Heath, GR (2014) Diffusion in low-dimensional lipid membranes. Nano letters, 14 (10). 5984 - 5988. ISSN 1530-6984
Abstract
The diffusion behavior of biological components in cellular membranes is vital to the function of cells. By collapsing the complexity of planar 2D membranes down to one dimension, fundamental investigations of bimolecular behavior become possible in one dimension. Here we develop lipid nanolithography methods to produce membranes, under fluid, with widths as low as 6 nm but extending to microns in length. We find reduced lipid mobility, as the width is reduced below 50 nm, suggesting different lipid packing in the vicinity of boundaries. The insertion of a membrane protein, M2, into these systems, allowed characterization of protein diffusion using high-speed AFM to demonstrate the first membrane protein 1D random walk. These quasi-1D lipid bilayers are ideal for testing and understanding fundamental concepts about the roles of dimensionality and size on physical properties of membranes from energy transfer to lipid packing.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2014 American Chemical Society. This is an open access article under the terms of the Creative Commons Attribution License CC-BY. |
Keywords: | Lipid membranes; high-speed AFM; nanolithography; molecular crowding; lipid diffusion |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Biological Sciences (Leeds) The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Physics and Astronomy (Leeds) > Molecular & Nanoscale Physics |
Depositing User: | Symplectic Publications |
Date Deposited: | 21 Oct 2015 09:15 |
Last Modified: | 17 Jan 2018 00:52 |
Published Version: | http://dx.doi.org/10.1021/nl503024v |
Status: | Published |
Publisher: | American Chemical Society |
Identification Number: | 10.1021/nl503024v |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:87255 |