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Related Experiment Videos

Spatial organization of nucleic acid sequences within cells.

J B Lawrence1, R H Singer

  • 1Department of Cell Biology, University of Massachusetts Medical Center, Worcester 01655.

Seminars in Cell Biology
|April 1, 1991
PubMed
Summary

High-resolution in situ hybridization reveals that nucleic acids, including messenger RNAs and genes, have specific intracellular locations. This spatial organization influences cellular structure and function.

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Area of Science:

  • Cell Biology
  • Molecular Biology
  • Genetics

Background:

  • Nucleic acids play crucial roles in cellular processes.
  • Understanding the spatial distribution of nucleic acids within cells is essential for comprehending cellular organization and function.
  • Previous methods lacked the resolution to precisely map nucleic acid locations.

Purpose of the Study:

  • To investigate the intracellular spatial organization of specific nucleic acids using high-resolution techniques.
  • To determine if nucleic acids, including messenger RNAs (mRNAs) and their corresponding genes, exhibit non-random intracellular localization.
  • To explore the implications of nucleic acid spatial organization on cellular structure and function.

Main Methods:

  • Employed high-resolution in situ hybridization techniques.

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  • Utilized nonisotopically labeled probes for detection.
  • Applied fluorescence, alkaline phosphatase (for light microscopy), and colloidal gold (for electron microscopy) for visualization.

    • Main Results:

    • Demonstrated that specific messenger RNAs (mRNAs), nuclear transcripts, and genes exhibit non-random intracellular locations.
    • Observed localization of actin mRNA in the periphery of motile cells, near lamellipodia.
    • Visualized highly localized distributions of Epstein-Barr virus (EBV) primary transcripts, sometimes forming elongated tracks associated with the nuclear matrix.
    • Provided evidence that genes also display defined spatial organization within the cell.

    Conclusions:

    • Nucleic acid sequences contain intrinsic spatial positioning information.
    • The intracellular spatial organization of nucleic acids significantly influences cellular structure and function.
    • High-resolution in situ hybridization is a powerful tool for elucidating the spatial dynamics of nucleic acids within cells.