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Malik, Nazma; Ferreira, Bibiana I; Hollstein, Pablo E; Curtis, Stephanie D; Trefts, Elijah; Weiser Novak, Sammy; Yu, Jingting; Gilson, Rebecca; Hellberg, Kristina; Fang, Lingjing; Sheridan, Arlo; Hah, Nasun; Shadel, Gerald S; Manor, Uri; Shaw, Reuben J
Science (American Association for the Advancement of Science), 04/2023, Letnik: 380, Številka: 6642Journal Article
Cells respond to mitochondrial poisons with rapid activation of the adenosine monophosphate-activated protein kinase (AMPK), causing acute metabolic changes through phosphorylation and prolonged adaptation of metabolism through transcriptional effects. Transcription factor EB (TFEB) is a major effector of AMPK that increases expression of lysosome genes in response to energetic stress, but how AMPK activates TFEB remains unresolved. We demonstrate that AMPK directly phosphorylates five conserved serine residues in folliculin-interacting protein 1 (FNIP1), suppressing the function of the folliculin (FLCN)-FNIP1 complex. FNIP1 phosphorylation is required for AMPK to induce nuclear translocation of TFEB and TFEB-dependent increases of peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC1α) and estrogen-related receptor alpha (ERRα) messenger RNAs. Thus, mitochondrial damage triggers AMPK-FNIP1-dependent nuclear translocation of TFEB, inducing sequential waves of lysosomal and mitochondrial biogenesis.
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in: SICRIS
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