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Quantifying absolute addressability in DNA origami with molecular resolution.

Maximilian T Strauss1,2, Florian Schueder1,2, Daniel Haas1,2

  • 1Department of Physics and Center for Nanoscience, Ludwig Maximilian University, 80539, Munich, Germany.

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|April 25, 2018
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Summary
This summary is machine-generated.

Researchers quantified DNA strand incorporation and accessibility in DNA nanostructures using DNA-PAINT microscopy. Strand incorporation varied by position, impacting nanostructure efficiency and design.

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Area of Science:

  • Nanotechnology
  • Molecular Biology
  • Biophysics

Background:

  • Self-assembled DNA nanostructures offer precise spatial control for functionalization.
  • Efficient attachment of functional entities to DNA strands is crucial for nanostructure performance.
  • Incorporation and accessibility of DNA strands are key factors influencing attachment efficiency.

Purpose of the Study:

  • To quantify the incorporation and accessibility of individual DNA strands within DNA nanostructures.
  • To correlate strand position with incorporation efficiency.
  • To provide a quantitative basis for optimizing DNA nanostructure design and assembly.

Main Methods:

  • Utilized DNA-PAINT super-resolution microscopy for molecular-level analysis.
  • Quantified both the incorporation and accessibility of all individual strands in DNA origami structures.

Main Results:

  • Demonstrated a strong correlation between DNA strand position and incorporation efficiency.
  • Observed incorporation rates ranging from 48% at the edges to 95% in the center of DNA origami.
  • Revealed position-dependent accessibility of strands for downstream modification.

Conclusions:

  • The developed method allows for direct feedback to refine DNA nanostructure design and assembly.
  • Provides a quantitative explanation for the varying efficiencies observed in DNA-based nanomachines.
  • Enables rational design of more efficient and predictable DNA nanostructures.