Cited by 131PI3K/AKT/mTOR signaling in cancerMetabolism, Diabetes, and CancerProtein Kinase Regulation and GTPase Signaling

PP2A regulatory subunit PP2A-B' counteracts S6K phosphorylation

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Hahn, Katrin, Miranda, Merce, Francis, Víctor A., Vendrell, Joan, Zorzano, Antonio, Teleman, Aurelio A.·2010·Cell Metabolism

Abstract

The insulin/TOR signaling pathway plays a crucial role in animal homeostasis, sensing nutrient status to regulate organismal growth and metabolism. We identify here the Drosophila B' regulatory subunit of PP2A (PP2A-B') as a novel, conserved component of the insulin pathway that specifically targets the PP2A holoenzyme to dephosphorylate S6K. PP2A-B' knockout flies have elevated S6K phosphorylation and exhibit phenotypes typical of elevated insulin signaling such as reduced total body triglycerides and reduced longevity. We show that PP2A-B' interacts with S6K both physically and genetically. The human homolog of PP2A-B', PPP2R5C, also counteracts S6K1 phosphorylation, indicating a conserved mechanism in mammals. Since S6K affects development of cancer and metabolic disease, our data identify PPP2R5C as a novel factor of potential medical relevance.

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Crossref · 10.1016/j.cmet.2010.03.015

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Authors
Hahn, K., Miranda, M., Francis, V. A., Vendrell, J., Zorzano, A., & Teleman, A. A.
Affiliations
  • German Cancer Research Center (DE)
  • Centro de Investigación Biomédica en Red Diabetes y Enfermedades Metabólicas Asociadas (ES)
Corresponding author
Teleman, Aurelio A.
Venue
Cell Metabolism
Publisher
Elsevier BV
Published
2010-05
Volume
11
Issue
5
Pages
438-444
ISSN
1550-4131 (ISSN-L)
OpenAlex
W2061893502
Cited by
131
References
30
Citations by year
2026: 5 · 2025: 6 · 2024: 5 · 2023: 9 · 2022: 11 · 2021: 9 · 2020: 9 · 2019: 7 · 2018: 5 · 2017: 11 · 2016: 12 · 2015: 10 · 2014: 11 · 2013: 6 · 2012: 9
FWCI
2.73
Type
journal article
Language
en
Open access
Locations
  • Cell Metabolism (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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
protein phosphatase 2A, S6K phosphorylation, S6K1, PPP2R5C, protein dephosphorylation, Drosophila, longevity, triglycerides, TOR signaling, protein-protein interaction
MeSH terms
Animals, Drosophila, Humans, Insulin, Longevity, Phosphoprotein Phosphatases, Phosphorylation, Triglycerides, Signal Transduction, Drosophila Proteins, Ribosomal Protein S6 Kinases, 70-kDa, Protein Phosphatase 2, Gene Knockout Techniques

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