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  • Title: Influence of salt on the self-assembly of two model amyloid heptapeptides.
    Author: Castelletto V, Hamley IW, Cenker C, Olsson U.
    Journal: J Phys Chem B; 2010 Jun 17; 114(23):8002-8. PubMed ID: 20496898.
    Abstract:
    We study the effects of NaCl on the self-assembly of AAKLVFF and betaAbetaAKLVFF in solution. Both AAKLVFF and betaAbetaAKLVFF self-assemble into twisted fibers in aqueous solution. The addition of NaCl to aqueous solutions of AAKLVFF produces large crystal-like nanotapes which eventually precipitate. In contrast, highly twisted fibrils were observed for betaAbetaAKLVFF solutions at low salt concentration, while a coexistence of highly twisted fibers and nanotubes was observed for betaAbetaAKLVFF at high salt concentration. The self-assembled structures observed for betaAbetaAKLVFF in NaCl solutions were ascribed to the progressive screening of the betaAbetaAKLVFF surface charge caused by the addition of salt.
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