Alzheimer hastalığındaki amyloid beta birikimi için hesaplamalı olarak peptid inhibitör tasarlanması

The most common form of dementia, Alzheimer?s disease, that is neurodegenerative and incurable, is associated with tight packaging of amyloid fibrils. This packaging is caused by the compatibility of the ridges and grooves on the amyloid surface that are composed of ß-sheets orientation. The major factor which creates compatibility between two amyloid surfaces is GxMxG motif. Therefore, this motif is an important target in designing inhibitors for amyloid fibrillization. In this study, particular peptides that bind Aß40 fibrils according to amino acids groups were modified, and a small peptide library was composed. The peptide sequences that bind the surface via GxMxG motif were identified with the docking program GOLD. The sequence that had the highest docking score and binds to around MET35 was selected. Finally, the binding free energies of modified and unmodified peptides were calculated with Steered Molecular Dynamics by using the Jarzynski?s Equality.