ISDA

Deposition Date 2013-01-31

Release Date 2013-02-13

Last Version Date 2023-09-20

Entry Detail

PDB ID:

4J0R

Keywords:

SIGNALING PROTEIN

Title:

Crystal Structure of the first bromodomain of human BRD4 in complex with a 3,5-dimethylisoxazol ligand

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.72 Å

R-Value Free:

0.22

R-Value Work:

0.15

R-Value Observed:

0.15

Space Group:

P 21 21 21

Download 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
Chain Length:127
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:O60885 Pfam ID:PF00439

Ligand Molecules

1H2

EDO

IOD

Primary Citation

Optimization of 3,5-dimethylisoxazole derivatives as potent bromodomain ligands.

Hewings, D.S, Fedorov, O, Filippakopoulos, P, Martin, S, Picaud, S, Tumber, A, Wells, C, Olcina, M.M, Freeman, K, Gill, A, Ritchie, A.J, Sheppard, D.W, Russell, A.J, Hammond, E.M, Knapp, S, Brennan, P.E, Conway, S.J.Show

J.Med.Chem. 56 3217 3227 (2013)

PMID: 23517011 DOI: 10.1021/jm301588r

Abstact

The bromodomain protein module, which binds to acetylated lysine, is emerging as an important epigenetic therapeutic target. We report the structure-guided optimization of 3,5-dimethylisoxazole derivatives to develop potent inhibitors of the BET (bromodomain and extra terminal domain) bromodomain family with good ligand efficiency. X-ray crystal structures of the most potent compounds reveal key interactions required for high affinity at BRD4(1). Cellular studies demonstrate that the phenol and acetate derivatives of the lead compounds showed strong antiproliferative effects on MV4;11 acute myeloid leukemia cells, as shown for other BET bromodomain inhibitors and genetic BRD4 knockdown, whereas the reported compounds showed no general cytotoxicity in other cancer cell lines tested.

Legend

Protein

Chemical

Disease

Primary Citation of related structures