Keywords: Amyloid Beta Protein, Amyloid Beta Protein (17 42), Amyloid Beta-Protein (17-42), Drug Derivative, Peptide Fragment, Trehalose, Article, Chemical Phenomena, Chemistry, Drug Antagonism, Drug Design, Human, Molecular Dynamics, Protein Multimerization, Protein Secondary Structure, Protein Stability, Amyloid Beta-Peptides, Hydrophobic And Hydrophilic Interactions, Molecular Dynamics Simulation, Protein Structure, Inhibitors, Analogs,
Affiliations: *** IBB - CNR ***
National Research Council, Institute of Biostructures and Bioimaging, 80138 Naples, Italy
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In silico investigation and targeting of amyloid beta oligomers of different size
Aggregation of amyloid (A) peptides into fibrils has been implicated in the pathogenesis of Alzheimer's disease (AD). As a result, in recent years, substantial efforts have been expended in the study of the mechanism of aggregation of the A peptide as well as of its inhibition by potential drug molecules. In this context, we have built a model of the A (17-42) deca-oligomer using the solid-state NMR (ssNMR) structure of the A (17-42) penta-oligomer as a reference. Both the penta- and deca-oligomer systems have been studied by all-atom molecular dynamics (MD) simulations and used as target systems for the investigation of the mechanism of action of a trehalose-derived A aggregation inhibitor. In the deca-oligomer all the main structural features of the putative fibrillar state are retained. Moreover, the simulations reveal a remarkable gain in stability as the oligomer grows. MD studies of the inhibitor in complex with the penta- and deca-oligomers indicate a significant destabilization of the structure beyond the hampering of the addition of successive A peptides at the ends of the fibril due to the presence of the inhibitor molecule. Our work provides an easy and effective approach which could be useful for the in silico development of potential drug molecules acting at different stages of the progression of A -related diseases. 2013 The Royal Society of Chemistry
In silico investigation and targeting of amyloid beta oligomers of different size
No results.
In silico investigation and targeting of amyloid beta oligomers of different size