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Related Experiment Videos

TOR regulation: sorting out the answers.

Thomas P Neufeld1

  • 1Department of Genetics, Cell Biology & Development, University of Minnesota, 6-160 Jackson Hall, 321 Church Street SE, Minneapolis, MN 55455, USA. neufeld@ahc.umn.edu

Cell Metabolism
|December 26, 2006
PubMed
Summary
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Vesicle trafficking proteins regulate the target of rapamycin (TOR) pathway. Pmr1, a Golgi calcium/manganese ATPase, is identified as a novel regulator of TOR signaling and its targets in yeast.

Area of Science:

  • Cellular Biology
  • Molecular Biology
  • Biochemistry

Background:

  • Vesicle trafficking, including secretion, endocytosis, and autophagy, plays a crucial role in cellular processes.
  • The target of rapamycin (TOR) signaling pathway is a central regulator of cell growth, metabolism, and survival.
  • Components of vesicle trafficking are increasingly recognized as modulators of TOR signaling.

Purpose of the Study:

  • To investigate the role of Pmr1, a Ca(2+)/Mn(2+) ATPase, in regulating TOR signaling.
  • To identify novel components of the secretory pathway that influence TOR pathway activity.

Main Methods:

  • Yeast as a model organism.
  • Biochemical assays to assess TOR signaling activity.
  • Genetic manipulation of Pmr1 function.

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Main Results:

  • Pmr1, localized to the Golgi apparatus, was identified as a novel regulator of TOR signaling in yeast.
  • Pmr1 influences downstream targets of the TOR pathway.
  • The secretory pathway Ca(2+)/Mn(2+) ATPase activity is linked to TOR pathway regulation.

Conclusions:

  • Pmr1 is a novel component linking vesicle trafficking and TOR signaling.
  • The Golgi apparatus and its ion homeostasis are important for TOR pathway regulation.
  • This finding expands the understanding of how cellular transport machinery impacts nutrient-sensing pathways.