6CKR image
Deposition Date 2018-02-28
Release Date 2018-05-02
Last Version Date 2023-10-04
Entry Detail
PDB ID:
6CKR
Keywords:
GENE REGULATION/INHIBITOR
Title:
Crystal Structure of BRD4 with QC4956
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Escherichia coli K-12
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.62 Å
R-Value Free:
0.23
R-Value Work:
0.18
R-Value Observed:
0.18
Space Group:
P 1
6CKR validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:Bromodomain-containing protein 4
Gene (Uniprot):BRD4
Chain IDs:A, B
Chain Length:126
Number of Molecules:2
Biological Source:Homo sapiens
UniProt ID:O60885 Pfam ID:PF00439
Ligand Molecules
F5V
Primary Citation
Design, synthesis and biological evaluation of novel 4-phenylisoquinolinone BET bromodomain inhibitors.
Bioorg. Med. Chem. Lett. 28 1811 1816 (2018)
PMID: 29657099 DOI: 10.1016/j.bmcl.2018.04.016

Abstact

The bromodomain and extra-terminal (BET) family of epigenetic proteins has attracted considerable attention in drug discovery given its involvement in regulating gene transcription. Screening a focused small molecule library based on the bromodomain pharmacophore resulted in the identification of 2-methylisoquinoline-1-one as a novel BET bromodomain-binding motif. Structure guided SAR exploration resulted in >10,000-fold potency improvement for the BRD4-BD1 bromodomain. Lead compounds exhibited excellent potencies in both biochemical and cellular assays in MYC-dependent cell lines. Compound 36 demonstrated good physicochemical properties and promising exposure levels in exploratory PK studies.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
6CKR
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