Cited by 154Cancer, Hypoxia, and MetabolismPI3K/AKT/mTOR signaling in cancerAmino Acid Enzymes and Metabolism

The B55α Subunit of PP2A Drives a p53-Dependent Metabolic Adaptation to Glutamine Deprivation

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Reid, Michael A., Wang, Wen-I, Rosales, Kimberly Romero, Welliver, Meng Xu, Pan, Min, Kong, Mei·2013·Molecular Cell

Abstract

Glutamine is an essential nutrient for cancer cell survival and proliferation, yet the signaling pathways that sense glutamine levels remain uncharacterized. Here, we report that the protein phosphatase 2A (PP2A)-associated protein, α4, plays a conserved role in glutamine sensing. α4 promotes assembly of an adaptive PP2A complex containing the B55α regulatory subunit via providing the catalytic subunit upon glutamine deprivation. Moreover, B55α is specifically induced upon glutamine deprivation in a ROS-dependent manner to activate p53 and promote cell survival. B55α activates p53 through direct interaction and dephosphorylation of EDD, a negative regulator of p53. Importantly, the B55α-EDD-p53 pathway is essential for cancer cell survival and tumor growth under low glutamine conditions in vitro and in vivo. This study delineates a previously unidentified signaling pathway that senses glutamine levels as well as provides important evidence that protein phosphatase complexes are actively involved in signal transduction.

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Crossref · 10.1016/j.molcel.2013.02.008

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  • Upon glutamine starvation, p53 activity is induced and can help cancer cells adapt to nutrient starvation.

    “Upon glutamine starvation, p53 activity is induced and can help cancer cells adapt to nutrient starvation through diverse mechanisms148.”

    From Glutamine reliance in cell metabolism (2020) · cites this paper as [148]

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Authors
Reid, M. A., Wang, W.-I., Rosales, K. R., Welliver, M. X., Pan, M., & Kong, M.
Affiliations
  • City Of Hope National Medical Center (US)
  • The Ohio State University Comprehensive Cancer Center – Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (US)
Corresponding author
Kong, Mei
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2013-04
Volume
50
Issue
2
Pages
200-211
ISSN
1097-2765 (ISSN-L)
OpenAlex
W1976712030
Cited by
154
References
30
Citations by year
2026: 4 · 2025: 5 · 2024: 5 · 2023: 8 · 2022: 16 · 2021: 13 · 2020: 19 · 2019: 13 · 2018: 11 · 2017: 12 · 2016: 14 · 2015: 13 · 2014: 12 · 2013: 9
FWCI
5.60
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Sidney Kimmel Foundation for Cancer Research
  • Stop Cancer
  • Stand Up To Cancer (SU2C-AACR-IRG0411)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Amino Acid Enzymes and Metabolism
Keywords
protein phosphatase 2A, glutamine deprivation, p53 activation, EdD, reactive oxygen species, tumor cell survival, tumor growth
MeSH terms
Adaptation, Physiological, Animals, Cell Survival, Glutamine, Humans, Male, Mice, Nude, Neoplasm Transplantation, Neoplasms, Experimental, Phosphoproteins, Stress, Physiological, Signal Transduction, Transcriptional Activation, Gene Expression, Tumor Suppressor Protein p53, Reactive Oxygen Species, Molecular Chaperones, Catalytic Domain, Protein Subunits, RNA, Small Interfering, Intercellular Signaling Peptides and Proteins, NIH 3T3 Cells, Ubiquitin-Protein Ligases, Cell Line, Tumor, Tumor Burden, Adaptor Proteins, Signal Transducing, Cell Proliferation, Mice, Protein Phosphatase 2, Protein Multimerization, Gene Knockdown Techniques, HEK293 Cells

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