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Updated: Dec 21, 2025

Spot Variation Fluorescence Correlation Spectroscopy for Analysis of Molecular Diffusion at the Plasma Membrane of Living Cells
Published on: November 12, 2020
The flipside of the TOR coin - TORC2 and plasma membrane homeostasis at a glance
Margot Riggi1,2,3, Beata Kusmider1,3, Robbie Loewith4,3
1Swiss National Centre for Competence in Research Program Chemical Biology, Geneva, Switzerland.
Abstract:
Target of rapamycin (TOR) is a serine/threonine protein kinase conserved in most eukaryote organisms. TOR assembles into two multiprotein complexes (TORC1 and TORC2), which function as regulators of cellular growth and homeostasis by serving as direct transducers of extracellular biotic and abiotic signals, and, through their participation in intrinsic feedback loops, respectively. TORC1, the better-studied complex, is mainly involved in cell volume homeostasis through regulating accumulation of proteins and other macromolecules, while the functions of the lesser-studied TORC2 are only now starting to emerge. In this Cell Science at a Glance article and accompanying poster, we aim to highlight recent advances in our understanding of TORC2 signalling, particularly those derived from studies in yeast wherein TORC2 has emerged as a major regulator of cell surface homeostasis.
Insights
Target of rapamycin complex 2 (TORC2) regulates cell surface homeostasis. Recent studies in yeast highlight TORC2
Area of Science:
- Cell Biology
- Molecular Biology
- Biochemistry
Background:
- Target of rapamycin (TOR) is a conserved kinase regulating cellular processes.
- TOR forms two complexes: TORC1 and TORC2, with distinct functions.
- TORC1 regulates cell growth and homeostasis; TORC2 functions are less understood.
Purpose of the Study:
- To review recent advances in understanding TORC2 signaling.
- To highlight TORC2's role in cell surface homeostasis, particularly in yeast.
Main Methods:
- Literature review of recent studies on TORC2 signaling.
- Focus on findings from yeast models.
Main Results:
- TORC2 is emerging as a key regulator of cell surface homeostasis.
- Studies in yeast provide significant insights into TORC2 functions.
Conclusions:
- TORC2 plays a critical role in maintaining cell surface integrity.
- Further research into TORC2 signaling pathways is warranted.
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