Downregulation of autophagy through CUL3-KLHL20-mediated turnover of the ULK1 and PIK3C3/VPS34 complexes.
The molecular mechanism of macroautophagy/autophagy induction has been intensively studied, but little is known about downregulation of autophagy and how this process is restricted. In particular, how is autophagy maintained at an appropriate homeostatic level when cells are subjected to prolonged stress? In this study (see the related punctum in Autophagy 12-5), Liu et al. report a function of the CUL3-KLHL20 ubiquitin ligase in feedback regulation, leading to the downregulation of autophagy through the degradation of the ULK1 and PIK3C3/VPS34 complexes.
a Life Sciences Institute and Department of Molecular, Cellular, and Developmental Biology, University of Michigan , Ann Arbor , MI , USA.
Yuchen
Y
Feng
a Life Sciences Institute and Department of Molecular, Cellular, and Developmental Biology, University of Michigan , Ann Arbor , MI , USA.
Daniel J
DJ
Klionsky
D048868:Adaptor Proteins, Signal Transducing; D000818:Animals; D051017:Apoptosis Regulatory Proteins / Q000378:metabolism*; D001343:Autophagy / Q000502:physiology*; D002352:Carrier Proteins / Q000378:metabolism; D058546:Class III Phosphatidylinositol 3-Kinases / Q000378:metabolism*; D044842:Cullin Proteins / Q000378:metabolism; D015536:Down-Regulation; D006706:Homeostasis / Q000502:physiology*; D006801:Humans; D011485:Protein Binding; D025801:Ubiquitin / Q000378:metabolism*
D048868:Adaptor Proteins, Signal Transducing; D051017:Apoptosis Regulatory Proteins; C503645:CUL3 protein, human; D002352:Carrier Proteins; D044842:Cullin Proteins; C550011:KLHL20 protein, human; D025801:Ubiquitin; D058546:Class III Phosphatidylinositol 3-Kinases
autophagy; lysosome; stress; ubiquitin; vacuole