Issue 20, 2013

Coiled coil peptide-functionalized surfaces for reversible molecular binding

Abstract

We studied the conformational and self-assembly properties of de novo peptides derived from the structure of the yeast transcriptional activator GCN4 in solution and on surfaces. We showed how the pH and the polarity of the solvent directed peptide conformation and assembly. The peptides self-assembled into a coiled coil structure below pH 5 whereas they disassembled above pH 7. The presence of acetonitrile in the peptide solution influenced the peptide's ability to assemble into a coiled coil structure while retaining its alpha-helix conformation. We used these properties to control the peptide packing density on gold surfaces and demonstrated that such peptide-engineered surfaces could be used for reversible molecular binding by utilising functionalised gold nanoparticles.

Graphical abstract: Coiled coil peptide-functionalized surfaces for reversible molecular binding

Article information

Article type
Paper
Submitted
05 Feb 2013
Accepted
22 Mar 2013
First published
16 Apr 2013

Soft Matter, 2013,9, 5119-5124

Coiled coil peptide-functionalized surfaces for reversible molecular binding

C. Minelli, J. X. Liew, M. Muthu and H. Andresen, Soft Matter, 2013, 9, 5119 DOI: 10.1039/C3SM50379H

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