Abstract
Gonadotropin-releasing hormone (GnRH) is a short human neuropeptide involved in the regulation of sex hormones. We report that GnRH self-assembles into reversible β-sheet-based nanofibrils, with pH-dependent kinetics. At high concentrations, these nanostructures form arrays arranged in liquid crystalline hexagonal phases. Histidine deprotonation with increasing pH can mediate the formation of β-sheet-based precipitates. Our results are relevant to functional amyloids in general, to the intracellular storage process of GnRH within secretory granules, and to peptide hormone drug delivery.
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