ISDA: 5H21

Deposition Date 2016-10-13

Release Date 2017-07-05

Last Version Date 2024-03-20

Entry Detail

PDB ID:

5H21

Keywords:

PEPTIDE BINDING PROTEIN/INHIBITOR

Title:

Trimethoxy-ring inhibitor in complex with the first bromodomain of BRD4

Biological Source:

Source Organism(s):

Homo sapiens (Taxon ID: 9606)

Expression System(s):

Escherichia coli bl21(de3)

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.59 Å

R-Value Free:

0.19

R-Value Work:

0.16

R-Value Observed:

0.16

Space Group:

P 21 21 21

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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:139
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:O60885 Pfam ID:PF00439

Ligand Molecules

RMR

Primary Citation

Discovery of novel trimethoxy-ring BRD4 bromodomain inhibitors: AlphaScreen assay, crystallography and cell-based assay.

Chen, Z, Zhang, H, Liu, S, Xie, Y, Jiang, H, Lu, W, Xu, H, Yue, L, Zhang, Y, Ding, H, Zheng, M, Yu, K, Chen, K, Jiang, H, Luo, C.Show

Medchemcomm 8 1322 1331 (2017)

PMID: 30108844 DOI: 10.1039/c7md00083a

Abstact

As a member of the bromodomain and extra terminal domain (BET) protein family, BRD4 is closely related to cancers and other diseases. Small-molecule BRD4 inhibitors have already demonstrated promising potential for the therapy of BRD4-related cancers. In this study, we report the discovery and evaluation of a novel category of BRD4 inhibitors, which share a trimethoxy ring and target the first bromodomain of the human BRD4 protein. The IC50 value of the most potent compound, DC-BD-03, is 2.01 μM. In addition, a high-resolution crystal structure of the compound DC-BD-29 with the first bromodomain of BRD4 was determined, which revealed the binding mode and facilitated further structure-based optimization. These compounds exhibited anti-proliferation activity, caused cell cycle arrest, and induced apoptosis in human leukemia MV4-11 cells. Thus, the results presented in this study indicated the potential of this series of compounds as drug candidates for the therapy of BRD4-related cancers.

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Protein

Chemical

Disease

Primary Citation of related structures

Abstact

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