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Spatiotemporal Control over Polynucleotide Brush Growth on DNA Origami Nanostructures |
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| Authors: | Dr Yunqi Yang Dr Qinyi Lu Yu Chen Marcello DeLuca Prof?Dr Gaurav Arya Prof?Dr Yonggang Ke Prof?Dr Stefan Zauscher |
| Institution: | 1. Department of Mechanical Engineering and Materials Science, Department of Biomedical Engineering, Duke University, Durham, NC 27708 USA
These authors contributed equally to this work.;2. Department of Chemistry, Emory University, Atlanta, GA 30322 USA These authors contributed equally to this work.;3. University Program in Materials Science and Engineering, Duke University, Durham, NC 27708 USA;4. Department of Mechanical Engineering and Materials Science, Duke University, Durham, NC 27708 USA;5. Department of Mechanical Engineering and Materials Science, Department of Biomedical Engineering, Duke University, Durham, NC 27708 USA;6. Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA 30322 USA |
| Abstract: | DNA nanotechnology provides an approach to create precise, tunable, and biocompatible nanostructures for biomedical applications. However, the stability of these structures is severely compromised in biological milieu due to their fast degradation by nucleases. Recently, we showed how enzymatic polymerization could be harnessed to grow polynucleotide brushes of tunable length and location on the surface of DNA origami nanostructures, which greatly enhances their nuclease stability. Here, we report on strategies that allow for both spatial and temporal control over polymerization through activatable initiation, cleavage, and regeneration of polynucleotide brushes using restriction enzymes. The ability to site-specifically decorate DNA origami nanostructures with polynucleotide brushes in a spatiotemporally controlled way provides access to “smart” functionalized DNA architectures with potential applications in drug delivery and supramolecular assembly. |
| Keywords: | DNA Nanostructures Restriction Enzymes Sequential Brush Growth Surface-Initiated Polymerization Terminal Deoxynucleotidyl Transferase |