4.6 Review

Experimental Approaches in Delineating mTOR Signaling

Journal

GENES
Volume 11, Issue 7, Pages -

Publisher

MDPI
DOI: 10.3390/genes11070738

Keywords

mTOR; experimental approach; biochemical approach; genetic approach; hypothesis-driven; immunofluorescence; protein motif search; bioinformatic approach

Funding

  1. NIH [R21CA234979]
  2. V Scholar Grant [V2018-009]
  3. Breast Cancer Alliance Young Investigator Grant
  4. NCBC Flush Grant
  5. UNC Lineberger Comprehensive Cancer Center Development Award
  6. UNC University Cancer Research Fund

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The mTOR signaling controls essential biological functions including proliferation, growth, metabolism, autophagy, ageing, and others. Hyperactivation of mTOR signaling leads to a plethora of human disorders; thus, mTOR is an attractive drug target. The discovery of mTOR signaling started from isolation of rapamycin in 1975 and cloning of TOR genes in 1993. In the past 27 years, numerous research groups have contributed significantly to advancing our understanding of mTOR signaling and mTOR biology. Notably, a variety of experimental approaches have been employed in these studies to identify key mTOR pathway members that shape up the mTOR signaling we know today. Technique development drives mTOR research, while canonical biochemical and yeast genetics lay the foundation for mTOR studies. Here in this review, we summarize major experimental approaches used in the past in delineating mTOR signaling, including biochemical immunoprecipitation approaches, genetic approaches, immunofluorescence microscopic approaches, hypothesis-driven studies, protein sequence or motif search driven approaches, and bioinformatic approaches. We hope that revisiting these distinct types of experimental approaches will provide a blueprint for major techniques driving mTOR research. More importantly, we hope that thinking and reasonings behind these experimental designs will inspire future mTOR research as well as studies of other protein kinases beyond mTOR.

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