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Related Concept Videos

Genome Annotation and Assembly03:36

Genome Annotation and Assembly

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The genome refers to all of the genetic material in an organism. It can range from a few million base pairs in microbial cells to several billion base pairs in many eukaryotic organisms. Genome assembly refers to the process of taking the DNA sequencing data and putting it all back together in a correct order to create a close representation of the original genome. This is followed by the identification of functional elements on the newly assembled genome, a process called genome annotation.
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In the same year as the discovery of the Sanger sequencing method, another group of scientists, Allan Maxam and Walter Gilbert, demonstrated their chemical-cleavage method for DNA sequencing. The Maxam-Gilbert method relies on using different chemicals that can cleave the DNA sequence at specific sites, the separation of resulting DNA fragments of variable size using electrophoresis, and deciphering the DNA sequence from the resulting gel bands.
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Related Experiment Video

Updated: May 1, 2026

Self-assembly of Complex Two-dimensional Shapes from Single-stranded DNA Tiles
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Quantifying quality in DNA self-assembly.

Klaus F Wagenbauer1, Christian H Wachauf1, Hendrik Dietz2

  • 11] Physik Department, Walter Schottky Institute, Technische Universität München, Am Coulombwall 4a, 85748 Garching, Germany [2].

Nature Communications
|April 23, 2014
PubMed
Summary
This summary is machine-generated.

Researchers developed a new assay to measure DNA self-assembly quality. This method accurately assesses the integration of DNA strands in complex nanoscale structures, achieving up to 99% quality.

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Area of Science:

  • Nanotechnology
  • Molecular Biology
  • Biochemistry

Background:

  • DNA self-assembly offers a precise method for creating nanoscale devices.
  • Evaluating the quality of these assembled structures, particularly their composition and structural integrity, is crucial for advancing the field.

Purpose of the Study:

  • To develop and validate a sensitive assay for assessing the quality of molecular self-assembly using DNA.
  • To quantify the content of unpaired DNA bases in self-assembled DNA objects.

Main Methods:

  • A novel assay was developed utilizing a fluorescent de-Bruijn probe to detect three-base 'codons' representing unpaired DNA bases.
  • The assay measures the quantity of unpaired DNA bases and compares it to the designed content in self-assembled DNA objects.

Main Results:

  • The assay was successfully applied to evaluate the assembly quality of multilayer DNA origami objects.
  • Data indicated high strand integration quality, reaching up to 99% for large and complex DNA origami structures.
  • The assay facilitated the rational refinement of DNA assembly protocols.

Conclusions:

  • A sensitive and quantitative assay for DNA self-assembly quality has been established.
  • The developed method allows for high-precision assessment of complex DNA nanostructures, enabling quality control and protocol optimization.
  • The assay's potential application extends to analyzing cellular nucleic acids by discriminating between paired and unpaired bases.