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The Nucleolus pp 281-299 | Cite as

The Role of the Nucleolus in the Stress Response

  • Laura A. Tollini
  • Rebecca A. Frum
  • Yanping Zhang
Chapter
Part of the Protein Reviews book series (PRON, volume 15)

Abstract

The TP53 tumor suppressor gene and its protein product p53, play a critical role in the cellular stress response. Upon exposure to stressors, such as DNA damage, oncogene activation, or perturbations to the ribosome biogenesis, p53 is activated and is capable of inducing cell cycle arrest, apoptosis, or senescence via the transactivation of genes such as p21, Noxa, Bax, Puma, and GADD45. While p53 expression, and activity, is integral to the cellular stress response, overexpression of p53 is inhibitory to embryonic development, illustrating the importance of proper p53 regulation. Growing evidence has implicated the nucleolus, as well as nucleolar proteins, in the regulation of both p53 and its primary negative regulator Mdm2. The role of nucleolar proteins, including ARF, B23/NPM, and ribosomal proteins, in mediating the p53 stress response serves to link the cell cycle progression and protein synthesis, and suggests p53 is a common regulator capable of coordinating these processes to best maintain the genetic integrity of the cell.

Keywords

Cell Cycle Arrest Murine Double Minute Cellular Stress Response Nucleolar Protein Ring Finger Domain 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

We thank Koji Itahana and Chad Deisenroth for figure art. We apologize for not being able to cite all of the relevant papers due to limited space. The work is supported in part by grants from The Leukemia & Lymphoma Society, The American Cancer Society, and The National Institute of Health.

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Copyright information

© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Laura A. Tollini
    • 1
  • Rebecca A. Frum
    • 2
  • Yanping Zhang
    • 3
    • 4
  1. 1.Curriculum in Genetics and Molecular BiologyUniversity of North Carolina at Chapel HillChapel HillUSA
  2. 2.Department of Radiation OncologyUniversity of North Carolina at Chapel HillChapel HillUSA
  3. 3.Departments of Radiation Oncology and PharmacologyUniversity of North Carolina at Chapel HillChapel HillUSA
  4. 4.Lineberger Comprehensive Cancer CenterUniversity of North Carolina at Chapel HillChapel HillUSA

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