Abstract
Conformational conversion of the normal cellular prion protein, PrPC, into the misfolded isoform, PrPSc, is considered to be a central event in the development of fatal neurodegenerative diseases. Stabilization of prion protein at the normal cellular form (PrPC) with small molecules is a rational and efficient strategy for treatment of prion related diseases. However, few compounds have been identified as potent prion inhibitors by binding to the normal conformation of prion. In this work, to rational screening of inhibitors capable of stabilizing cellular form of prion protein, multiple approaches combining docking-based virtual screening, steady-state fluorescence quenching, surface plasmon resonance and thioflavin T fluorescence assay were used to discover new compounds interrupting PrPC to PrPSc conversion. Compound 3253-0207 that can bind to PrPC with micromolar affinity and inhibit prion fibrillation was identified from small molecule databases. Molecular dynamics simulation indicated that compound 3253-0207 can bind to the hotspot residues in the binding pocket composed by β1, β2 and α2, which are significant structure moieties in conversion from PrPC to PrPSc.
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This work was supported by the National Nature Science Foundation of China (Grant No. 21675070) and the Fundamental Research Funds for the Central Universities (Grant No. lzujbky-2016-146).
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Li, L., Wei, W., Jia, WJ. et al. Discovery of small molecules binding to the normal conformation of prion by combining virtual screening and multiple biological activity evaluation methods. J Comput Aided Mol Des 31, 1053–1062 (2017). https://doi.org/10.1007/s10822-017-0086-6
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DOI: https://doi.org/10.1007/s10822-017-0086-6