Journal
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
Volume 60, Issue -, Pages 479-489Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ejmech.2012.12.014
Keywords
Allosterism; Alzheimer; GSK-3 inhibition; Molecular dynamics; Drug design
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Funding
- Ministerio de Innovacion y Ciencia [SAF2011-27642, SAF2009-13015-C02-01]
- Generalitat de Catalunya [SGR2009-298]
- XRQTC
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Glycogen synthase kinase 3 beta (GSK-3 beta) is widely recognised as a relevant player in the pathogenesis of several highly prevalent disorders such as Alzheimer's disease, mood disorders, diabetes and cancer. Therefore, this enzyme constitutes a highly attractive therapeutic target for the development of selective inhibitors as new promising drugs for the treatment of these pathologies. We describe here the isolation and biochemical characterization of the marine natural sesquiterpene palinurin as a GSK-3 beta inhibitor. Experimental studies performed for characterizing the inhibitory mechanism indicate that GSK-3 beta inhibition by palinurin cannot be competed out by ATP nor peptide substrate. Molecular modelling techniques have enabled us to propose an unconventional binding mode to GSK-3 beta. Moreover, molecular dynamics simulations have identified an allosteric mechanism by which binding of palinurin leads to GSK-3 beta inhibition. The inhibitory activities determined for a series of structurally related analogues support the proposed binding mode of palinurin, which is the first compound described to target this allosteric site. The results offer new opportunities for designing and developing selective inhibitors with novel mechanisms of action. (C) 2012 Elsevier Masson SAS. All rights reserved.
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