Cited by 91PI3K/AKT/mTOR signaling in cancerCellular transport and secretionAutophagy in Disease and Therapy

Rheb localized on the Golgi membrane activates lysosome-localized mTORC1 at the Golgi–lysosome contact site

Hao, Feike, Kondo, Kazuhiko, Itoh, Takashi, Ikari, Sumiko, Nada, Shigeyuki, Okada, Masato, Noda, Takeshi·2018·Journal of Cell Science

Abstract

In response to amino acid supply, mTORC1, a master regulator of cell growth, is recruited to the lysosome and activated by the small GTPase Rheb. However, the intracellular localization of Rheb is controversial. In this study, we showed that a significant portion of Rheb is localized on the Golgi but not on the lysosome. GFP–Rheb could activate mTORC1, even when forced to exclusively localize to the Golgi. Likewise, artificial recruitment of mTORC1 to the Golgi allowed its activation. Accordingly, the Golgi was in contact with the lysosome at an newly discovered area of the cell that we term the Golgi–lysosome contact site (GLCS). The number of GLCSs increased in response to amino acid supply, whereas GLCS perturbation suppressed mTORC1 activation. These results suggest that inter-organelle communication between the Golgi and lysosome is important for mTORC1 regulation and the Golgi-localized Rheb may activate mTORC1 at GLCSs.

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Crossref · 10.1242/jcs.208017

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  • There was a very high location similarity between lysosomes and Golgi.

    “We found a very high location similarity between lysosomes and Golgi, consistent with their enrichment in location in the apical cytoplasm and the known role of the Golgi in regulating lysosome localization20,21.”

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Authors
Hao, F., Kondo, K., Itoh, T., Ikari, S., Nada, S., Okada, M., & Noda, T.
Affiliations
  • Center for Frontier Oral Science (JP)
  • The University of Osaka (JP)
  • Research Institute for Microbial Diseases, The University of Osaka (JP)
Corresponding author
Noda, Takeshi
Venue
Journal of Cell Science
Published
2018-01-29
Volume
131
Issue
3
ISSN
  • 0021-9533 (ISSN-L)
  • 1477-9137
OpenAlex
W2772279319
Cited by
91
References
65
Citations by year
2026: 5 · 2025: 4 · 2024: 9 · 2023: 11 · 2022: 19 · 2021: 16 · 2020: 15 · 2019: 9 · 2018: 3
FWCI
3.02
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Cell Science (publishedVersion)
  • PubMed (publishedVersion)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • Japan Society for Promotion of Science (16K07347)
  • Ministry of Education, Culture, Sports, Science and Technology (16H01202)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Cellular transport and secretion
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
Rheb, mTORC1, Golgi apparatus, lysosomes, inter-organelle communication, amino acid signaling, cell growth regulation, GTPase activation
MeSH terms
Ras Homolog Enriched in Brain Protein, Mechanistic Target of Rapamycin Complex 1, Amino Acids, Golgi Apparatus, HeLa Cells, Humans, Intracellular Membranes, Lysosomes, Protein Transport, Green Fluorescent Proteins, HEK293 Cells

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