4QEU

Crystal structure of BRD2(BD2) mutant in free form

Summary for 4QEU

• Entry DOI: 10.2210/pdb4qeu/pdb
• Related: 4QEO 4QEP
• Descriptor: Bromodomain-containing protein 2, ACETATE ION, GLYCEROL, ... (4 entities in total)
• Functional Keywords: bromodomain-containing protein 2, kiaa9001, ring3, transcription regulation, transcription
• Biological source: Homo sapiens (human)
• Cellular location: Nucleus : P25440
• Total number of polymer chains: 1
• Total formula weight: 13484.47

Authors

Tallant, C.,Baud, M.,Lin-Shiao, E.,Chirgadze, D.Y.,Ciulli, A. (deposition date: 2014-05-19, release date: 2014-10-29, Last modification date: 2023-09-20)

Primary citation

Baud, M.G.,Lin-Shiao, E.,Cardote, T.,Tallant, C.,Pschibul, A.,Chan, K.H.,Zengerle, M.,Garcia, J.R.,Kwan, T.T.,Ferguson, F.M.,Ciulli, A.
Chemical biology. A bump-and-hole approach to engineer controlled selectivity of BET bromodomain chemical probes.
Science, 346:638-641, 2014

PubMed Abstract: Small molecules are useful tools for probing the biological function and therapeutic potential of individual proteins, but achieving selectivity is challenging when the target protein shares structural domains with other proteins. The Bromo and Extra-Terminal (BET) proteins have attracted interest because of their roles in transcriptional regulation, epigenetics, and cancer. The BET bromodomains (protein interaction modules that bind acetyl-lysine) have been targeted by potent small-molecule inhibitors, but these inhibitors lack selectivity for individual family members. We developed an ethyl derivative of an existing small-molecule inhibitor, I-BET/JQ1, and showed that it binds leucine/alanine mutant bromodomains with nanomolar affinity and achieves up to 540-fold selectivity relative to wild-type bromodomains. Cell culture studies showed that blockade of the first bromodomain alone is sufficient to displace a specific BET protein, Brd4, from chromatin. Expansion of this approach could help identify the individual roles of single BET proteins in human physiology and disease.

PubMed: 25323695
DOI: 10.1126/science.1249830

Experimental method

X-RAY DIFFRACTION (1.5 Å)