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AAA + ATPase Thorase inhibits mTOR signaling through the disassembly of the mTOR complex 1
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AAA + ATPase Thorase inhibits mTOR signaling through the disassembly of the mTOR complex 1
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Journal Article
AAA + ATPase Thorase inhibits mTOR signaling through the disassembly of the mTOR complex 1
2022
Overview
The mechanistic target of rapamycin (mTOR) signals through the mTOR complex 1 (mTORC1) and the mTOR complex 2 to maintain cellular and organismal homeostasis. Failure to finely tune mTOR activity results in metabolic dysregulation and disease. While there is substantial understanding of the molecular events leading mTORC1 activation at the lysosome, remarkably little is known about what terminates mTORC1 signaling. Here, we show that the AAA + ATPase Thorase directly binds mTOR, thereby orchestrating the disassembly and inactivation of mTORC1. Thorase disrupts the association of mTOR to Raptor at the mitochondria-lysosome interface and this action is sensitive to amino acids. Lack of Thorase causes accumulation of mTOR-Raptor complexes and altered mTORC1 disassembly/re-assembly dynamics upon changes in amino acid availability. The resulting excessive mTORC1 can be counteracted with rapamycin in vitro and in vivo. Collectively, we reveal Thorase as a key component of the mTOR pathway that disassembles and thus inhibits mTORC1.
Signaling via the mTOR complex 1 (mTORC1) maintains cellular and organismal homeostasis. Here the authors show that the AAA + ATPase Thorase binds mTOR to promote disassembly and inactivation of mTORC1 to fine tune TOR signaling according to amino acid availability.
