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Deoxyribonucleic acid, or DNA, is the genetic material responsible for passing traits from generation to generation in all organisms and most viruses. DNA is composed of two strands of nucleotides that wind around each other to form a spring-like structure called a double helix. However, the double helix is not perfectly symmetrical. Instead, there are regularly occurring grooves in the structure. The major groove occurs where the sugar-phosphate backbones are relatively far apart. This space...
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DNA-Tethered RNA Polymerase for Programmable In vitro Transcription and Molecular Computation
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Published on: December 29, 2021

Diamondoid-modified DNA.

Yan Wang1, Boryslav A Tkachenko, Peter R Schreiner

  • 1Department of Chemistry, University of Konstanz, Universitätsstrasse 10, 78457, Konstanz, Germany.

Organic & Biomolecular Chemistry
|September 21, 2011
PubMed
Summary
This summary is machine-generated.

Novel diamondoid-modified nucleotides were synthesized and tested for DNA incorporation. While single incorporations were successful, multiple incorporations were limited, though resulting DNA structures remained stable.

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Area of Science:

  • Synthetic organic chemistry
  • Nucleotide chemistry
  • Biochemistry

Background:

  • Diamondoid structures offer unique steric and electronic properties.
  • Functionalization of nucleobases is key to developing novel nucleic acid analogues.
  • Understanding enzymatic incorporation is crucial for DNA synthesis and modification.

Purpose of the Study:

  • To synthesize novel C5-modified triphosphates and phosphoramidites with a diamondoid group.
  • To investigate the enzymatic incorporation and extension of these modified nucleotides in DNA synthesis.
  • To characterize the structural properties of oligonucleotides containing these modifications.

Main Methods:

  • Chemical synthesis of modified nucleoside triphosphates and phosphoramidites.
  • Primer extension assays using DNA polymerase to assess incorporation and extension.
  • Oligonucleotide synthesis using automated DNA synthesizer technology.
  • Structural analysis via circular dichroism (CD) and melting temperature (Tm) measurements.

Main Results:

  • All three modified nucleotides were incorporated into DNA in single-nucleotide incorporation experiments.
  • Multiple incorporations of modified nucleotides were only partially successful.
  • Oligonucleotides containing the modified phosphoramidites exhibited DNA helix conformations similar to unmodified counterparts.
  • CD and Tm measurements confirmed structural integrity of modified oligonucleotides.

Conclusions:

  • The novel diamondoid-modified nucleotides show potential for specific applications in DNA synthesis.
  • Enzymatic incorporation is feasible but limited for multiple additions of these bulky modifications.
  • The diamondoid modification does not significantly disrupt the overall DNA helix structure.