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| 001 | 872764 | ||
| 005 | 20210130004302.0 | ||
| 024 | 7 | _ | |a 10.1021/acs.jpcb.9b02338 |2 doi |
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| 100 | 1 | _ | |a Perez, Carlos |0 P:(DE-HGF)0 |b 0 |
| 245 | _ | _ | |a Mechanism of Fibril and Soluble Oligomer Formation in Amyloid Beta and Hen Egg White Lysozyme Proteins |
| 260 | _ | _ | |a Washington, DC |c 2019 |b Soc. |
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| 520 | _ | _ | |a Assembly and deposition of insoluble amyloid fibrils with a distinctive cross-β-sheet structure is the molecular hallmark of amyloidogenic diseases affecting the central nervous system as well as non-neuropathic amyloidosis. Amyloidogenic proteins form aggregates via kinetic pathways dictated by initial solution conditions. Often, early stage, cytotoxic, small globular amyloid oligomers (gOs) and curvilinear fibrils (CFs) precede the formation of late-stage rigid fibrils (RFs). Growing experimental evidence suggests that soluble gOs are off-pathway aggregates that do not directly convert into the final stage RFs. Yet, the kinetics of RFs aggregation under conditions that either promote or suppress the growth of gOs remain incompletely understood. Here we present a self-assembly model for amyloid fibril formation in the presence and absence of early stage off-pathway aggregates, driven by our experimental results on hen egg white lysozyme (HewL) and beta amyloid (Aβ) aggregation. The model reproduces a range of experimental observations including the sharp boundary in the protein concentration above which the self-assembly of gOs occurs. This is possible when both primary and secondary RFs nucleation rates are allowed to have a nonlinear dependence on initial protein concentration, hinting toward more complex prenucleation and RFs assembly scenarios. Moreover, analysis of RFs lag period in the presence and absence of gOs indicates that these off-pathway aggregates have an inhibitory effect on RFs nucleation. Finally, we incorporate the effect of an Aβ binding protein on the aggregation process in the model that allows us to identify the most suitable solution conditions for suppressing gOs and RFs formation. |
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| 700 | 1 | _ | |a Miti, Tatiana |0 P:(DE-HGF)0 |b 1 |
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| 700 | 1 | _ | |a Meisl, Georg |0 0000-0002-6562-7715 |b 3 |
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| 700 | 1 | _ | |a Ullah, Ghanim |0 0000-0002-3716-8742 |b 6 |e Corresponding author |
| 773 | _ | _ | |a 10.1021/acs.jpcb.9b02338 |g Vol. 123, no. 27, p. 5678 - 5689 |0 PERI:(DE-600)2006039-7 |n 27 |p 5678 - 5689 |t The journal of physical chemistry |v 123 |y 2019 |x 1520-5207 |
| 856 | 4 | _ | |y Published on 2019-06-18. Available in OpenAccess from 2020-06-18. |z StatID:(DE-HGF)0510 |u https://juser.fz-juelich.de/record/872764/files/Autorenmanusript%20Mechanism%20of%20fibril%20and%20soluble%20oligomer%20formation%20in%20amyloid%20%CE%B2%20and%20hen%20egg%20white%20lysozyme%20proteins.pdf |
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