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Updated: Jun 27, 2025

Analyzing and Building Nucleic Acid Structures with 3DNA
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Base-Filling in Double-Helical Nucleic Acids.

Mark Nana Kwame Afari1, Tuomas Lönnberg1

  • 1Department of Chemistry, University of Turku, Henrikinkatu 2, 20500, Turku, Finland.

Chemistryopen
|May 6, 2024
PubMed
Summary

Base-filling offers a novel method for oligonucleotide synthesis, attaching bases post-synthesis for enhanced efficiency and fidelity. This approach utilizes reversible chemistry, enabling dynamic combinatorial synthesis of DNA and RNA analogues.

Keywords:
base pairingbase stackingdynamic combinatorial chemistryoligonucleotideunnatural backbone

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Area of Science:

  • Oligonucleotide chemistry
  • Synthetic organic chemistry

Background:

  • Conventional oligonucleotide synthesis relies on sequential coupling of building blocks.
  • Post-synthetic modification, or base-filling, presents an alternative strategy.
  • Reversible attachment of base moieties is key for dynamic combinatorial chemistry.

Purpose of the Study:

  • To review base-filling strategies for oligonucleotide synthesis.
  • To discuss backbones and coupling reactions used in base-filling.
  • To explore the impact of base stacking and pairing on fidelity and efficiency.

Main Methods:

  • Literature review of base-filling techniques over the past 15 years.
  • Analysis of different oligonucleotide backbones and coupling chemistries.
  • Examination of factors influencing base-filling efficiency and fidelity.

Main Results:

  • Summarized various backbones and coupling reactions for base-filling.
  • Discussed the role of base stacking and pairing in synthesis outcomes.
  • Highlighted existing and potential applications of base-filling.

Conclusions:

  • Base-filling is a viable and attractive alternative to traditional oligonucleotide synthesis.
  • Reversible base attachment enhances fidelity and enables dynamic combinatorial approaches.
  • The technique holds significant promise for various applications in chemistry and biology.