6SB8

Crystal Structure of BRD4(1) bound to inhibitor BUX14 (7)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.169 

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

4-Acyl Pyrroles as Dual BET-BRD7/9 Bromodomain Inhibitors Address BETi Insensitive Human Cancer Cell Lines.

Hugle, M.Regenass, P.Warstat, R.Hau, M.Schmidtkunz, K.Lucas, X.Wohlwend, D.Einsle, O.Jung, M.Breit, B.Gunther, S.

(2020) J Med Chem 63: 15603-15620

  • DOI: https://doi.org/10.1021/acs.jmedchem.0c00478
  • Primary Citation of Related Structures:  
    6RWJ, 6S4B, 6S6K, 6SA2, 6SA3, 6SAH, 6SAJ, 6SB8

  • PubMed Abstract: 

    Various malignant human diseases show disturbed signaling pathways due to increased activity of proteins within the epigenetic machinery. Recently, various novel inhibitors for epigenetic regulation have been introduced which promise a great therapeutic benefit. Inhibitors for the bromo- and extra-terminal domain (BET) family were of particular interest after inhibitors had shown a strong antiproliferative effect. More recently, the focus has increasingly shifted to bromodomains (BDs) outside the BET family. Based on previously developed inhibitors, we have optimized a small series of 4-acyl pyrroles, which we further analyzed by ITC, X-ray crystallography, selectivity studies, the NCI60 cell-panel, and GI 50 determinations for several cancer cell lines. The inhibitors address both, BET and BRD7/9 BDs, with very high affinity and show a strong antiproliferative effect on various cancer cell lines that could not be observed for BD family selective inhibitors. Furthermore, a synergistic effect on breast cancer (MCF-7) and melanoma (SK-MEL-5) was proven.


  • Organizational Affiliation

    Institut für Pharmazeutische Wissenschaften, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 8, D-79104 Freiburg, Germany.


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
Expand
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
L45 (Subject of Investigation/LOI)
Query on L45

Download Ideal Coordinates CCD File 
B [auth A]~{N}-[5-(diethylsulfamoyl)-2-oxidanyl-phenyl]-3-methyl-4-oxidanylidene-5,6,7,8-tetrahydro-2~{H}-cyclohepta[c]pyrrole-1-carboxamide
C21 H27 N3 O5 S
RFIBRDFTONIULJ-UHFFFAOYSA-N
BU3
Query on BU3

Download Ideal Coordinates CCD File 
C [auth A](R,R)-2,3-BUTANEDIOL
C4 H10 O2
OWBTYPJTUOEWEK-QWWZWVQMSA-N
Binding Affinity Annotations 
IDSourceBinding Affinity
L45 BindingDB:  6SB8 Kd: min: 10, max: 170 (nM) from 3 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.207 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.169 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.781α = 90
b = 47.746β = 90
c = 57.217γ = 90
Software Package:
Software NamePurpose
XDSdata reduction
Aimlessdata scaling
PHASERphasing
PHENIXrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Released Date: 2020-12-09 
  • Deposition Author(s): Huegle, M.

Funding OrganizationLocationGrant Number
German Research FoundationGermany192904750

Revision History  (Full details and data files)

  • Version 1.0: 2020-12-09
    Type: Initial release
  • Version 1.1: 2020-12-16
    Changes: Database references
  • Version 1.2: 2021-01-06
    Changes: Database references
  • Version 1.3: 2024-01-24
    Changes: Data collection, Database references, Refinement description