THOC4 regulates energy homeostasis by stabilizing TFEB mRNA during prolonged starvation
- 15 March 2021
- journal article
- research article
- Published by The Company of Biologists in Journal of Cell Science
- Vol. 134 (6)
- https://doi.org/10.1242/jcs.248203
Abstract
TFEB, a bHLH transcription factor, is a master regulator of autophagy, lysosome biogenesis, and lipid catabolism. Compared to the post-translational regulation, the regulation of TFEB mRNA stability remains relatively uncharacterized. In this study, we identified the mRNA-binding protein THOC4 as a novel regulator of TFEB. In mammalian cells, siRNA-mediated knockdown of THOC4 decreased the level of TFEB protein to a greater extent than other bHLH transcription factors. THOC4 bound to TFEB mRNA and stabilized it after transcription through maintaining polyA length. We further found that this mode of regulation was conserved in C. elegans and was essential for TFEB mediated lipid break-down which becomes overrepresented during prolonged starvation. Taken together our study reveals the presence of an additional layer of TFEB regulation by THOC4 and provide novel insights into the function TFEB mediating autophagy and lipid metabolism.Keywords
Funding Information
- Japan Science and Technology Agency (JPMJCR17H6)
- Japan Agency for Medical Research and Development (17gm6110003h0001, JP17gm5010001)
- Japan Society for the Promotion of Science
- Senri Life Science Foundation
- Takeda Science Foundation
- MSD Life Science Foundation, Public Interest Incorporated Foundation
- Astellas Foundation for Research on Metabolic Disorders
- Mochida Memorial Foundation for Medical and Pharmaceutical Research
- Human Frontier Science Program
- The Nakajima Foundation
This publication has 45 references indexed in Scilit:
- Atg9A trafficking through the recycling endosomes is required for autophagosome formationJournal of Cell Science, 2016
- BRD4 assists elongation of both coding and enhancer RNAs by interacting with acetylated histonesNature Structural & Molecular Biology, 2014
- The machinery of macroautophagyCell Research, 2013
- Recruitment of the autophagic machinery to endosomes during infection is mediated by ubiquitinThe Journal of cell biology, 2013
- SnapShot: Selective AutophagyCell, 2013
- Selective degradation of p62 by autophagySeminars in Immunopathology, 2010
- UIF, a New mRNA Export Adaptor that Works Together with REF/ALY, Requires FACT for Recruitment to mRNACurrent Biology, 2009
- RNA Quality Control in EukaryotesCell, 2007
- LC3, a mammalian homologue of yeast Apg8p, is localized in autophagosome membranes after processingThe EMBO Journal, 2000
- ALY, a context-dependent coactivator of LEF-1 and AML-1, is required for TCRalpha enhancer function.Genes & Development, 1997