Discrimination between Alpha-Synuclein Protein Variants with a Single Nanometer-Scale Pore
Résumé
Alpha-synuclein is one of several key factors in the regulation of nerve activity. It is striking that single- or multiple-point mutations in the 140-amino-acid-long protein can change its structure, which leads to the protein’s aggregation and fibril formation (which is associated with several neurodegenerative diseases, e.g., Parkinson’s disease). We recently demonstrated that a single nanometer-scale pore can identify proteins based on its ability to discriminate between protease-generated polypeptide fragments. We show here that a variation of this method can readily discriminate between the wild-type alpha synuclein, a known deleterious point mutation of the glutamic acid at position 46 replaced with a lysine (E46K), and post-translational modifications (i.e., tyrosine Y39 nitration and serine 129 phosphorylation).
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ACS Chemical Neuroscience proof (1).pdf (3.66 Mo)
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cn3c00164_si_001.pdf (2.03 Mo)
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