ISDA

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

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Macromolecular Entities

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.

Bennett, M.J, Wu, Y, Boloor, A, Matuszkiewicz, J, O'Connell, S.M, Shi, L, Stansfield, R.K, Del Rosario, J.R, Veal, J.M, Hosfield, D.J, Xu, J, Kaldor, S.W, Stafford, J.A, Betancort, J.M.Show

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.

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Primary Citation of related structures