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Title: Super-resolution microscopy reveals structural diversity in molecular exchange among peptide amphiphile nanofibres

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms11561· OSTI ID:1261783
 [1];  [2]; ORCiD logo [3];  [4];  [2];  [4]
  1. Northwestern Univ., Evanston, IL (United States); Eindhoven Univ. of Technology, Eindhoven (The Netherlands); King's College London, London (United Kingdom)
  2. Eindhoven Univ. of Technology, Eindhoven (The Netherlands)
  3. Eindhoven Univ. of Technology, Eindhoven (The Netherlands); Institute for Bioengineering of Catalonia (IBEC), Barcelona (Spain)
  4. Northwestern Univ., Evanston, IL (United States)

The dynamic behaviour of supramolecular systems is an important dimension of their potential functions. Here, we report on the use of stochastic optical reconstruction microscopy to study the molecular exchange of peptide amphiphile nanofibres, supramolecular systems known to have important biomedical functions. Solutions of nanofibres labelled with different dyes (Cy3 and Cy5) were mixed, and the distribution of dyes inserting into initially single-colour nanofibres was quantified using correlative image analysis. Our observations are consistent with an exchange mechanism involving monomers or small clusters of molecules inserting randomly into a fibre. Different exchange rates are observed within the same fibre, suggesting that local cohesive structures exist on the basis of beta-sheet discontinuous domains. The results reported here show that peptide amphiphile supramolecular systems can be dynamic and that their intermolecular interactions affect exchange patterns. Lastly, this information can be used to generate useful aggregate morphologies for improved biomedical function.

Research Organization:
Northwestern Univ., Evanston, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Dutch Ministry of Education, Culture and Science (Gravity program); European Research Council (ERC); Marie Curie FP7-PEOPLE-IOF program
Grant/Contract Number:
FG02-00ER45810
OSTI ID:
1261783
Alternate ID(s):
OSTI ID: 1820968
Journal Information:
Nature Communications, Vol. 7, Issue 1; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 106 works
Citation information provided by
Web of Science

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Into the Dynamics of a Supramolecular Polymer at Submolecular Resolution journal July 2017
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Quantification of functional crosslinker reaction kinetics via super-resolution microscopy of swollen microgels journal January 2019
The Power of Confocal Laser Scanning Microscopy in Supramolecular Chemistry: In situ Real‐time Imaging of Stimuli‐Responsive Multicomponent Supramolecular Hydrogels journal January 2020
A stochastic view on surface inhomogeneity of nanoparticles journal April 2019
Super-resolution Fluorescence Imaging for Materials Science journal August 2017
Quenched Stochastic Optical Reconstruction Microscopy (qSTORM) with Graphene Oxide journal November 2018
Quantifying Guest-Host Dynamics in Supramolecular Assemblies to Analyze Their Robustness journal December 2018
Polyprodrug Antimicrobials: Remarkable Membrane Damage and Concurrent Drug Release to Combat Antibiotic Resistance of Methicillin-Resistant Staphylococcus aureus journal August 2018
Tuning the matrix metalloproteinase-1 degradability of peptide amphiphile nanofibers through supramolecular engineering journal January 2019
Designing stable, hierarchical peptide fibers from block co-polypeptide sequences journal January 2019
Supramolecular materials based on AIE luminogens (AIEgens): construction and applications journal January 2020
Molecular modelling of supramolecular polymers journal January 2018
Functional Control of Peptide Amphiphile Assemblies via Modulation of Internal Cohesion and Surface Chemistry Switch journal August 2018
Supramolecular Copolymerization as a Strategy to Control the Stability of Self-Assembled Nanofibers journal May 2018
Supramolecular Copolymerization as a Strategy to Control the Stability of Self-Assembled Nanofibers journal May 2018
Controllable hierarchical self-assembly of porphyrin-derived supra-amphiphiles journal March 2019
Polyprodrug Antimicrobials: Remarkable Membrane Damage and Concurrent Drug Release to Combat Antibiotic Resistance of Methicillin-Resistant Staphylococcus aureus journal August 2019
Supramolecular Assembly of Peptide Amphiphiles journal September 2017
Painting Supramolecular Polymers in Organic Solvents by Super-resolution Microscopy journal April 2018
Controlling protein activity by dynamic recruitment on a supramolecular polymer platform journal January 2018
Amyloid-like staining property of RADA16-I nanofibers and its potential application in detecting and imaging the nanomaterial journal April 2018