skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Self-assembly of {alpha}-helical polypeptides driven by complex coacervation.

Journal Article · · Angewandte Chemie (International Edition)

Reported is the ability of alpha-helical polypeptides to self-assemble with oppositely-charged polypeptides to form liquid complexes while maintaining their alpha-helical secondary structure. Coupling the alpha-helical polypeptide to a neutral, hydrophilic polymer and subsequent complexation enables the formation of nanoscale coacervate-core micelles. While previous reports on polypeptide complexation demonstrated a critical dependence of the nature of the complex (liquid versus solid) on chirality, the alpha-helical structure of the positively charged polypeptide prevents the formation of beta-sheets, which would otherwise drive the assembly into a solid state, thereby, enabling coacervate formation between two chiral components. The higher charge density of the assembly, a result of the folding of the alpha-helical polypeptide, provides enhanced resistance to salts known to inhibit polypeptide complexation. The unique combination of properties of these materials can enhance the known potential of fluid polypeptide complexes for delivery of biologically relevant molecules.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division
DOE Contract Number:
AC02-06CH11357
OSTI ID:
1868955
Journal Information:
Angewandte Chemie (International Edition), Vol. 54, Issue 38
Country of Publication:
United States
Language:
English

References (50)

Thermodynamic Characterization of Polypeptide Complex Coacervation journal October 2012
Ideal Mixing in Polyelectrolyte Complexes and Multilayers:  Entropy Driven Assembly journal October 2006
Electrostatic Free Energy of Weakly Charged Macromolecules in Solution and Intermacromolecular Complexes Consisting of Oppositely Charged Polymers journal March 2004
Preparation of microcapsules by complex coacervation of gum Arabic and chitosan journal January 2014
Bio-inspired catechol chemistry: a new way to develop a re-moldable and injectable coacervate hydrogel journal January 2012
Salt-Induced Disintegration of Lysozyme-Containing Polyelectrolyte Complex Micelles journal August 2009
Complex Coacervation of Whey Proteins and Gum Arabic journal January 2003
Complex coacervation of poly(ethylene-imine)/polypeptide aqueous solutions: Thermodynamic and rheological characterization journal May 2013
Phase Behavior and Coacervation of Aqueous Poly(acrylic acid)−Poly(allylamine) Solutions journal March 2010
The Effect of Salt on the Complex Coacervation of Vinyl Polyelectrolytes journal June 2014
Phase behaviour and complex coacervation of aqueous polypeptide solutions journal January 2012
Ionic polypeptides with unusual helical stability journal February 2011
Interfacial Energy of Polypeptide Complex Coacervates Measured via Capillary Adhesion journal May 2012
Interfacial tension between a complex coacervate phase and its coexisting aqueous phase journal January 2010
Polyelectrolytes for cell encapsulation journal August 2005
Cement Proteins of the Tube-building Polychaete Phragmatopoma californica journal October 2005
The tube cement of Phragmatopoma californica: a solid foam journal December 2004
Complexation of Whey Proteins with Carrageenan journal May 2004
Tunable, High Modulus Hydrogels Driven by Ionic Coacervation journal April 2011
Effects of Polymer and Salt Concentration on the Structure and Properties of Triblock Copolymer Coacervate Hydrogels journal February 2013
Multiresponsive Reversible Gels Based on Charge-Driven Assembly journal December 2009
Multiresponsive Reversible Gels Based on Charge-Driven Assembly journal December 2009
Dual Stimuli-Responsive Poly( N -isopropylacrylamide)- b -poly( l -histidine) Chimeric Materials for the Controlled Delivery of Doxorubicin into Liver Carcinoma journal April 2013
Preparation and Characterization of Polyion Complex Micelles with a Novel Thermosensitive Poly(2-isopropyl-2-oxazoline) Shell via the Complexation of Oppositely Charged Block Ionomers journal January 2007
Block copolymer micelles for delivery of gene and related compounds journal February 2002
Inhibition of atherosclerosis-promoting microRNAs via targeted polyelectrolyte complex micelles journal January 2014
Protein Folding: A Perspective from Theory and Experiment journal April 1998
Proteinfaltung aus theoretischer und experimenteller Sicht journal April 1998
Helix propensities of the amino acids measured in alanine-based peptides without helix-stabilizing side-chain interactions journal May 1994
Chirality-selected phase behaviour in ionic polypeptide complexes journal January 2015
Light-Responsive Helical Polypeptides Capable of Reducing Toxicity and Unpacking DNA: Toward Nonviral Gene Delivery journal July 2013
Light‐Responsive Helical Polypeptides Capable of Reducing Toxicity and Unpacking DNA: Toward Nonviral Gene Delivery journal July 2013
Reactive and Bioactive Cationic α-Helical Polypeptide Template for Nonviral Gene Delivery journal December 2011
Reactive and Bioactive Cationic α-Helical Polypeptide Template for Nonviral Gene Delivery journal December 2011
The effect of side-chain functionality and hydrophobicity on the gene delivery capabilities of cationic helical polypeptides journal March 2014
Helical poly(arginine) mimics with superior cell-penetrating and molecular transporting properties journal January 2013
Rheological Properties of Mixtures of Oppositely Charged Polyelectrolytes. A Study of the Interactions between a Cationic Cellulose Ether and a Hydrophobically Modified Poly[sodium 2-(acrylamido)-2-methylpropanesulfonate] journal May 2002
Relaxation Dynamics at Different Time Scales in Electrostatic Complexes: Time-Salt Superposition journal November 2010
Ternary, Tunable Polyelectrolyte Complex Fluids Driven by Complex Coacervation journal April 2014
Phase separation in polyelectrolyte solutions. Theory of complex coacervation journal May 1957
Formation of Polyion Complex Micelles in an Aqueous Milieu from a Pair of Oppositely-Charged Block Copolymers with Poly(ethylene glycol) Segments journal July 1995
Soluble Stoichiometric Complexes from Poly( N -ethyl-4-vinylpyridinium) Cations and Poly(ethylene oxide)- block -polymethacrylate Anions journal January 1996
Water-Soluble Complexes Formed by Sodium Poly(4-styrenesulfonate) and a Poly(2-vinylpyridinium)- b lock -poly(ethyleneoxide) Copolymer journal November 2000
Irena : tool suite for modeling and analysis of small-angle scattering journal February 2009
Effect of Charged Segment Length on Physicochemical Properties of Core−Shell Type Polyion Complex Micelles from Block Ionomers journal July 2003
Complex coacervate core micelles journal March 2009
Colloidal Stability of Aqueous Dispersions of Block Ionomer Complexes:  Effects of Temperature and Salt journal February 2004
Preparation and Characterization of Polyion Complex Micelles with Phosphobetaine Shells journal July 2013
Protein Encapsulation via Polypeptide Complex Coacervation journal October 2014
Progress of drug-loaded polymeric micelles into clinical studies journal September 2014

Similar Records

A molecular view of the role of chirality in charge-driven polypeptide complexation
Journal Article · Thu Jan 01 00:00:00 EST 2015 · Soft Matter · OSTI ID:1868955

Chirality-selected phase behaviour in ionic polypeptide complexes
Journal Article · Wed Jan 14 00:00:00 EST 2015 · Nature Communications · OSTI ID:1868955

Directing the phase behavior of polyelectrolyte complexes using chiral patterned peptides
Journal Article · Sat Oct 01 00:00:00 EDT 2016 · European Physical Journal. Special Topics · OSTI ID:1868955