Download MendeleyIdentification of Thiourea-Based Inhibitors of the B-Cell Lymphoma 6 BTB Domain via NMR-Based Fragment Screening and Computer-Aided Drug Design.
Cheng, H., Linhares, B.M., Yu, W., Cardenas, M.G., Ai, Y., Jiang, W., Winkler, A., Cohen, S., Melnick, A., MacKerell Jr., A., Cierpicki, T., Xue, F.(2018) J Med Chem 61: 7573-7588
- PubMed: 29969259
- DOI: https://doi.org/10.1021/acs.jmedchem.8b00040
- Primary Citation of Related Structures:
6C3L, 6C3N, 6CQ1 - PubMed Abstract:
Protein-protein interactions (PPI) between the transcriptional repressor B-cell lymphoma 6 (BCL6) BTB domain (BCL6 BTB ) and its corepressors have emerged as a promising target for anticancer therapeutics. However, identification of potent, drug-like inhibitors of BCL6 BTB has remained challenging. Using NMR-based screening of a library of fragment-like small molecules, we have identified a thiourea compound (7CC5) that binds to BCL6 BTB . From this hit, the application of computer-aided drug design (CADD), medicinal chemistry, NMR spectroscopy, and X-ray crystallography has yielded an inhibitor, 15f, that demonstrated over 100-fold improved potency for BCL6 BTB . This gain in potency was achieved by a unique binding mode that mimics the binding mode of the corepressor SMRT in the aromatic and the HDCH sites. The structure-activity relationship based on these new inhibitors will have a significant impact on the rational design of novel BCL6 inhibitors, facilitating the identification of therapeutics for the treatment of BCL6-dependent tumors.
Organizational Affiliation:
Department of Pharmaceutical Sciences , University of Maryland School of Pharmacy , 20 Penn Street , Baltimore , Maryland 21201 , United States.
