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Yeast As a Chassis for Developing Functional Assays to Study Human P53
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[Structural-functional diversity of p53 proteoforms].

S N Naryzhny1, O K Legina1

  • 1Petersburg Nuclear Physics Institute NRC Kurchatov Institute, Leningrad region, Gatchina, Russia.

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Summary

The tumor suppressor protein p53, crucial in preventing cancer, exists as diverse proteoforms. These variants, generated through various genetic mechanisms, possess distinct functions influencing cellular processes and disease.

Keywords:
genep53proteoforms

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Area of Science:

  • Molecular Biology
  • Genetics
  • Cancer Research

Background:

  • Protein p53 is a critical tumor suppressor, extensively studied for its role in carcinogenesis.
  • It functions as a transcription factor regulating vital cellular processes including DNA repair and apoptosis.
  • The complexity of p53's function is amplified by its representation through numerous proteoforms.

Purpose of the Study:

  • To describe the known proteoforms of protein p53.
  • To explore the diverse functionalities associated with these p53 proteoforms.
  • To elucidate the impact of proteoform diversity on cellular mechanisms and disease.

Main Methods:

  • Review of existing literature on TP53 gene expression and protein p53.
  • Analysis of alternative splicing, promoter usage, and translation initiation sites.
  • Examination of post-translational modifications and TP53 gene mutations.
  • Characterization of proteoform generation and functional implications.

Main Results:

  • The TP53 gene produces at least 12 isoforms.
  • Over 200 post-translational modifications contribute to proteoform diversity.
  • Point mutations in the TP53 gene further increase the variety of p53 proteoforms.
  • These proteoforms exhibit distinct functional roles, including the regulation of p53 transcriptional activity.

Conclusions:

  • Protein p53's multifunctionality is driven by a wide array of proteoforms.
  • Understanding these proteoforms is essential for comprehending p53's role in cellular regulation and disease.
  • Further research into p53 proteoforms promises insights into novel therapeutic strategies.