ISDA: 6DL2

Deposition Date 2018-05-31

Release Date 2019-04-17

Last Version Date 2023-10-11

Entry Detail

PDB ID:

6DL2

Keywords:

TRANSCRIPTION

Title:

BRD4 bromodomain 1 in complex with HYB157

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.47 Å

R-Value Free:

0.21

R-Value Work:

0.19

R-Value Observed:

0.19

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:128
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:O60885 Pfam ID:PF00439

Ligand Molecules

EDO

GUJ

Primary Citation

Discovery of QCA570 as an Exceptionally Potent and Efficacious Proteolysis Targeting Chimera (PROTAC) Degrader of the Bromodomain and Extra-Terminal (BET) Proteins Capable of Inducing Complete and Durable Tumor Regression.

Qin, C, Hu, Y, Zhou, B, Fernandez-Salas, E, Yang, C.Y, Liu, L, McEachern, D, Przybranowski, S, Wang, M, Stuckey, J, Meagher, J, Bai, L, Chen, Z, Lin, M, Yang, J, Ziazadeh, D.N, Xu, F, Hu, J, Xiang, W, Huang, L, Li, S, Wen, B, Sun, D, Wang, S.Show

J. Med. Chem. 61 6685 6704 (2018)

PMID: 30019901 DOI: 10.1021/acs.jmedchem.8b00506

Abstact

Proteins of the bromodomain and extra-terminal (BET) family are epigenetics "readers" and promising therapeutic targets for cancer and other human diseases. We describe herein a structure-guided design of [1,4]oxazepines as a new class of BET inhibitors and our subsequent design, synthesis, and evaluation of proteolysis-targeting chimeric (PROTAC) small-molecule BET degraders. Our efforts have led to the discovery of extremely potent BET degraders, exemplified by QCA570, which effectively induces degradation of BET proteins and inhibits cell growth in human acute leukemia cell lines even at low picomolar concentrations. QCA570 achieves complete and durable tumor regression in leukemia xenograft models in mice at well-tolerated dose-schedules. QCA570 is the most potent and efficacious BET degrader reported to date.

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