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Demixing of water and ethanol causes conformational redistribution and gelation of the cationic GAG tripeptide
Journal article

Demixing of water and ethanol causes conformational redistribution and gelation of the cationic GAG tripeptide

Bridget Milorey, Stefanie Farrell, Siobhan E Toal and Reinhard Schweitzer-Stenner
Chemical communications (Cambridge, England), v 51(92), pp 16498-16501
28 Nov 2015
PMID: 26414527

Abstract

Ethanol - chemistry Gels Molecular Conformation Peptides - chemistry Spectrometry, Fluorescence Water - chemistry
The cationic tripeptide GAG undergoes three conformational changes in binary mixtures of water and ethanol. At 17 mol% of ethanol conformational sampling is shifted from pPII towards β-strands. A more pronounced shift in the same direction occurs at 40 mol%. At ca. 55 mol% of ethanol and above a peptide concentration of ca. 0.2 M the ternary peptide-water-ethanol mixture forms a hydrogel which is comprised of unusually large crystalline like non-β sheet fibrils forming a sample spanning matrix.

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Collaboration types
Domestic collaboration
Web of Science research areas
Chemistry, Multidisciplinary
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