Acetyltransferase GCN5 regulates autophagy and lysosome biogenesis by targeting TFEB.

Abstract:

:Accumulating evidence highlights the role of histone acetyltransferase GCN5 in the regulation of cell metabolism in metazoans. Here, we report that GCN5 is a negative regulator of autophagy, a lysosome-dependent catabolic mechanism. In animal cells and Drosophila, GCN5 inhibits the biogenesis of autophagosomes and lysosomes by targeting TFEB, the master transcription factor for autophagy- and lysosome-related gene expression. We show that GCN5 is a specific TFEB acetyltransferase, and acetylation by GCN5 results in the decrease in TFEB transcriptional activity. Induction of autophagy inactivates GCN5, accompanied by reduced TFEB acetylation and increased lysosome formation. We further demonstrate that acetylation at K274 and K279 disrupts the dimerization of TFEB and the binding of TFEB to its target gene promoters. In a Tau-based neurodegenerative Drosophila model, deletion of dGcn5 improves the clearance of Tau protein aggregates and ameliorates the neurodegenerative phenotypes. Together, our results reveal GCN5 as a novel conserved TFEB regulator, and the regulatory mechanisms may be involved in autophagy- and lysosome-related physiological and pathological processes.

journal_name

EMBO Rep

journal_title

EMBO reports

authors

Wang Y,Huang Y,Liu J,Zhang J,Xu M,You Z,Peng C,Gong Z,Liu W

doi

10.15252/embr.201948335

subject

Has Abstract

pub_date

2020-01-07 00:00:00

pages

e48335

issue

1

eissn

1469-221X

issn

1469-3178

journal_volume

21

pub_type

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