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Cancers arise due to mutations in genes involved in the regulation of cell division, which leads to unrestricted cell proliferation. Modern science and medicine have made great strides in the understanding and treatment of cancer, including eradicating cancer in some patients. However, there is still no cure for cancer. This is largely due to the fact that cancer is a large group of many diseases.
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Yeast As a Chassis for Developing Functional Assays to Study Human P53
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p53 Isoforms and Their Implications in Cancer.

Maximilian Vieler1, Suparna Sanyal2

  • 1Department of Cell and Molecular Biology, Uppsala University, Box-596, BMC, Uppsala SE-75124, Sweden. max.vieler@gmail.com.

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|August 29, 2018
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Summary

Tumor suppressor protein p53 (TP53) dysfunction causes cancer. N-terminally truncated p53 isoforms, like ∆133p53, may inactivate wild-type p53 through aggregation or dominant-negative effects, contributing to carcinogenesis.

Keywords:
aggregationcancerp53p53 isoformprion∆133p53∆160p53∆40p53

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Area of Science:

  • Molecular Biology
  • Cancer Research
  • Genetics

Background:

  • The tumor suppressor protein p53 is crucial for preventing cancer.
  • Mutations in the TP53 gene are a primary cause of p53 inactivation.
  • Recent findings highlight the increased presence of p53 isoforms in cancerous tissues.

Purpose of the Study:

  • To review the role of major p53 isoforms in cancer development.
  • To explore the mechanisms by which p53 isoforms may contribute to carcinogenesis.
  • To discuss the evolutionary implications of p53 isoforms.

Main Methods:

  • Literature review of studies on p53 isoforms.
  • Analysis of structural and functional data for p53 isoforms.
  • Examination of proposed mechanisms of p53 inactivation by isoforms.

Main Results:

  • N-terminally truncated p53 isoforms (∆40p53, ∆133p53, ∆160p53) are abundant in cancers.
  • These isoforms may exhibit altered DNA binding and function.
  • Potential mechanisms include dominant-negative effects, gain-of-function, tetramerization, and aggregation.

Conclusions:

  • p53 isoforms play a significant role in cancer beyond TP53 mutations.
  • Further research is needed to fully elucidate the functions and mechanisms of p53 isoforms.
  • Understanding p53 isoforms is critical for cancer therapy development.