Skip to main content
U.S. Department of Energy
Office of Scientific and Technical Information

Control of Peptide Amphiphile Supramolecular Nanostructures by Isosteric Replacements

Journal Article · · Biomacromolecules
 [1];  [2];  [3];  [3];  [4];  [5];  [6];  [2];  [7];  [8];  [7];  [2];  [3]
  1. Univ. of Nebraska Medical Center, Omaha, NE (United States); CBES
  2. Northwestern Univ., Evanston, IL (United States)
  3. Univ. of Nebraska Medical Center, Omaha, NE (United States)
  4. Univ. of Nebraska Medical Center, Omaha, NE (United States); Univ. of Nebraska, Omaha, NE (United States)
  5. Univ. Nacional de General San Martín, Buenos Aires (Argentina)
  6. Inst. de Investigaciones Fisicoquímicas Teóricas y Aplicadas (INIFTA), La Plata (Argentina)
  7. Ciudad Univ. (Argentina)
  8. Creighton Univ., Omaha, NE (United States)

Supramolecular nanostructures with tunable properties can have applications in medicine, pharmacy, and biotechnology. In this work, we show that the self-assembly behavior of peptide amphiphiles (PAs) can be effectively tuned by replacing the carboxylic acids exposed to the aqueous media with isosteres, functionalities that share key physical or chemical properties with another chemical group. Transmission electron microscopy, atomic force microscopy, and small-angle X-ray scattering studies indicated that the nanostructure’s morphologies are responsive to the ionization states of the side chains, which are related to their pKa values. Circular dichroism studies revealed the effect of the isosteres on the internal arrangement of the nanostructures. The interactions between diverse surfaces and the nanostructures and the effect of salt concentration and temperature were assessed to further understand the properties of these self-assembled systems. These results indicate that isosteric replacements allow the pH control of supramolecular morphology by manipulating the pKa of the charged groups located on the nanostructure’s surface. Theoretical studies were performed to understand the morphological transitions that the nanostructures underwent in response to pH changes, suggesting that the transitions result from alterations in the Coulomb forces between PA molecules. Furthermore, this work provides a strategy for designing biomaterials that can maintain or change behaviors based on the pH differences found within cells and tissues.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Center for Bio-Inspired Energy Science (CBES)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0000989
OSTI ID:
1865064
Alternate ID(s):
OSTI ID: 1820457
Journal Information:
Biomacromolecules, Journal Name: Biomacromolecules Journal Issue: 8 Vol. 22; ISSN 1525-7797
Publisher:
American Chemical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

References (49)

