4TQN

Crystal structure of the bromodomain of human CREBBP in complex with UL04

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.182 

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Literature

Discovery of CREBBP Bromodomain Inhibitors by High-Throughput Docking and Hit Optimization Guided by Molecular Dynamics.

Xu, M., Unzue, A., Dong, J., Spiliotopoulos, D., Nevado, C., Caflisch, A.

(2016) J Med Chem 59: 1340-1349

  • DOI: 10.1021/acs.jmedchem.5b00171
  • Primary Citation of Related Structures:  
    4TQN

  • PubMed Abstract: 

    • We have identified two chemotypes of CREBBP bromodomain ligands by fragment-based high-throughput docking. Only 17 molecules from the original library of two-million compounds were tested in vitro. Optimization of the two low-micromolar hits, the 4-acylpyrrole 1 and acylbenzene 9, was driven by molecular dynamics results which suggested improvement of the polar interactions with the Arg1173 side chain at the rim of the binding site ...

    We have identified two chemotypes of CREBBP bromodomain ligands by fragment-based high-throughput docking. Only 17 molecules from the original library of two-million compounds were tested in vitro. Optimization of the two low-micromolar hits, the 4-acylpyrrole 1 and acylbenzene 9, was driven by molecular dynamics results which suggested improvement of the polar interactions with the Arg1173 side chain at the rim of the binding site. The synthesis of only two derivatives of 1 yielded the 4-acylpyrrole 6 which shows a single-digit micromolar affinity for the CREBBP bromodomain and a ligand efficiency of 0.34 kcal/mol per non-hydrogen atom. Optimization of the acylbenzene hit 9 resulted in a series of derivatives with nanomolar potencies, good ligand efficiency and selectivity (see Unzue, A.; Xu, M.; Dong, J.; Wiedmer, L.; Spiliotopoulos, D.; Caflisch, A.; Nevado, C.Fragment-Based Design of Selective Nanomolar Ligands of the CREBBP Bromodomain. J. Med. Chem. 2015, DOI: 10.1021/acs.jmedchem.5b00172). The in silico predicted binding mode of the acylbenzene derivative 10 was validated by solving the structure of the complex with the CREBBP bromodomain.

    Organizational Affiliation: 

    Department of Biochemistry, University of Zürich , Winterthurerstrasse 190, CH-8057, Zürich, Switzerland.



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CREB-binding proteinA119Homo sapiensMutation(s): 0 
Gene Names: CREBBP, CBP
EC: 2.3.1.48 (PDB Primary Data), 2.3.1 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for Q92793 (Homo sapiens)
Explore Q92793 
Go to UniProtKB:  Q92793
PHAROS:  Q92793
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ92793
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
UL4
Query on UL4
Download Ideal Coordinates CCD File 
B [auth A]3-[(5-acetyl-2-ethoxyphenyl)carbamoyl]benzoic acid
C18 H17 N O5
GFOBMGVVDGTGAJ-UHFFFAOYSA-N		 Ligand Interaction
EDO
Query on EDO
Download Ideal Coordinates CCD File 
C [auth A],
D [auth A],
E [auth A]		1,2-ETHANEDIOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
UL4 BindingDB:  4TQN Kd: min: 670, max: 2000 (nM) from 3 assay(s)
IC50: 8700 (nM) from 1 assay(s)
Binding MOAD:  4TQN Kd: 770 (nM) from 1 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.199 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.182 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 24.938α = 90
b = 42.935β = 97.24
c = 51.983γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
XDSdata reduction
PDB_EXTRACTdata extraction
PHASERphasing
PHENIXrefinement
XSCALEdata reduction

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2014-06-11 
  • Released Date: 2015-06-24 
    • Deposition Author(s): Dong, J., Caflisch, A.

Revision History  (Full details and data files)

  • Version 1.0: 2015-06-24
    Type: Initial release
  • Version 1.1: 2015-07-15
    Changes: Database references
  • Version 1.2: 2016-03-09
    Changes: Database references