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Title: Co-assembly of Peptide Amphiphiles and Lipids into Supramolecular Nanostructures Driven by Anion–π Interactions

Journal Article · · Journal of the American Chemical Society
DOI:https://doi.org/10.1021/jacs.7b02058· OSTI ID:1846932

Co-assembly of binary systems driven by specific non-covalent interactions can greatly expand the structural and functional space of supramolecular nanostructures. We report here on the self-assembly of peptide amphiphiles and fatty acids driven primarily by anion–π interactions. The peptide sequences investigated were functionalized with a perfluorinated phenylalanine residue to promote anion–π interactions with carboxylate headgroups in fatty acids. These interactions were verified here by NMR and circular dichroism experiments as well as investigated using atomistic simulations. Positioning the aromatic units close to the N-terminus of the peptide backbone near the hydrophobic core of cylindrical nanofibers leads to strong anion–π interactions between both components. With a low content of dodecanoic acid in this position, the cylindrical morphology is preserved. However, as the aromatic units are moved along the peptide backbone away from the hydrophobic core, the interactions with dodecanoic acid transform the cylindrical supramolecular morphology into ribbon-like structures. Increasing the ratio of dodecanoic acid to PA leads to either the formation of large vesicles in the binary systems where the anion–π interactions are strong, or a heterogeneous mixture of assemblies when the peptide amphiphiles associate weakly with dodecanoic acid. Furthermore, our findings reveal how co-assembly involving designed specific interactions can drastically change supramolecular morphology and even cross from nano to micro scales.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Bio-Inspired Energy Science (CBES); Northwestern Univ., Evanston, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
FG02-08ER46539; FG02-00ER45810; AC02-06CH11357
OSTI ID:
1846932
Alternate ID(s):
OSTI ID: 1821221
Journal Information:
Journal of the American Chemical Society, Vol. 139, Issue 23; ISSN 0002-7863
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 65 works
Citation information provided by
Web of Science

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Cited By (15)

Selective Coassembly of Aromatic Amino Acids to Fabricate Hydrogels with Light Irradiation-Induced Emission for Fluorescent Imprint journal December 2017
Anion-π Catalysis of Diels-Alder Reactions journal September 2017
Remote Control of Anion-π Catalysis on Fullerene-Centered Catalytic Triads journal May 2018
Selection of Secondary Structures of Heterotypic Supramolecular Peptide Assemblies by an Enzymatic Reaction journal September 2018
Nano Trek Beyond: Driving Nanocars/Molecular Machines at Interfaces journal April 2018
Organic Templates for Inorganic Nanocrystal Growth journal January 2019
Anion-dependent thermo-responsive supramolecular superstructures of Cu( ii ) macrocycles journal January 2018
A counter ion triggers stabilization of two geometrical isomers of a Ni( ii ) dication diradical porphyrin dimer: the role of anion–π interactions journal January 2019
Expanding the structural diversity of peptide assemblies by coassembling dipeptides with diphenylalanine journal January 2020
Designing stable, hierarchical peptide fibers from block co-polypeptide sequences journal January 2019
Computational prediction of tripeptide-dipeptide co-assembly text January 2018
Selection of Secondary Structures of Heterotypic Supramolecular Peptide Assemblies by an Enzymatic Reaction journal August 2018
Anion-π Catalysis of Diels-Alder Reactions journal September 2017
Remote Control of Anion-π Catalysis on Fullerene-Centered Catalytic Triads journal May 2018
Computational prediction of tripeptide-dipeptide co-assembly journal September 2018

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