Cited by 105Cancer-related Molecular PathwaysDNA Repair MechanismsHeat shock proteins research

ATM Phosphorylation of Mdm2 Ser394 Regulates the Amplitude and Duration of the DNA Damage Response in Mice

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Gannon, Hugh S., Woda, Bruce A., Jones, Stephen N.·2012·Cancer Cell

Abstract

DNA damage induced by ionizing radiation activates the ATM kinase, which subsequently stabilizes and activates the p53 tumor suppressor protein. Although phosphorylation of p53 by ATM was found previously to modulate p53 levels and transcriptional activities in vivo, it does not appear to be a major regulator of p53 stability. We have utilized mice bearing altered Mdm2 alleles to demonstrate that ATM phosphorylation of Mdm2 serine 394 is required for robust p53 stabilization and activation after DNA damage. In addition, we demonstrate that dephosphorylation of Mdm2 Ser394 regulates attenuation of the p53-mediated response to DNA damage. Therefore, the phosphorylation status of Mdm2 Ser394 governs p53 protein levels and functions in cells undergoing DNA damage.

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Crossref · 10.1016/j.ccr.2012.04.011

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  • Mutation of Ser394 to alanine in mouse MDM2 in vivo removes an ATM phosphorylation site, engenders radioresistance and increases the rate of spontaneous tumorigenesis to that observed in Trp53-hemizygous animals.

    “By contrast, the mutation of Ser394 to alanine (Ser394Ala) in mouse MDM2 in vivo removes an ATM phosphorylation site, engenders radioresistance and increases the rate of spontaneous tumorigenesis to that observed in Trp53-hemizygous animals47.”

    From MDM2, MDMX and p53 in oncogenesis and cancer therapy (2013) · cites this paper as [47]

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Authors
Gannon, H. S., Woda, B. A., & Jones, S. N.
Affiliations
University of Massachusetts Chan Medical School (US)
Corresponding author
Jones, Stephen N.
Venue
Cancer Cell
Publisher
Elsevier BV
Published
2012-05
Volume
21
Issue
5
Pages
668-679
ISSN
1535-6108 (ISSN-L)
OpenAlex
W2117932700
Cited by
105
References
48
Citations by year
2026: 7 · 2025: 1 · 2024: 5 · 2023: 3 · 2022: 4 · 2021: 9 · 2020: 7 · 2019: 9 · 2018: 10 · 2017: 5 · 2016: 13 · 2015: 4 · 2014: 11 · 2013: 10 · 2012: 6
FWCI
4.90
Type
journal article
Language
en
Open access
Locations
  • Cancer Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • The Journal of the American Medical Association (JAMA) Network (American Medical Association) (submittedVersion)
Funders
  • National Institute of Diabetes and Digestive and Kidney Diseases (CA077735)
  • National Cancer Institute
Topics
  • Health Sciences › Medicine › Oncology › Cancer-related Molecular Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › DNA Repair Mechanisms
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Heat shock proteins research
Keywords
ATM kinase, MDM2, p53 stabilization, DNA damage response, ionizing radiation, p53 activation
MeSH terms
Animals, DNA Damage, DNA-Binding Proteins, Enzyme Activation, Intestine, Small, Mice, Inbred C57BL, Phosphorylation, Radiation Tolerance, Serine, Spleen, Thymus Gland, Time Factors, Tumor Suppressor Protein p53, Apoptosis, Protein Serine-Threonine Kinases, Cell Cycle Proteins, Mutation, Missense, Tumor Suppressor Proteins, Mice, Proto-Oncogene Proteins c-mdm2, Protein Stability, Mice, 129 Strain, Ataxia Telangiectasia Mutated Proteins

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