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Formation of Ordered Biomolecular Structures by the Self-assembly of Short Peptides
Published on: November 21, 2013
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Computationally designed peptides for self-assembly of nanostructured lattices
Huixi Violet Zhang1, Frank Polzer2, Michael J Haider2
1Department of Chemistry, University of Pennsylvania, Philadelphia, PA 19104, USA.
Science Advances
|September 15, 2016
Summary
Computational design of peptides enables precise control over self-assembled nanomaterials. Engineered peptides form diverse lattice structures, demonstrating versatility in creating materials across multiple length scales.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Computational Chemistry
Background:
- Peptide self-assembly offers precise control over nanomaterial design.
- Designing complex peptide structures and predicting noncovalent interactions is challenging.
Purpose of the Study:
- To computationally design 29-residue peptides that form tetrahelical bundles.
- To engineer these bundles as building blocks for lattice-forming materials.
- To investigate the self-assembly behavior and resulting nanostructures.
Main Methods:
- Computational design of peptide sequences for specific bundle and lattice formation.
- Solution assembly of engineered peptides.
- Characterization using transmission electron microscopy (TEM) and small-angle neutron scattering (SANS).
Main Results:
- Three distinct lattice-forming materials were successfully assembled, with varying degrees of agreement to designed lattices.
- One peptide design resulted in isolated, soluble tetrameric bundles, confirmed by SANS.
- Lattice formation was robust to changes in solution conditions (pH, temperature) and covalent modification.
- Solution conditions influenced the micrometer-scale morphology of the assemblies.
Conclusions:
- A single peptide motif can yield diverse self-assembled lattice morphologies.
- Precise control over molecular structure and solution conditions is key to versatile nanomaterial fabrication.
- This approach enables the creation of materials across length scales from 1 to 1000 nm.
