4J0S

Crystal Structure of the first bromodomain of human BRD4 in complex with a 3,5-dimethylisoxazol ligand


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.159 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Optimization of 3,5-dimethylisoxazole derivatives as potent bromodomain ligands.

Hewings, D.S.Fedorov, O.Filippakopoulos, P.Martin, S.Picaud, S.Tumber, A.Wells, C.Olcina, M.M.Freeman, K.Gill, A.Ritchie, A.J.Sheppard, D.W.Russell, A.J.Hammond, E.M.Knapp, S.Brennan, P.E.Conway, S.J.

(2013) J.Med.Chem. 56: 3217-3227

  • DOI: 10.1021/jm301588r
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The bromodomain protein module, which binds to acetylated lysine, is emerging as an important epigenetic therapeutic target. We report the structure-guided optimization of 3,5-dimethylisoxazole derivatives to develop potent inhibitors of the BET (bro ...

    The bromodomain protein module, which binds to acetylated lysine, is emerging as an important epigenetic therapeutic target. We report the structure-guided optimization of 3,5-dimethylisoxazole derivatives to develop potent inhibitors of the BET (bromodomain and extra terminal domain) bromodomain family with good ligand efficiency. X-ray crystal structures of the most potent compounds reveal key interactions required for high affinity at BRD4(1). Cellular studies demonstrate that the phenol and acetate derivatives of the lead compounds showed strong antiproliferative effects on MV4;11 acute myeloid leukemia cells, as shown for other BET bromodomain inhibitors and genetic BRD4 knockdown, whereas the reported compounds showed no general cytotoxicity in other cancer cell lines tested.


    Organizational Affiliation

    Department of Chemistry, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford, OX1 3TA, UK.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Bromodomain-containing protein 4
A
127Homo sapiensMutation(s): 0 
Gene Names: BRD4 (HUNK1)
Find proteins for O60885 (Homo sapiens)
Go to Gene View: BRD4
Go to UniProtKB:  O60885
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1H3
Query on 1H3

Download SDF File 
Download CCD File 
A
3-(3,5-dimethyl-1,2-oxazol-4-yl)-5-[(S)-hydroxy(phenyl)methyl]phenol
C18 H17 N O3
FEQUIPXIENTMJN-SFHVURJKSA-N
 Ligand Interaction
EDO
Query on EDO

Download SDF File 
Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1H3Kd: 390 nM (99) BINDINGDB
1H3IC50: 382 nM (99) BINDINGDB
1H3IC50: 382 nM BINDINGMOAD
1H3IC50: 382 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.84 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.159 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 38.655α = 90.00
b = 42.981β = 90.00
c = 79.547γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALAdata scaling
CrystalCleardata collection
XDSdata reduction
PHASERphasing
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-02-13
    Type: Initial release
  • Version 1.1: 2013-05-29
    Type: Database references