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Automated Robotic Liquid Handling Assembly of Modular DNA Devices
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Published on: December 1, 2017

A versatile toolbox for variable DNA functionalization at high density.

Stefan Jäger1, Goran Rasched, Hagit Kornreich-Leshem

  • 1Kekuké-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, D-53121 Bonn, Germany.

Journal of the American Chemical Society
|October 27, 2005
PubMed
Summary
This summary is machine-generated.

Chemically modified DNA (fDNA) can be synthesized using primer extension and PCR with modified nucleotides. Enzyme choice and sequence composition affect fDNA synthesis, with implications for DNA structure and applications.

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Area of Science:

  • Chemical Biology
  • Molecular Biology
  • Biotechnology

Background:

  • Chemically modified DNA (fDNA) is crucial for applications in nanotechnology, material science, and sensor development.
  • Current methods require strategies for introducing diverse modifications into single DNA sequences simultaneously.

Purpose of the Study:

  • To investigate the feasibility and limitations of synthesizing high-density functionalized DNA (fDNA) using primer extension and PCR.
  • To explore the impact of modified deoxynucleotide triphosphates (dNTPs), DNA polymerases, and templates on fDNA synthesis.

Main Methods:

  • Utilized primer extension and PCR with a variety of chemically modified dNTPs, DNA polymerases, and templates.
  • Substituted natural nucleobases with up to four different base-modified analogues.
  • Analyzed sequence dependence of enzymatic amplification and conformational changes using CD spectroscopy.

Main Results:

  • Enzymatic amplification efficiency depends on sequence composition (AT-rich preferred over GC-rich) and DNA polymerase family (Family B superior to Family A for challenging templates).
  • Single base modifications do not alter the B-type DNA structure.
  • A density of three modified bases induces conformational changes, observable as CD spectra inversion.

Conclusions:

  • Established a basis for a versatile toolbox for generating high-density fDNA.
  • Demonstrated the influence of sequence and polymerase choice on fDNA synthesis.
  • Highlighted structural consequences of high-density DNA modification.