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- W4324144472 abstract "Transmissive spongiform encephalopathies (TSE) are a group of neurodegenerative diseases caused by infectious protein particles, known as prions. Prions are formed from cellular prion proteins (PrP) and can be transmitted between different mammalian species. Subsequently, the host's PrPs are then converted to prions, followed by the onset of TSE. Interspecies prion infectivity is governed by the amino acid sequence differences of PrPs and prions' inability to replicate in a host is termed a species barrier. Here, we investigated the amino acid sequence determinants of species barrier between recombinant human (rHuPrP) and hamster (rShaPrP) prion protein amyloid fibrils. We discovered that a unidirectional species barrier between rShaPrP and rHuPrP amyloid fibrils exists. This barrier stems from the difference of amino acid sequences in the conserved β2-α2 loop region. Our results revealed that individual amino acids in the β2-α2 loop region are critical for overcoming the barrier between human and hamster prion protein amyloid fibrils in vitro. Furthermore, the barrier was only possible to observe through aggregation kinetics, as the secondary structure rHuPrP fibrils was not affected by the cross-seeding. Overall, we demonstrated the mechanistic pathway behind this interspecies barrier phenomenon, which increases our understanding of prion-related disease development." @default.
- W4324144472 created "2023-03-15" @default.
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- W4324144472 date "2023-05-01" @default.
- W4324144472 modified "2023-09-25" @default.
- W4324144472 title "The seeding barrier between human and Syrian hamster prion protein amyloid fibrils is determined by β2-α2 loop sequence elements" @default.
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- W4324144472 doi "https://doi.org/10.1016/j.ijbiomac.2023.124038" @default.
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