Molecular Design in l-Glutamic Acid-Based Peptide Assembly Dynamics Driven by Carbodiimide-Fueled Reaction Cycle

Area of Science:

• Chemical Engineering
• Materials Science
• Biotechnology

Background:

• Molecular self-assembly utilizes noncovalent interactions to build complex structures.
• Synthetic fuel-driven systems offer a platform to mimic biological processes.
• The influence of hydrophobic groups, like alkyl chains, on peptide assembly requires further investigation.

Purpose of the Study:

• To investigate how varying alkyl chain lengths affect the dynamic assembly of short, fuel-driven peptides.
• To understand the role of hydrophobic interactions in peptide self-assembly and aggregate formation.
• To explore rational peptide design for controlling nanostructure properties.

Main Methods:

• Synthesis of Z-capped peptides (C3 and C6) with varying C-terminal alkylamide chain lengths.
• Utilizing a chemically fueled reaction cycle to induce self-assembly and intramolecular anhydride formation.
• Observing and analyzing the formation of metastable aggregates and their dynamic behavior.

Main Results:

• Alkyl chain length was found to be a critical factor in the dynamic assembly of the studied peptides.
• Shorter alkyl chains led to highly dynamic peptide assemblies.
• Longer alkyl chains resulted in delayed structural dissolution of peptide aggregates.

Conclusions:

• Rational peptide design, specifically altering alkyl chain length, enables precise control over self-assembly dynamics.
• Understanding these structure-property relationships is key for designing advanced peptide-based nanomaterials.
• The findings contribute to the development of tunable synthetic systems for various applications.