Cited by 1,555PI3K/AKT/mTOR signaling in cancerTuberous Sclerosis Complex ResearchMetabolism, Diabetes, and Cancer

Identification of the tuberous sclerosis complex-2 tumor suppressor gene product tuberin as a target of the phosphoinositide 3-kinase/akt pathway

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Manning, Brendan D, Tee, Andrew R, Logsdon, M.Nicole, Blenis, John, Cantley, Lewis C·2002·Molecular Cell

Abstract

The S/T-protein kinases activated by phosphoinositide 3-kinase (PI3K) regulate a myriad of cellular processes. Here, we show that an approach using a combination of biochemistry and bioinformatics can identify substrates of these kinases. This approach identifies the tuberous sclerosis complex-2 gene product, tuberin, as a potential target of Akt/PKB. We demonstrate that, upon activation of PI3K, tuberin is phosphorylated on consensus recognition sites for PI3K-dependent S/T kinases. Moreover, Akt/PKB can phosphorylate tuberin in vitro and in vivo. We also show that S939 and T1462 of tuberin are PI3K-regulated phosphorylation sites and that T1462 is constitutively phosphorylated in PTEN(-/-) tumor-derived cell lines. Finally, we find that a tuberin mutant lacking the major PI3K-dependent phosphorylation sites can block the activation of S6K1, suggesting a means by which the PI3K-Akt pathway regulates S6K1 activity.

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Crossref · 10.1016/s1097-2765(02)00568-3

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Authors
Manning, B. D., Tee, A. R., Logsdon, M. N., Blenis, J., & Cantley, L. C.
Affiliations
  • Beth Israel Deaconess Medical Center (US)
  • Harvard University (US)
Corresponding author
Cantley, Lewis C
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2002-07
Volume
10
Issue
1
Pages
151-162
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2094941511
Cited by
1,555
References
57
Citations by year
2026: 15 · 2025: 26 · 2024: 34 · 2023: 44 · 2022: 54 · 2021: 53 · 2020: 63 · 2019: 50 · 2018: 48 · 2017: 73 · 2016: 67 · 2015: 68 · 2014: 71 · 2013: 89 · 2012: 95
FWCI
25.84
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of General Medical Sciences (GM 41890, GM51405, R01GM056203, GM 56203, R01GM051405, R01GM041890)
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 › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
tuberin, tuberous sclerosis complex 2, phosphatidylinositol 3-kinase, Akt, protein phosphorylation, kinase substrate identification
MeSH terms
Tuberous Sclerosis Complex 2 Protein, Amino Acid Sequence, Animals, Binding Sites, Cell Line, Enzyme Activation, Humans, Molecular Weight, Mutation, Phosphoric Monoester Hydrolases, Phosphorylation, Proto-Oncogene Proteins, Repressor Proteins, Substrate Specificity, Tuberous Sclerosis, Tumor Cells, Cultured, Signal Transduction, 3T3 Cells, Protein Serine-Threonine Kinases, Gene Deletion, Phosphatidylinositol 3-Kinases, Ribosomal Protein S6 Kinases, Tumor Suppressor Proteins, Proto-Oncogene Proteins c-akt, PTEN Phosphohydrolase, Mice

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