Cited by 252Autophagy in Disease and TherapyProtein Degradation and InhibitorsCalcium signaling and nucleotide metabolism

Bromodomain Protein BRD4 Is a Transcriptional Repressor of Autophagy and Lysosomal Function

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Sakamaki, Jun-ichi, Wilkinson, Simon, Hahn, Marcel, Tasdemir, Nilgun, O’Prey, Jim, Clark, William, Hedley, Ann, Nixon, Colin +7 more·2017·Molecular Cell

Abstract

Autophagy is a membrane-trafficking process that directs degradation of cytoplasmic material in lysosomes. The process promotes cellular fidelity, and while the core machinery of autophagy is known, the mechanisms that promote and sustain autophagy are less well defined. Here we report that the epigenetic reader BRD4 and the methyltransferase G9a repress a TFEB/TFE3/MITF-independent transcriptional program that promotes autophagy and lysosome biogenesis. We show that BRD4 knockdown induces autophagy in vitro and in vivo in response to some, but not all, situations. In the case of starvation, a signaling cascade involving AMPK and histone deacetylase SIRT1 displaces chromatin-bound BRD4, instigating autophagy gene activation and cell survival. Importantly, this program is directed independently and also reciprocally to the growth-promoting properties of BRD4 and is potently repressed by BRD4-NUT, a driver of NUT midline carcinoma. These findings therefore identify a distinct and selective mechanism of autophagy regulation.

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Crossref · 10.1016/j.molcel.2017.04.027

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Authors
Sakamaki, J.-I., Wilkinson, S., Hahn, M., Tasdemir, N., O’Prey, J., Clark, W., Hedley, A., Nixon, C., Long, J. S., New, M., Van Acker, T., Tooze, S. A., Lowe, S. W., Dikic, I., & Ryan, K. M.
Affiliations
  • Cancer Research UK Scotland Institute (GB)
  • Goethe University Frankfurt (DE)
  • Memorial Sloan Kettering Cancer Center (US)
  • The Francis Crick Institute (GB)
Corresponding author
Ryan, Kevin M.
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2017-05
Volume
66
Issue
4
Pages
517-532.e9
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2614434863
Cited by
249
References
64
Citations by year
2026: 21 · 2025: 21 · 2024: 22 · 2023: 29 · 2022: 32 · 2021: 41 · 2020: 34 · 2019: 22 · 2018: 22 · 2017: 5
FWCI
18.00
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (acceptedVersion)
  • Figshare (submittedVersion, cc-by)
  • Publication Server of Goethe University Frankfurt am Main (Goethe University Frankfurt) (submittedVersion, cc-by)
  • Edinburgh Research Explorer (University of Edinburgh) (submittedVersion, cc-by)
Funders
  • Cancer Research UK
  • Astellas Pharma
  • Worldwide Cancer Research
Topics
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Calcium signaling and nucleotide metabolism
Keywords
BRD4, autophagy, lysosomal biogenesis, transcriptional repression, epigenetic reader protein, G9a, histone methyltransferase, starvation, AMPK, SIRT1, histone deacetylase, NUT midline carcinoma, chromatin binding, cell survival
MeSH terms
Bromodomain Containing Proteins, Animals, Autophagy, Chromatin, Drosophila melanogaster, Energy Metabolism, Histocompatibility Antigens, Humans, Lysosomes, Mice, Inbred C57BL, Mice, Transgenic, Nuclear Proteins, Pancreatic Neoplasms, Protein Binding, Histone-Lysine N-Methyltransferase, Time Factors, Transcription Factors, Transcription, Genetic, Transfection, Signal Transduction, Oncogene Proteins, Fusion, Down-Regulation, Gene Expression Regulation, Neoplastic, Cell Cycle Proteins, Carcinoma, Pancreatic Ductal, Drosophila Proteins, RNA Interference, Cell Line, Tumor, Cell Proliferation, AMP-Activated Protein Kinases, Sirtuin 1, HEK293 Cells, TOR Serine-Threonine Kinases, Proteolysis, Protein Aggregates

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