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Pib2 as an Emerging Master Regulator of Yeast TORC1

Riko Hatakeyama1

  • 1Institute of Medical Sciences, School of Medicine, Medical Sciences & Nutrition, University of Aberdeen, Foresterhill, Aberdeen AB25 2ZD, UK.

Biomolecules
|October 23, 2021
PubMed

Insights

The phosphatidylinositol(3)-phosphate binding protein 2 (Pib2) is a newly identified regulator of the Target of Rapamycin Complex 1 (TORC1) pathway. This review summarizes current knowledge and future research directions for Pib2

Area of Science:

  • Cellular biology
  • Molecular biology
  • Biochemistry

Background:

  • Cell growth is tightly regulated by external signals like nutrients and growth factors.
  • The Target of Rapamycin Complex 1 (TORC1) is a key conserved kinase complex controlling cellular adaptation.
  • Understanding how signals reach TORC1 is crucial for cell growth regulation.

Purpose of the Study:

  • To review the emerging role of yeast phosphatidylinositol(3)-phosphate binding protein 2 (Pib2) in TORC1 signaling.
  • To summarize current mechanistic insights into how Pib2 relays nutrient signals to TORC1.
  • To highlight outstanding questions and future research directions for Pib2.

Main Methods:

  • Literature review of studies on Pib2 function in yeast (Saccharomyces cerevisiae).
  • Analysis of experimental data linking Pib2 to nutrient sensing and TORC1 activity.
  • Synthesis of findings from multiple research groups.

Main Results:

  • Pib2 has been identified as a critical regulator connecting upstream signals to TORC1.
  • Mechanistic studies reveal Pib2's role in transmitting nutrient availability information.
  • Significant knowledge gaps remain regarding Pib2's complete function and regulation.

Conclusions:

  • Pib2 is an emerging key player in the intricate network regulating cell growth.
  • Further investigation is needed to fully elucidate Pib2's mechanisms and its broader implications.
  • This review provides a foundational summary for future research on Pib2 and TORC1 signaling.
Keywords:
Pib2TORTORC1mTORmTORC1yeast

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