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Related Experiment Videos

RNA thermometers.

Franz Narberhaus1, Torsten Waldminghaus, Saheli Chowdhury

  • 1Lehrstuhl für Biologie der Mikroorganismen, Ruhr-Universität Bochum, Bochum, Germany. franz.narberhaus@rub.de

FEMS Microbiology Reviews
|January 28, 2006
PubMed
Summary
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Cells constantly monitor temperature, regulating gene expression through RNA thermometers. These RNA structures change shape with temperature, controlling protein production by masking or revealing ribosome-binding sites.

Area of Science:

  • Molecular Biology
  • Gene Regulation
  • Microbiology

Background:

  • Cells continuously sense and respond to ambient temperature.
  • Gene expression, including heat-shock, cold-shock, and virulence genes, is temperature-dependent.
  • RNA thermometers represent a key translational control mechanism alongside protein-mediated transcriptional regulation.

Purpose of the Study:

  • To explain the regulatory role of RNA thermometers in gene expression.
  • To detail how RNA thermometers function as temperature sensors.
  • To present examples of both cis-acting and trans-acting RNA thermometers.

Main Methods:

  • Analysis of RNA structures and their conformational changes.
  • Investigating the interaction between RNA thermometers and ribosome-binding sites.

Related Experiment Videos

  • Characterization of temperature-dependent gene expression regulation.

    • Main Results:

    • RNA thermometers are complex RNA structures that alter conformation with temperature.
    • Typically located in the 5'-untranslated region, they mask ribosome-binding sites at low temperatures.
    • Increased temperatures melt these structures, enabling translation initiation.

    Conclusions:

    • RNA thermometers are crucial for coordinating gene expression in response to temperature fluctuations.
    • This mechanism allows for rapid and efficient adaptation to thermal changes.
    • The study highlights diverse RNA thermometer mechanisms, including cis- and trans-acting forms.