Cited by 1,237PI3K/AKT/mTOR signaling in cancerTuberous Sclerosis Complex ResearchHippo pathway signaling and YAP/TAZ

The TSC1–TSC2 complex: a molecular switchboard controlling cell growth

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Huang, Jingxiang, Manning, Brendan D.·2008·Biochemical Journal

Abstract

TSC1 and TSC2 are the tumour-suppressor genes mutated in the tumour syndrome TSC (tuberous sclerosis complex). Their gene products form a complex that has become the focus of many signal transduction researchers. The TSC1–TSC2 (hamartin–tuberin) complex, through its GAP (GTPase-activating protein) activity towards the small G-protein Rheb (Ras homologue enriched in brain), is a critical negative regulator of mTORC1 (mammalian target of rapamycin complex 1). As mTORC1 activity controls anabolic processes to promote cell growth, it is exquisitely sensitive to alterations in cell growth conditions. Through numerous phosphorylation events, the TSC1–TSC2 complex has emerged as the sensor and integrator of these growth conditions, relaying signals from diverse cellular pathways to properly modulate mTORC1 activity. In the present review we focus on the molecular details of TSC1–TSC2 complex regulation and function as it relates to the control of Rheb and mTORC1.

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  • Whereas specific metabolites signal to mTORC1 through the Rag GTPase axis, stress conditions such as hypoxia, DNA damage stress, ER stress, and growth factor and survival signaling are filtered through to the Rheb GTPase through TSCC by post-translational modification.

    “Whereas it appears that specific metabolites signal to mTORC1 through the Rag GTPase axis, stress conditions such as hypoxia, DNA damage stress, ER stress, and growth factor and survival signaling, are filtered through to the Rheb GTPase through TSCC by post-translational modification (Kwiatkowski, 2003; Huang and Manning, 2008; Tomasoni and Mondino, 2011; Demetriades et al., 2016).”

    From Signal integration in the (m)TORC1 growth pathway (2018) · cites this paper as Huang and Manning, 2008

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Authors
Huang, J., & Manning, B. D.
Affiliations
Harvard University (US)
Venue
Biochemical Journal
Published
2008-05-14
Volume
412
Issue
2
Pages
179-190
ISSN
  • 0264-6021 (ISSN-L)
  • 1470-8728
OpenAlex
W1993431258
Cited by
1,237
References
133
Citations by year
2026: 26 · 2025: 58 · 2024: 53 · 2023: 62 · 2022: 77 · 2021: 83 · 2020: 77 · 2019: 69 · 2018: 74 · 2017: 79 · 2016: 68 · 2015: 82 · 2014: 70 · 2013: 72 · 2012: 73
FWCI
5.48
Type
journal article
Language
en
Open access
Locations
  • Biochemical Journal (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Cancer Institute (R01CA122617, P01CA120964)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Health Sciences › Medicine › Physiology › Tuberous Sclerosis Complex Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hippo pathway signaling and YAP/TAZ
Keywords
TSC1/TSC2 complex, hamartin, tuberin, tuberous sclerosis complex, Rheb, GTPase-activating protein, mTORC1, cell growth regulation, signal transduction, phosphorylation, anabolic processes, tumor suppressor
MeSH terms
Ras Homolog Enriched in Brain Protein, Tuberous Sclerosis Complex 1 Protein, Tuberous Sclerosis Complex 2 Protein, Amino Acid Sequence, Animals, Cell Cycle, Humans, Insulin, Insulin-Like Growth Factor I, Molecular Sequence Data, Neuropeptides, Protein Kinases, Transcription Factors, Signal Transduction, Genes, Tumor Suppressor, Sequence Alignment, Ribosomal Protein S6 Kinases, Monomeric GTP-Binding Proteins, Tumor Suppressor Proteins, Intercellular Signaling Peptides and Proteins, Cell Growth Processes, TOR Serine-Threonine Kinases

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