for Targeting BET Bromodomains.

Johnson, J.A.Nicolaou, C.A.Kirberger, S.E.Pandey, A.K.Hu, H.Pomerantz, W.C.K.

(2019) ACS Med Chem Lett 10: 1648-1654

  • DOI: https://doi.org/10.1021/acsmedchemlett.9b00414
  • Primary Citation of Related Structures:  
    6UVJ, 6UVM, 6UWX

  • PubMed Abstract: 

    Fragment-based ligand discovery has been successful in targeting diverse proteins. Despite drug-like molecules having more 3D character, traditional fragment libraries are largely composed of flat, aromatic fragments. The use of 3D-enriched fragments for enhancing library diversity is underexplored especially against protein-protein interactions. Here, we evaluate using 3D-enriched fragments against bromodomains. Bromodomains are highly ligandable, but selectivity remains challenging, particularly for bromodomain and extraterminal (BET) family bromodomains. We screened a 3D-enriched fragment library against BRD4(D1) via 1 H CPMG NMR with a protein-observed 19 F NMR secondary assay. The screen led to 29% of the hits that are selective over two related bromodomains, BRDT(D1) and BPTF, and the identification of underrepresented chemical bromodomain inhibitor scaffolds. Initial structure-activity relationship studies guided by X-ray crystallography led to a ligand-efficient thiazepane, with good selectivity and affinity for BET bromodomains. These results suggest that the incorporation of 3D-enriched fragments to increase library diversity can benefit bromodomain screening.


  • Organizational Affiliation

    Department of Chemistry, University of Minnesota, Minneapolis, Minnesota 55455, United States.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Bromodomain-containing protein 4127Homo sapiensMutation(s): 0 
Gene Names: BRD4HUNK1
UniProt & NIH Common Fund Data Resources
Find proteins for O60885 (Homo sapiens)
Explore O60885 
Go to UniProtKB:  O60885
PHAROS:  O60885
GTEx:  ENSG00000141867 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO60885
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
QJA (Subject of Investigation/LOI)
Query on QJA

Download Ideal Coordinates CCD File 
B [auth A]1-[(7S)-7-(thiophen-2-yl)-6,7-dihydro-1,4-thiazepin-4(5H)-yl]ethan-1-one
C11 H13 N O S2
HQSICPPXMQFZST-NSHDSACASA-N
EDO
Query on EDO

Download Ideal Coordinates CCD File 
C [auth A]1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.51 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 37.359α = 90
b = 44.24β = 90
c = 78.326γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XDSdata scaling
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Library of Medicine (NIH/NLM)United States5T32GM008347-23

Revision History  (Full details and data files)

  • Version 1.0: 2020-01-01
    Type: Initial release
  • Version 1.1: 2023-10-11
    Changes: Advisory, Data collection, Database references, Refinement description