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Dissecting Electrostatic Contributions to Folding and Self-Assembly Using Designed Multicomponent Peptide Systems.

Avanish S Parmar¹, Jose K James², Daniel R Grisham²

¹Department of Physics, Indian Institute of Technology (Banaras Hindu University) , Varanasi 221005, Uttar Pradesh, India.

Journal of the American Chemical Society

|March 12, 2016

Summary

This summary is machine-generated.

Arginine-containing collagen mimetic peptides (CMPs) rapidly assemble into fibers and sheets. This arginine-driven supramolecular assembly is key for biomolecular design and understanding self-assembly processes.

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Area of Science:

Biomaterials Science
Supramolecular Chemistry
Peptide Self-Assembly

Background:

Collagen mimetic peptides (CMPs) are designed to mimic collagen's triple-helix structure.
Understanding the factors governing CMP self-assembly is crucial for biomaterial development.
Previous studies show diverse morphologies in CMP assemblies.

Purpose of the Study:

To investigate the formation of peptide fibers and sheets from two distinct collagen mimetic peptides (CMPs).
To decouple the roles of amino acid sequences in peptide folding versus higher-order assembly.
To determine the specific contributions of arginine and lysine to CMP supramolecular assembly.

Main Methods:

Synthesized and characterized two-component collagen mimetic peptide systems.
Investigated triple-helix folding propensity of arginine- and lysine-containing CMPs.
Analyzed supramolecular assembly kinetics and morphology in different CMP combinations.

Main Results:

Both arginine and lysine containing CMPs favored triple-helix folding.
Only arginine-containing CMPs promoted rapid supramolecular assembly across three distinct systems.
Arginine's guanidyl group facilitates both intra- and intermolecular contacts, driving assembly.

Conclusions:

Arginine is a key residue for promoting rapid supramolecular assembly in CMPs.
The findings provide general principles for modeling and designing peptide-based biomaterials.
This work connects CMP self-assembly to broader biomolecular interaction phenomena.