Single-nanometer changes in nanopore geometry influence curvature, local properties, and protein localization in membrane simulations
File(s)2019-Belessiotis-Nanoletters-accepted.pdf (4.21 MB)
Accepted version
Author(s)
Belessiotis-Richards, A
Higgins, SG
Butterworth, B
Stevens, MM
Alexander-Katz, A
Type
Journal Article
Abstract
Nanoporous surfaces are used in many applications in intracellular sensing and drug delivery. However, the effects of such nanostructures on cell membrane properties are still far from understood. Here, we use coarse-grained molecular dynamics simulations to show that nanoporous substrates can stimulate membrane-curvature effects and that this curvature-sensing effect is much more sensitive than previously thought. We define a series of design parameters for inducing a nanoscale membrane curvature and show that nanopore taper plays a key role in membrane deformation, elucidating a previously unexplored fabrication parameter applicable to many nanostructured biomaterials. We report significant changes in the membrane area per lipid and thickness at regions of curvature. Finally, we demonstrate that regions of the nanopore-induced membrane curvature act as local hotspots for an increased bioactivity. We show spontaneous binding and localization of the epsin N-terminal homology (ENTH) domain to the regions of curvature. Understanding this interplay between the membrane curvature and nanoporosity at the biointerface helps both explain recent biological results and suggests a pathway for developing the next generation of cell-active substrates.
Date Issued
2019-07-10
Online Publication Date
2020-06-21T06:00:21Z
Date Acceptance
2019-06-01
ISSN
1530-6984
Publisher
American Chemical Society
Start Page
4770
End Page
4778
Journal / Book Title
Nano Letters
Volume
19
Issue
7
Copyright Statement
© 2019 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/acs.nanolett.9b01990.
Sponsor
Engineering and Physical Sciences Research Council
Engineering and Physical Sciences Research Council
Identifier
https://www.ncbi.nlm.nih.gov/pubmed/31241342
Grant Number
EP/L015277/1
EP/L015277/1
Subjects
Science & Technology
Physical Sciences
Technology
Chemistry, Multidisciplinary
Chemistry, Physical
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Physics, Applied
Physics, Condensed Matter
Chemistry
Science & Technology - Other Topics
Materials Science
Physics
Molecular dynamics
bionanointerface
nanoporosity
membrane curvature
cell membrane
coarse-grained modeling
BILAYER THICKNESS
DOMAIN-BINDING
FORCE-FIELD
SILICON
VIRUS
EPSIN
AGGREGATION
NANONEEDLES
TOPOGRAPHY
DYNAMICS
Molecular dynamics
bionanointerface
cell membrane
coarse-grained modeling
membrane curvature
nanoporosity
Molecular dynamics
bionanointerface
cell membrane
coarse-grained modeling
membrane curvature
nanoporosity
Nanoscience & Nanotechnology
Publication Status
Published
Country
United States
Date Publish Online
2019-06-21