Switchable electrostatic interactions between gold nanoparticles and coiled coil peptides direct colloid assembly

Sara C. Wagner; Meike Roskamp; Helmut Cölfen; Christoph Böttcher; Sabine Schlecht; Beate Koksch

doi:10.1039/B813429D

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Organic & Biomolecular Chemistry

Issue 1, 2009

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Switchable electrostatic interactions between gold nanoparticles and coiled coil peptides direct colloid assembly

Sara C. Wagner , Meike Roskamp , Helmut Cölfen , Christoph Böttcher , Sabine Schlecht and Beate Koksch

Org. Biomol. Chem., 2009, 7, 46-51

DOI: 10.1039/B813429D
Received 04 Aug 2008, Accepted 01 Oct 2008
First published on the web 17 Nov 2008

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Abstract
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The nanoparticle–peptide interaction described here is based on electrostatic forces and the pH value can act as a trigger to direct the organization of functionalized nanoparticles in a reversible and repeatable manner. The ability of the peptide to interact with the charged gold nanoparticles is directly related to its helical structure and was not found for a random coil peptide with the same net charge. Interestingly, the interaction with nanoparticles seems to induce a fibrillation of the coiled coil peptide.

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Sara C. Wagner
Meike Roskamp
Helmut Cölfen
Christoph Böttcher
Sabine Schlecht
Beate Koksch

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Organic & Biomolecular Chemistry

Switchable electrostatic interactions between gold nanoparticles and coiled coil peptides direct colloid assembly

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