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  Quantification of Strand Accessibility in Biostable DNA Origami with Single-Staple Resolution

Eklund, A. S., Comberlato, A., Parish, I. A., Jungmann, R., & Bastings, M. M. C. (2021). Quantification of Strand Accessibility in Biostable DNA Origami with Single-Staple Resolution. ACS Nano, 15(11), 17668-17677. doi:10.1021/acsnano.1c05540.

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© 2021 The Authors.

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 Creators:
Eklund, Alexandra S.1, Author              
Comberlato, Alice2, Author
Parish, Ian A.2, Author
Jungmann, Ralf1, Author              
Bastings, Maartje M. C.2, Author
Affiliations:
1Jungmann, Ralf / Molecular Imaging and Bionanotechnology, Max Planck Institute of Biochemistry, Max Planck Society, ou_2149679              
2external, ou_persistent22              

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Free keywords: SUPERRESOLUTION MICROSCOPY; NANOSTRUCTURES; SHAPESChemistry; Science & Technology - Other Topics; Materials Science; DNA origami; DNA-PAINT; super-resolution microscopy; structure stability; handle accessibility; nanotherapeutics; nanopatterns;
 Abstract: DNA-based nanostructures are actively gaining interest as tools for biomedical and therapeutic applications following the recent development of protective coating strategies prolonging structural integrity in physiological conditions. For tailored biological action, these nanostructures are often functionalized with targeting or imaging labels using DNA base pairing. Only if these labels are accessible on the structure's surface will they be able to interact with their intended biological target. However, the accessibility of functional sites for different geometries and environments, specifically after the application of a protective coating, is currently not known. Here, we assay this accessibility on the level of single handle strands with two- and three-dimensional resolution using DNA-PAINT and show that the hybridization kinetics of top and bottom sides on the same nanostructure linked to a surface remain unaltered. We furthermore demonstrate that the functionality of the structures remains available after an oligolysine-PEG coating is applied, enabling bioassays where functionality and stability are imperative.

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Language(s): eng - English
 Dates: 2021
 Publication Status: Published in print
 Pages: 10
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: 000747115200048
DOI: 10.1021/acsnano.1c05540
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Title: ACS Nano
  Other : ACS Nano
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 15 (11) Sequence Number: - Start / End Page: 17668 - 17677 Identifier: ISSN: 1936-0851
CoNE: https://pure.mpg.de/cone/journals/resource/1936-0851