Encoding Reversible Hierarchical Structures with Supramolecular Peptide-DNA Materials.

Creating soft materials with the tunable hierarchical structures observed in nature remains an enormous challenge. Synthetic hierarchical systems have been reported, yet strategies to reversibly modulate their structure and function are scarce. We report on the programmable self-assembly of peptide-DNA brush copolymers into supramolecular architectures that can be tuned with changes in temperature, pH, or addition of a soluble trigger. A fiber to bundle transition occurs upon mixing peptides bearing complementary oligonucleotides. These hierarchical structures can be reversed using the programmable nature of DNA-DNA interactions. The ability to encode the final assemblies in the composition of both amino acid and DNA building blocks provides a strategy for constructing a unique class of reconfigurable supramolecular materials.