Structural transition in peptide nanotubes

Nadav Amdursky, Peter Beker, Itai Koren, Becky Bank-Srour, Elena Mishina, Sergey Semin, Theo Rasing, Yuri Rosenberg, Zahava Barkay, Ehud Gazit, Gil Rosenman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Phase transitions in organic and inorgnic materials are well-studied classical phenomena, where a change in the crystal space group symmetry induces a wide variation of physical properties, permitted by the crystalline symmetry in each phase. Here we observe a conformational induced transition in bioinspired peptide nanotubes (PNTs). We found that the PNTs change their original molecular assembly from a linear peptide conformation to a cyclic one, followed by a change of the nanocrystalline structure from a noncentrosymmetric hexagonal space group to a centrosymmetric orthorhombic space group. The observed transition is irreversible and induces a profound variation in the PNTs properties, from the microscopic to the macroscopic level. In this context, we follow the unique changes in the molecular, morphological, piezoelectric, second harmonic generation, and wettability properties of the PNTs.

Original languageEnglish
Pages (from-to)1349-1354
Number of pages6
JournalBiomacromolecules
Volume12
Issue number4
DOIs
StatePublished - 11 Apr 2011

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