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mTOR-what does it do?

M N Hall1

  • 1Biozentrum, University of Basel, Switzerland. M.Hall@unibas.ch

Transplantation Proceedings
|December 23, 2008
PubMed
Summary
This summary is machine-generated.

Target of rapamycin (TOR) is a conserved kinase regulating cell growth. It functions in two complexes, TORC1 and TORC2, controlling various cellular processes and impacting development and disease.

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Area of Science:

  • Cellular and Molecular Biology
  • Biochemistry
  • Developmental Biology

Background:

  • Target of rapamycin (TOR) is a crucial serine/threonine kinase conserved across eukaryotes.
  • TOR regulates fundamental cellular processes like growth and metabolism in response to environmental cues.
  • TOR signaling pathways have revolutionized the understanding of cell growth regulation.

Purpose of the Study:

  • To elucidate the conserved role of TOR signaling in controlling eukaryotic cell growth.
  • To differentiate the functions of the two major TOR complexes, TORC1 and TORC2.
  • To highlight the implications of TOR signaling in development, aging, and disease.

Main Methods:

  • Comparative analysis of TOR and its complexes across different eukaryotic species.
  • Identification of protein components within TORC1 and TORC2 complexes.
  • Review of known cellular processes regulated by TORC1 and TORC2.

Main Results:

  • TOR is conserved in all eukaryotes, controlling cell growth and metabolism.
  • TOR exists in two distinct complexes: TORC1 (rapamycin-sensitive) and TORC2 (rapamycin-insensitive).
  • TORC1 regulates temporal aspects of cell growth (translation, transcription, autophagy), while TORC2 controls spatial aspects (actin cytoskeleton).

Conclusions:

  • TORC1 and TORC2 form an ancient signaling network essential for cell growth.
  • Dysregulation of TOR signaling is linked to major diseases including cancer and diabetes.
  • Further research is needed to understand TOR's role in multicellular organismal growth.