Abstract:
:The target of rapamycin complex 2 (TORC2) plays a key role in maintaining the homeostasis of plasma membrane (PM) tension. TORC2 activation following increased PM tension involves redistribution of the Slm1 and 2 paralogues from PM invaginations known as eisosomes into membrane compartments containing TORC2. How Slm1/2 relocalization is triggered, and if/how this plays a role in TORC2 inactivation with decreased PM tension, is unknown. Using osmotic shocks and palmitoylcarnitine as orthogonal tools to manipulate PM tension, we demonstrate that decreased PM tension triggers spontaneous, energy-independent reorganization of pre-existing phosphatidylinositol-4,5-bisphosphate into discrete invaginated membrane domains, which cluster and inactivate TORC2. These results demonstrate that increased and decreased membrane tension are sensed through different mechanisms, highlighting a role for membrane lipid phase separation in mechanotransduction.
journal_name
Nat Cell Bioljournal_title
Nature cell biologyauthors
Riggi M,Niewola-Staszkowska K,Chiaruttini N,Colom A,Kusmider B,Mercier V,Soleimanpour S,Stahl M,Matile S,Roux A,Loewith Rdoi
10.1038/s41556-018-0150-zsubject
Has Abstractpub_date
2018-09-01 00:00:00pages
1043-1051issue
9eissn
1465-7392issn
1476-4679pii
10.1038/s41556-018-0150-zjournal_volume
20pub_type
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