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- W2896514867 abstract "mTORC1, the major homeostatic sensor and responder, regulates cell catabolism mainly by targeting autophagy. Here, we show that mTORC1 directly controls autophagosome formation via phosphorylation of WIPI2, a critical protein in isolation membrane growth and elongation. mTORC1 phosphorylates Ser395 of WIPI2, directing WIPI2 to interact specifically with the E3 ubiquitin ligase HUWE1 for ubiquitination and proteasomal degradation. Physiological or pharmacological inhibition of mTORC1 in cells promotes WIPI2 stabilization, autophagosome formation, and autophagic degradation. In mouse liver, fasting significantly increases the WIPI2 protein level, while silencing HUWE1 enhances autophagy, and introducing WIPI2 improves lipid clearance. Thus, regulation of the intracellular WIPI2 protein level by mTORC1 and HUWE1 is a key determinant of autophagy flux and may coordinate the initiation, progression, and completion of autophagy." @default.
- W2896514867 created "2018-10-26" @default.
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- W2896514867 date "2018-10-01" @default.
- W2896514867 modified "2023-10-17" @default.
- W2896514867 title "mTORC1-Regulated and HUWE1-Mediated WIPI2 Degradation Controls Autophagy Flux" @default.
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- W2896514867 doi "https://doi.org/10.1016/j.molcel.2018.09.017" @default.
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