4C66

Discovery of Epigenetic Regulator I-BET762: Lead Optimization to Afford a Clinical Candidate Inhibitor of the BET Bromodomains


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.220 

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Ligand Structure Quality Assessment 


This is version 1.1 of the entry. See complete history


Literature

Discovery of Epigenetic Regulator I-Bet762: Lead Optimization to Afford a Clinical Candidate Inhibitor of the Bet Bromodomains.

Mirguet, O.Gosmini, R.Toum, J.Clement, C.Barnathan, M.Brusq, J.Mordaunt, J.E.Grimes, R.Crowe, M.Pineau, O.Ajakane, M.Daugan, A.Jeffrey, P.Cutler, L.Haynes, A.Smithers, N.Chung, C.Bamborough, P.Uings, I.J.Lewis, T.Witherington, J.Parr, N.Prinjha, R.Nicodeme, E.

(2013) J Med Chem 56: 7501

  • DOI: 10.1021/jm401088k
  • Primary Citation of Related Structures:  
    4C66, 4C67

  • PubMed Abstract: 
  • The bromo and extra C-terminal domain (BET) family of bromodomains are involved in binding epigenetic marks on histone proteins, more specifically acetylated lysine residues. This paper describes the discovery and structure-activity relationships (SAR) of potent benzodiazepine inhibitors that disrupt the function of the BET family of bromodomains (BRD2, BRD3, and BRD4) ...

    The bromo and extra C-terminal domain (BET) family of bromodomains are involved in binding epigenetic marks on histone proteins, more specifically acetylated lysine residues. This paper describes the discovery and structure-activity relationships (SAR) of potent benzodiazepine inhibitors that disrupt the function of the BET family of bromodomains (BRD2, BRD3, and BRD4). This work has yielded a potent, selective compound I-BET762 that is now under evaluation in a phase I/II clinical trial for nuclear protein in testis (NUT) midline carcinoma and other cancers.


    Organizational Affiliation

    Centre de Recherches François Hyafil, GlaxoSmithKline R&D , 25 Avenue du Québec, 91140 Villebon-sur-Yvette, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
BROMODOMAIN-CONTAINING PROTEIN 4A126Homo 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
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
H4C (Subject of Investigation/LOI)
Query on H4C

Download Ideal Coordinates CCD File 
B [auth A]4-(2-chlorophenyl)-2-ethyl-9-methyl-6,8-dihydrothieno[3,2-f][1,2,4]triazolo[4,3-a][1,4]diazepin-10-ium
C17 H16 Cl N4 S
VMZUTJCNQWMAGF-UHFFFAOYSA-O
 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
H4C PDBBind:  4C66 IC50: 7.94e+4 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.87 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.217 
  • R-Value Observed: 0.220 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 35.464α = 90
b = 44.664β = 90
c = 78.664γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
SCALAdata scaling

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

  • Deposited Date: 2013-09-17 
  • Released Date: 2013-10-02 
  • Deposition Author(s): Chung, C., Mirguet, O.

Revision History  (Full details and data files)

  • Version 1.0: 2013-10-02
    Type: Initial release
  • Version 1.1: 2013-10-30
    Changes: Database references