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Updated: Aug 12, 2025
07:26
Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
Published on: November 21, 2013
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Charge guides pathway selection in β-sheet fibrillizing peptide co-assembly
Dillon T Seroski1, Xin Dong2, Kong M Wong3
1J. Crayton Pruitt Family Department of Biomedical Engineering, University of Florida, Gainesville, FL, 32611, USA.
Communications Chemistry
|January 27, 2023
Summary
Peptide charge governs the composition of co-assembled biomaterials. Higher charges promote faster co-assembly of complementary peptides, enabling predictable material properties.
Area of Science:
- Biomaterials Science
- Supramolecular Chemistry
- Biophysics
Background:
- Peptide co-assembly offers a route to novel biomaterials with tunable properties.
- Predicting the final composition of multicomponent peptide assemblies remains a challenge.
Purpose of the Study:
- To investigate the role of peptide charge in governing self- and co-assembly in binary CATCH peptide systems.
- To establish how charge influences the propensity for peptide association and the final composition of assembled structures.
Main Methods:
- Experimental techniques including solid-state NMR.
- Computational simulations.
- Synthesis and characterization of CATCH peptide variants with varying charges.
Main Results:
- Equimolar mixtures of CATCH peptides with charges ranging from 2+/2- to 6+/6- formed two-component β-sheets.
- Cationic peptides predominantly formed the final assemblies, with the cationic-to-anionic ratio decreasing as overall charge increased.
- Fibrillization rate accelerated with increasing peptide charge, and like-charged peptides repelled each other.
Conclusions:
- Peptide charge is a critical determinant of co-assembly behavior and final material composition.
- Understanding charge-driven interactions facilitates the rational design of peptide biomaterials with predictable properties.
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