Journal
CHEMBIOCHEM
Volume 20, Issue 22, Pages 2818-2823Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cbic.201900369
Keywords
DNA; DNA origami; endonucleases; high-speed atomic force microscopy; nanotechnology
Funding
- Academy of Finland [286845, 308578, 303804, 267497]
- Sigrid Juselius Foundation
- Jane and Aatos Erkko Foundation
- Academy of Finland (AKA) [303804, 303804] Funding Source: Academy of Finland (AKA)
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DNA nanostructures have emerged as intriguing tools for numerous biomedical applications. However, in many of those applications and most notably in drug delivery, their stability and function may be compromised by the biological media. A particularly important issue for medical applications is their interaction with proteins such as endonucleases, which may degrade the well-defined nanoscale shapes. Herein, fundamental insights into this interaction are provided by monitoring DNase I digestion of four structurally distinct DNA origami nanostructures (DONs) in real time and at a single-structure level by using high-speed atomic force microscopy. The effect of the solid-liquid interface on DON digestion is also assessed by comparison with experiments in bulk solution. It is shown that DON digestion is strongly dependent on its superstructure and flexibility and on the local topology of the individual structure.
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