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Two structural features of the DNA molecule provide a basis for the mechanisms of heredity: the four nucleotide bases and its double-stranded nature. The Watson-Crick model of double-helical DNA structure, proposed in 1952, drew heavily upon the X-ray crystallography work of researchers Rosalind Franklin and Maurice Wilkins. Watson, Crick, and Wilkins jointly received the Nobel Prize in Physiology or Medicine for their work in 1962. Franklin was, controversially, excluded from the prize for...
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An organism’s genome needs to be duplicated in an efficient and error-free manner for its growth and survival. The replication fork is a Y-shaped active region where two strands of DNA are separated and replicated continuously. The coupling of DNA unzipping and complementary strand synthesis is a characteristic feature of a replication fork.   Organisms with small circular DNA, such as E. coli, often have a single origin of replication; therefore, they have only two replication...
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DNA replication is carried out by a large complex of proteins that act in a coordinated matter to achieve high-fidelity DNA replication. Together this complex is known as the DNA replication machinery or the replisome.
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During replication, the complementary strands in double-stranded DNA are synthesized at different rates. Replication first begins on the leading strand. Replication starts later, occurs more slowly, and proceeds discontinuously on the lagging strand.
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DNA replication involves the separation of the two strands of the double helix, with each strand serving as a template from which the new complementary strand is copied.  After replication, each double-stranded DNA includes one parental or “old” strand and one “new” strand. This is known as semiconservative replication. The resulting DNA molecules have the same sequence and are divided equally into the two daughter cells.
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Folding and Characterization of a Bio-responsive Robot from DNA Origami
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How We Simulate DNA Origami.

Sarah Haggenmueller1, Michael Matthies1, Matthew Sample2,3

  • 1School of Natural Sciences, Department of Bioscience, Technical University Munich, 85748, Garching, Germany.

Small Methods
|February 5, 2025
PubMed
Summary
This summary is machine-generated.

This tutorial introduces simulating DNA origami structures using the oxDNA model, a coarse-grained approach for nucleic acid nanotechnology. It aids experimentalists in integrating computational analysis for faster design and characterization of nanoscale shapes.

Keywords:
DNA origamicoarse‐grained modelsmolecular dynamicsoxDNA

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Area of Science:

  • Nucleic acid nanotechnology
  • Bionanotechnology
  • Computational biophysics

Background:

  • DNA origami utilizes scaffold and staple strands for self-assembly into nanoscale shapes.
  • It is a cost-effective method for creating diverse 2D and 3D structures with applications in nanofabrication, diagnostics, and therapeutics.
  • Simulating DNA origami aids in understanding shape and function, accelerating the design process.

Purpose of the Study:

  • To provide a general approach for simulating DNA origami structures.
  • To introduce the oxDNA ecosystem for in silico characterization of DNA nanostructures.
  • To assist experimentalists in integrating computational analysis into their workflow.

Main Methods:

  • Utilizing the oxDNA coarse-grained model, specifically designed for DNA nanotechnology.
  • Employing the oxDNA ecosystem's visualization and analysis tools.
  • Presenting a tutorial-based approach for simulating large DNA origami structures.

Main Results:

  • Demonstration of a feasible method for simulating complex DNA origami structures.
  • Highlighting the utility of oxDNA for in silico characterization.
  • Facilitating the integration of computational methods with experimental work.

Conclusions:

  • The oxDNA ecosystem offers powerful simulation capabilities for DNA origami.
  • This approach can complement experimental efforts by providing in silico insights.
  • It simplifies and speeds up the design and analysis of DNA nanostructures.