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Updated: Jan 20, 2026

Single-Molecule Fluorescence Visualization of DNA Polymerase Dynamics at G-Quadruplexes
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Modulation of DNA structure formation using small molecules.

Imee M A Del Mundo1, Karen M Vasquez1, Guliang Wang1

  • 1Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Dell Pediatric Research Institute, 1400 Barbara Jordan Blvd., Austin, TX 78723, USA.

Biochimica Et Biophysica Acta. Molecular Cell Research
|September 7, 2019
PubMed
Summary
This summary is machine-generated.

Genetic instability, linked to mutations at non-B DNA structures, drives disease. Small molecules and probes targeting these DNA structures offer potential for preventing and treating genetic diseases like cancer.

Keywords:
DNA destabilizersDNA stabilizersGenetic instabilityNon-B DNASmall molecule DNA probesSmall molecule ligands

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Area of Science:

  • Molecular Biology
  • Genetics
  • Medicinal Chemistry

Background:

  • Genome integrity is crucial for cell function; instability leads to disease.
  • Mutations cluster at "hotspot" regions, often coinciding with non-B DNA structures.
  • Non-B DNA structures are mutagenic, induce DNA double-strand breaks, and are common in cancer genomes.

Purpose of the Study:

  • To review small molecules that modulate non-B DNA structures.
  • To discuss molecular probes for studying non-B DNA roles in genetic instability.
  • To explore potential therapeutic applications of DNA structure-modulating agents.

Main Methods:

  • Literature review of reported non-B DNA stabilizers, destabilizers, and probes.
  • Discussion of recent assays developed for identifying ligands of non-B DNA structures.
  • Analysis of biological applications and implications of these molecules.

Main Results:

  • Non-B DNA-forming sequences are enriched at mutation hotspots in human cancer.
  • Small molecules can stabilize or destabilize non-B DNA structures.
  • Molecular probes are being developed to investigate the functional roles of non-B DNA.

Conclusions:

  • Modulating non-B DNA structures with small molecules holds promise for preventing/treating genetic diseases.
  • Development of targeted probes is essential for understanding non-B DNA's role in cancer etiology.
  • Further research into DNA structure-modulating molecules is warranted for therapeutic and diagnostic applications.