Regulation of translation via TOR signaling: insights from Drosophila melanogaster

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M Miron1, N Sonenberg

  • 1Department of Biochemistry and McGill Cancer Center, McGill University, Montréal, Québec, Canada.

The Journal of Nutrition
|November 6, 2001
PubMed

Insights

Target of rapamycin (TOR) proteins regulate growth by sensing nutrients and blocking growth signals when nutrients are scarce. Studies in Drosophila show TOR and insulin signaling converge on the translational machinery to control growth.

Area of Science:

  • Molecular Biology
  • Cellular Biology
  • Genetics

Background:

  • Target of rapamycin (TOR) proteins are highly conserved, large protein kinases crucial for nutrient sensing.
  • TOR acts as a checkpoint, restricting organismal growth during low nutrient availability by inhibiting growth-promoting signals.
  • Both insulin-like and TOR signaling pathways are vital for promoting growth.

Purpose of the Study:

  • To elucidate the downstream targets of TOR and insulin-like signaling pathways.
  • To understand the mechanisms by which these pathways regulate cellular growth in response to nutrient availability.

Main Methods:

  • Genetic studies in Drosophila melanogaster.
  • Analysis of signaling pathways involved in growth regulation.

Main Results:

  • TOR and insulin-like signaling are essential for promoting growth.
  • The translational machinery is a key downstream target of both TOR and insulin-like signaling pathways.

Conclusions:

  • TOR and insulin signaling converge on the translational machinery to control growth.
  • This convergence provides a critical mechanism for nutrient-dependent growth regulation.

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