Cited by 237PI3K/AKT/mTOR signaling in cancerMetabolism, Diabetes, and CancerAutophagy in Disease and Therapy

The Stress-inducted Proteins RTP801 and RTP801L Are Negative Regulators of the Mammalian Target of Rapamycin Pathway

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Corradetti, Michael N., Inoki, Ken, Guan, Kun-Liang·2005·Journal of Biological Chemistry

Abstract

The mammalian target of rapamycin (mTOR) is a serine/threonine kinase that plays an essential role in cell growth control. mTOR stimulates cell growth by phosphorylating p70 ribosomal S6 kinase (S6K) and eukaryote initiation factor 4E-binding protein 1 (4EBP1). The mTOR pathway is regulated by a wide variety of cellular signals, including mitogenic growth factors, nutrients, cellular energy levels, and stress conditions. Recent studies have proposed several mechanisms to explain how mTOR is regulated by growth factors and cellular energy levels. However, little is known as to how mTOR is regulated by stress conditions. We observed that two stress-induced proteins, RTP801/Redd1 and RTP801L/Redd2, potently inhibit signaling through mTOR. Our data support that RTP801 and RTP801L work downstream of AKT and upstream of TSC2 to inhibit mTOR functions. These results add a new dimension to mTOR pathway regulation and provide a possible molecular mechanism of how cellular stress conditions may regulate mTOR function.

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Authors
Corradetti, M. N., Inoki, K., & Guan, K.-L.
Affiliations
University of Michigan (US)
Corresponding author
Guan, Kun-Liang
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2005-03
Volume
280
Issue
11
Pages
9769-9772
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2093341871
Cited by
237
References
37
Citations by year
2026: 5 · 2025: 8 · 2024: 3 · 2023: 3 · 2022: 4 · 2021: 9 · 2020: 7 · 2019: 5 · 2018: 5 · 2017: 8 · 2016: 11 · 2015: 18 · 2014: 17 · 2013: 14 · 2012: 16
FWCI
5.98
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
Eunice Kennedy Shriver National Institute of Child Health and Human Development (5-T32-HD075005)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
  • Health Sciences › Medicine › Epidemiology › Autophagy in Disease and Therapy
Keywords
mTOR signaling, RTP801, REDD1, stress proteins, Akt, TSC2, p70 S6 kinase, 4E-BP1, cell growth regulation, cellular stress
MeSH terms
Animals, Hypoxia, Cell Line, DNA Damage, DNA-Binding Proteins, Gene Expression Regulation, Glucocorticoids, Humans, Models, Biological, Phosphorylation, Protein Kinases, Proteins, Retroviridae, Transcription Factors, Transfection, Protein Biosynthesis, RNA Interference, RNA, Small Interfering, Immunoprecipitation, Adaptor Proteins, Signal Transducing, Mice, TOR Serine-Threonine Kinases

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