Cited by 705Cancer, Hypoxia, and MetabolismCancer-related Molecular PathwaysRedox biology and oxidative stress

Phosphate-activated glutaminase (GLS2), a p53-inducible regulator of glutamine metabolism and reactive oxygen species

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Suzuki, Sawako, Tanaka, Tomoaki, Poyurovsky, Masha V., Nagano, Hidekazu, Mayama, Takafumi, Ohkubo, Shuichi, Lokshin, Maria, Hosokawa, Hiroyuki +8 more·2010·Proceedings of the National Academy of Sciences

Abstract

We identified a p53 target gene, phosphate-activated mitochondrial glutaminase (GLS2), a key enzyme in conversion of glutamine to glutamate, and thereby a regulator of glutathione (GSH) synthesis and energy production. GLS2 expression is induced in response to DNA damage or oxidative stress in a p53-dependent manner, and p53 associates with the GLS2 promoter. Elevated GLS2 facilitates glutamine metabolism and lowers intracellular reactive oxygen species (ROS) levels, resulting in an overall decrease in DNA oxidation as determined by measurement of 8-OH-dG content in both normal and stressed cells. Further, siRNA down-regulation of either GLS2 or p53 compromises the GSH-dependent antioxidant system and increases intracellular ROS levels. High ROS levels following GLS2 knockdown also coincide with stimulation of p53-induced cell death. We propose that GLS2 control of intracellular ROS levels and the apoptotic response facilitates the ability of p53 to protect cells from accumulation of genomic damage and allows cells to survive after mild and repairable genotoxic stress. Indeed, overexpression of GLS2 reduces the growth of tumor cells and colony formation. Further, compared with normal tissue, GLS2 expression is reduced in liver tumors. Thus, our results provide evidence for a unique metabolic role for p53, linking glutamine metabolism, energy, and ROS homeostasis, which may contribute to p53 tumor suppressor function.

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Crossref · 10.1073/pnas.1002459107

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  • GLS2 catalyzes the hydrolysis of glutamine to glutamate and ammonia and is encoded by a direct p53 target gene.

    “GLS2 catalyzes the hydrolysis of glutamine to glutamate and ammonia and is encoded by a direct p53 target gene.197, 198”

    From Census and evaluation of p53 target genes (2017) · cites this paper as [197]

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Authors
Suzuki, S., Tanaka, T., Poyurovsky, M. V., Nagano, H., Mayama, T., Ohkubo, S., Lokshin, M., Hosokawa, H., Nakayama, T., Suzuki, Y., Sugano, S., Sato, E., Nagao, T., Yokote, K., Tatsuno, I., & Prives, C.
Affiliations
  • Chiba University (JP)
  • Columbia University (US)
  • Taiho Pharmaceutical (Japan) (JP)
  • The University of Tokyo (JP)
  • Tokyo Medical University (JP)
Venue
Proceedings of the National Academy of Sciences
Published
2010-03-29
Volume
107
Issue
16
Pages
7461-7466
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2083659501
Cited by
705
References
36
Citations by year
2026: 32 · 2025: 43 · 2024: 47 · 2023: 48 · 2022: 46 · 2021: 54 · 2020: 39 · 2019: 40 · 2018: 33 · 2017: 46 · 2016: 35 · 2015: 46 · 2014: 62 · 2013: 43 · 2012: 51
FWCI
13.49
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Takeda Science Foundation
  • Sumitomo Foundation
  • Tokyo Biochemical Research Foundation
  • Ministry of Education, Culture, Sports, Science and Technology (#19659121, 21390147, 17016010)
  • Japan Diabetes Foundation
  • National Institutes of Health (CA87497)
  • Japan Society for the Promotion of Science (21390147)
  • National Cancer Institute (CA-87497, P01CA087497, R01CA077742, CA77742)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Redox biology and oxidative stress
Keywords
GLS2, phosphate-activated glutaminase, p53, glutamine metabolism, glutamate, glutathione synthesis, reactive oxygen species, DNA damage, oxidative stress, DNA oxidation, p53 target genes, tumor suppressor function, liver tumors, energy metabolism
MeSH terms
Animals, Antioxidants, Glutaminase, Glutamine, Glutathione, Humans, Mitochondria, Promoter Regions, Genetic, Tumor Suppressor Protein p53, Apoptosis, Reactive Oxygen Species, Oligonucleotide Array Sequence Analysis, RNA Interference, Mice

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