Abstract

Transitions in nanostructure driven by pH are observed for a self-assembling peptide amphiphile (PA) with a cationic pentapeptide headgroup. At pH 3, the PA forms flat tape-like structures, while at pH 4 the PA assembles into twisted right handed structures. These twisted structures transform again to flat tape-like structures at pH 7. In complete contrast, spherical micelles are observed at pH 2. These changes in response to pH may be relevant to biological and pharmaceutical applications of this PA in skincare.

Highlights

  • Transitions in nanostructure driven by pH are observed for a selfassembling peptide amphiphile (PA) with a cationic pentapeptide headgroup

  • Peptide amphiphiles (PAs) are remarkable molecules in which the biofunctionality of peptides is controlled by the amphiphilicity imparted by attachment of lipid chains

  • We investigate the in uence of pH on the self-assembly of the PA C16-KTTKS which has a pentapeptide headgroup based on a sequence from pro-collagen I

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Summary

Introduction

Transitions in nanostructure driven by pH are observed for a selfassembling peptide amphiphile (PA) with a cationic pentapeptide headgroup. We investigate the in uence of pH on the self-assembly of the PA C16-KTTKS which has a pentapeptide headgroup based on a sequence from pro-collagen I.

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