Mammalian TOR: a homeostatic ATP sensor
Abstract
The bacterial macrolide rapamycin is an efficacious anticancer agent against solid tumors. In a hypoxic environment, the increase in mass of solid tumors is dependent on the recruitment of mitogens and nutrients. When nutrient concentrations change, particularly those of essential amino acids, the mammalian Target of Rapamycin (mTOR) functions in regulatory pathways that control ribosome biogenesis and cell growth. In bacteria, ribosome biogenesis is independently regulated by amino acids and adenosine triphosphate (ATP). Here we demonstrate that the mTOR pathway is influenced by the intracellular concentration of ATP, independent of the abundance of amino acids, and that mTOR itself is an ATP sensor.
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It is premature to attribute the beneficial effect observed with rapamycin treatment to the stimulatory effect of this drug on macroautophagy, because inhibition of mTOR should also affect other cellular functions.
“it is premature to attribute the beneficial effect observed with the rapamycin treatment to the stimulatory effect of this drug on macroautophagy, because inhibition of this major cellular kinase should also affect other cellular functions such as mRNA translation, ribosome biogenesis, angiogenesis, mitochondrial metabolism, adipogenesis and cellular growth (Dennis et al., 2001)”
From Protein Homeostasis and Aging: the importance of exquisite quality control (2011) · cites this paper as Dennis et al., 2001
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- Authors
- Dennis, P. B., Jaeschke, A., Saitoh, M., Fowler, B., Kozma, S. C., & Thomas, G.
- Affiliations
- Friedrich Miescher Institute (CH)
- University Children’s Hospital Basel (CH)
- Corresponding author
- Thomas, George
- Venue
- Science
- Published
- 2001-11-02
- Volume
- 294
- Issue
- 5544
- Pages
- 1102-1105
- ISSN
- 0036-8075 (ISSN-L)
- 1095-9203
- OpenAlex
- W2008294451
- Cited by
- 962
- References
- 0
- Citations by year
- 2026: 9 · 2025: 18 · 2024: 17 · 2023: 26 · 2022: 23 · 2021: 34 · 2020: 38 · 2019: 30 · 2018: 21 · 2017: 25 · 2016: 31 · 2015: 34 · 2014: 33 · 2013: 54 · 2012: 46
- FWCI
- 21.57
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Science (publishedVersion)
- PubMed (publishedVersion)
- 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, ATP sensing, ribosome biogenesis, amino acid signaling, tumor hypoxia, essential amino acids, cell growth regulation
- MeSH terms
- Wortmannin, Adenosine Triphosphate, Amino Acids, Androstadienes, Carrier Proteins, Cell Line, Deoxyglucose, Enzyme Activation, Homeostasis, Humans, Insulin, Kinetics, Phosphoproteins, Phosphorylation, Protein Kinases, Recombinant Fusion Proteins, Ribosomes, RNA, Transfer, Amino Acyl, Rotenone, Signal Transduction, Cell Cycle Proteins, Ribosomal Protein S6 Kinases, Sirolimus, Adaptor Proteins, Signal Transducing, TOR Serine-Threonine Kinases
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