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Related Experiment Videos

Single Molecule Analysis of Resection Tracks.

Pablo Huertas1, Andrés Cruz-García2

  • 1Centro Andaluz de Biología Molecular y Medicina Regenerativa-CABIMER, Universidad de Sevilla-CSIC-Universidad Pablo de Olavide, E-41092, Sevilla, Spain. pablo.huertas@cabimer.es.

Methods in Molecular Biology (Clifton, N.J.)
|October 19, 2017
PubMed
Summary

Researchers developed Single Molecule Analysis of Resection Tracks (SMART) to measure DNA end resection in human cells. This novel method allows high-resolution analysis of DNA repair processes following double-strand breaks.

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Area of Science:

  • Molecular Biology
  • Genetics
  • DNA Repair Mechanisms

Background:

  • Homologous recombination, a critical DNA repair pathway, begins with DNA end resection.
  • The extent of DNA resection influences the choice of recombination pathways.
  • Previous methods for measuring DNA resection in human cells lacked high resolution, especially for breaks at unknown locations.

Purpose of the Study:

  • To introduce a novel, high-resolution assay for studying DNA end resection in human cells.
  • To enable the measurement of DNA resection at individual DNA fibers, even at unknown break sites.

Main Methods:

  • Adaptation of the DNA-combing technique, typically used for replication studies.
  • Induction of double-strand breaks using ionizing radiation (or other DNA damaging agents).
Keywords:
DNA combingDNA resectionFiber assayHigh-resolution resection assaySMART

Related Experiment Videos

  • Development of the Single Molecule Analysis of Resection Tracks (SMART) assay.

    • Main Results:

    • SMART allows for the measurement of DNA resection progression at the single-molecule level.
    • The assay is applicable to DNA double-strand breaks induced by ionizing radiation in human cells.
    • The methodology can be adapted for other DNA damaging agents and potentially other model organisms.

    Conclusions:

    • SMART provides a powerful new tool for high-resolution analysis of DNA end resection in human cells.
    • This method overcomes previous technical limitations in studying DNA repair at unknown break sites.
    • The SMART assay has broad applicability for investigating DNA repair and recombination pathways.