Modular design of self-assembling peptide-based nanotubes

Burgess, N. C., Sharp, T. H., Thomas, F., Wood, C. W., Thomson, A. R., Zaccai, N. R., Brady, R. L., Serpell, L. C. and Woolfson, D. N. (2015) Modular design of self-assembling peptide-based nanotubes. Journal of the American Chemical Society, 137(33), pp. 10554-10562. (doi:10.1021/jacs.5b03973) (PMID:26219086)

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Abstract

An ability to design peptide-based nanotubes (PNTs) rationally with defined and mutable internal channels would advance understanding of peptide self-assembly, and present new biomaterials for nanotechnology and medicine. PNTs have been made from Fmoc dipeptides, cyclic peptides, and lock-washer helical bundles. Here we show that blunt-ended α-helical barrels, that is, preassembled bundles of α-helices with central channels, can be used as building blocks for PNTs. This approach is general and systematic, and uses a set of de novo helical bundles as standards. One of these bundles, a hexameric α-helical barrel, assembles into highly ordered PNTs, for which we have determined a structure by combining cryo-transmission electron microscopy, X-ray fiber diffraction, and model building. The structure reveals that the overall symmetry of the peptide module plays a critical role in ripening and ordering of the supramolecular assembly. PNTs based on pentameric, hexameric, and heptameric α-helical barrels sequester hydrophobic dye within their lumens.

Item Type:Articles
Additional Information:N.C.B. thanks the EPSRC-funded Bristol Centre for Functional Nanomaterials Centre for Doctoral Training for a postgraduate scholarship (EP/G036780/1). F.T. and D.N.W. thank the Leverhulme Trust for funding (RPG-2012-536). D.N.W. holds a Royal Society Wolfson Research Merit Award.
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Thomson, Dr Andrew
Authors: Burgess, N. C., Sharp, T. H., Thomas, F., Wood, C. W., Thomson, A. R., Zaccai, N. R., Brady, R. L., Serpell, L. C., and Woolfson, D. N.
College/School:College of Science and Engineering > School of Chemistry
Journal Name:Journal of the American Chemical Society
Publisher:American Chemical Society
ISSN:0002-7863
ISSN (Online):1520-5126
Published Online:28 July 2015

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