Chiral Nanoarchitectonics: Towards the Design, Self-Assembly, and Function of Nanoscale Chiral Twists and Helices journal September 2015
Developing Polyamine-Based Peptide Amphiphiles with Tunable Morphology and Physicochemical Properties journal May 2017
Self-assembling amphiphilic peptides: SELF-ASSEMBLING PEPTIDES journal April 2014
Catalytic Hydrolysis of Acylcyanamide Substrates by Carboxypeptidase A Defines the Stereochemistry of Carbonyl Hydration at the Enzyme Active Site journal December 1994
Self-assembly for the synthesis of functional biomaterials journal February 2013
Development of bioactive peptide amphiphiles for therapeutic cell delivery journal January 2010
Bone regeneration mediated by biomimetic mineralization of a nanofiber matrix journal August 2010
Electrostatic effects on nanofiber formation of self-assembling peptide amphiphiles journal April 2011
Structure Property Relationships of Carboxylic Acid Isosteres journal March 2016
Twisting of Charged Nanoribbons to Helicoids Driven by Electrostatics journal March 2020
Electrostatic Control of Polymorphism in Charged Amphiphile Assemblies journal February 2017
Self-Assembled Nanostructures of Peptide Amphiphiles: Charge Regulation by Size Regulation journal June 2019
Self-Repair of Structure and Bioactivity in a Supramolecular Nanostructure journal October 2018
Design, Synthesis, and Nanostructure-Dependent Antibacterial Activity of Cationic Peptide Amphiphiles journal December 2018
Probing Peptide Amphiphile Self-Assembly in Blood Serum journal November 2014
Supramolecular Nanotube Architectures Based on Amphiphilic Molecules journal April 2005
Pathway Selection in Peptide Amphiphile Assembly journal June 2014
pH and Amphiphilic Structure Direct Supramolecular Behavior in Biofunctional Assemblies journal October 2014
Tuning Supramolecular Rigidity of Peptide Fibers through Molecular Structure journal May 2010
Ligands for Brain Cholinergic Channel Receptors: Synthesis and in Vitro Characterization of Novel Isoxazoles and Isothiazoles as Bioisosteric Replacements for the Pyridine Ring in Nicotine journal December 1994
Mechanism of the pH-Controlled Self-Assembly of Nanofibers from Peptide Amphiphiles journal July 2014
The Effects of Chemical Substitution and Polymerization on the p K a Values of Sulfonic Acids journal September 2009
Temperature Dependence of Hydrogen Bonding in Supercritical Water journal January 1996
Morphology Control between Twisted Ribbon, Helical Ribbon, and Nanotube Self-Assemblies with His-Containing Helical Peptides in Response to pH Change journal January 2014
Heparin Binding Nanostructures to Promote Growth of Blood Vessels journal September 2006
De Novo Design of Bioactive Protein-Resembling Nanospheres via Dendrimer-Templated Peptide Amphiphile Assembly journal September 2011
Antitumor Activity of Peptide Amphiphile Nanofiber-Encapsulated Camptothecin journal October 2011
Coassembled Cytotoxic and Pegylated Peptide Amphiphiles Form Filamentous Nanostructures with Potent Antitumor Activity in Models of Breast Cancer journal August 2012
Energy landscapes and functions of supramolecular systems journal January 2016
NIH Image to ImageJ: 25 years of image analysis journal June 2012
Shape and fluctuations of frustrated self-assembled nano ribbons journal August 2019
Peptide based amphiphiles journal January 2004
Drug release from hydrazone-containing peptide amphiphiles journal January 2011
Effects of temperature, pH and counterions on the stability of peptide amphiphile nanofiber structures journal January 2016
Balancing the intermolecular forces in peptide amphiphiles for controlling self-assembly transitions journal January 2017
Interpolymer complexes of poly(sulfonic acid)s and poly(ethylene oxide): an unexpected association journal January 2019
Beyond molecules: Self-assembly of mesoscopic and macroscopic components journal April 2002
Supramolecular design of self-assembling nanofibers for cartilage regeneration journal February 2010
Estimated p K a values for the environmentally relevant C 1 through C 8 perfluorinated sulfonic acid isomers journal July 2016
Curvature Instability in a Chiral Amphiphile Self-Assembly journal June 2011
Universal Behavior in the Mesoscale Properties of Amyloid Fibrils journal December 2014
A new Guinier–Porod model journal May 2010
Self-Assembly and Mineralization of Peptide-Amphiphile Nanofibers journal November 2001
Functional Supramolecular Polymers journal February 2012
Formation of Highly Twisted Ribbons in a Carboxymethylcellulase Gene-Disrupted Strain of a Cellulose-Producing Bacterium journal December 2012
Hydrolysis of esters of oxy acids: p K a values for strong acids; Brønsted relationship for attack of water at methyl; free energies of hydrolysis of esters of oxy acids; and a linear relationship between free energy of hydrolysis and p K a holding over a range of 20 p K units journal September 1978
Induction of Cancer Cell Death by Self-assembling Nanostructures Incorporating a Cytotoxic Peptide journal March 2010
Chemical speciation of environmentally significant heavy metals with inorganic ligands. Part 1: The Hg2+– Cl–, OH–, CO32–, SO42–, and PO43– aqueous systems (IUPAC Technical Report) journal January 2005
Super Resolution Microscopy Reveals that Caveolin-1 Is Required for Spatial Organization of CRFB1 and Subsequent Antiviral Signaling in Zebrafish journal July 2013