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Related Concept Videos

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Folding and Characterization of a Bio-responsive Robot from DNA Origami
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Designing Rigid DNA Origami Templates for Molecular Visualization Using Cryo-EM.

Ali Khoshouei1,2, Georg Kempf3, Volodymyr Mykhailiuk1,2

  • 1Laboratory for Biomolecular Nanotechnology, Department of Biosciences, School of Natural Sciences, Technical University of Munich, Am Coulombwall 4a, 85748 Garching, Germany.

Nano Letters
|April 11, 2024
PubMed
Summary

This study reveals how DNA origami nanostructure design, specifically internal crossovers and staple strand uniformity, impacts multilayer assembly. Researchers successfully visualized a small molecule attached to the DNA origami, expanding its structural potential.

Keywords:
Cryo-EMDNA origamiDesign OptimizationScaffoldingThrombin Binding Aptamer

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Area of Science:

  • Nanotechnology
  • Biochemistry
  • Structural Biology

Background:

  • DNA origami enables programmable construction of complex nanostructures.
  • These structures can integrate diverse molecular functionalities for various applications.
  • Understanding factors influencing DNA origami assembly is crucial for advanced designs.

Purpose of the Study:

  • To investigate the effect of internal crossover distribution on multilayer DNA origami structure.
  • To analyze the influence of staple strand compositional uniformity on DNA origami assembly.
  • To demonstrate the capability of resolving small molecular components within DNA origami structures.

Main Methods:

  • Cryogenic electron microscopy (cryo-EM) single-particle analysis was employed.
  • A refined DNA object served as an alignment framework in a host-guest model.
  • The structural integrity and component resolution of DNA origami were assessed.

Main Results:

  • Internal crossover distribution and staple strand uniformity significantly impact multilayer DNA origami structural fidelity.
  • An 8 kDa thrombin binding aptamer (TBA) was successfully resolved when linked to the host DNA object.
  • The study provides high-resolution structural insights into DNA origami assembly.

Conclusions:

  • Precise control over DNA origami design parameters is essential for predictable nanostructure formation.
  • Cryo-EM single-particle analysis is effective for characterizing complex DNA nanostructures and integrated molecules.
  • This work expands the utility of DNA nanotechnology in structural and functional applications.