Fragment-Based Hit Discovery and Structure-Based Optimization of Aminotriazoloquinazolines as Novel Hsp90 Inhibitors.
Casale, E., Amboldi, N., Brasca, M.G., Caronni, D., Colombo, N., Dalvit, C., Felder, E.R., Fogliatto, G., Galvani, A., Isacchi, A., Polucci, P., Riceputi, L., Sola, F., Visco, C., Zuccotto, F., Casuscelli, F.(2014) Bioorg Med Chem 22: 4135
- PubMed: 24980703 
- DOI: https://doi.org/10.1016/j.bmc.2014.05.056
- Primary Citation of Related Structures:  
4CWF, 4CWN, 4CWO, 4CWP, 4CWQ, 4CWR, 4CWS, 4CWT - PubMed Abstract: 
In the last decade the heat shock protein 90 (Hsp90) has emerged as a major therapeutic target and many efforts have been dedicated to the discovery of Hsp90 inhibitors as new potent anticancer agents. Here we report the identification of a novel class of Hsp90 inhibitors by means of a biophysical FAXS-NMR based screening of a library of fragments. The use of X-ray structure information combined with modeling studies enabled the fragment evolution of the initial triazoloquinazoline hit to a class of compounds with nanomolar potency and drug-like properties suited for further lead optimization.
Organizational Affiliation: 
Oncology, Nerviano Medical Sciences, Viale Pasteur 10, 20014 Nerviano (MI), Italy. Electronic address: elena.casale@nervianoms.com.