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Yeast As a Chassis for Developing Functional Assays to Study Human P53
14:57

Yeast As a Chassis for Developing Functional Assays to Study Human P53

Published on: August 4, 2019

Wild-type p53 in cellular-transformation - a reassessment

T Kolzau1, W Deppert

  • 1HEINRICH PETTE INST EXPTL VIROL & IMMUNOL,MARTINISTR 52,W-2000 HAMBURG 20,GERMANY.

International Journal of Oncology
|May 17, 2011
PubMed

Insights

Previously identified mutant p53 cDNA is actually wild-type p53. This suggests wild-type p53 can induce cellular transformation, relevant to human tumors.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Genetics

Background:

  • The tumor suppressor protein p53 plays a critical role in preventing cancer.
  • Previous studies utilized p53 cDNA clones that were characterized as mutant.
  • The functional implications of wild-type p53 in cellular transformation were not fully understood.

Purpose of the Study:

  • To re-evaluate the characterization of a specific mouse p53 cDNA clone (pP53-5).
  • To investigate the potential for wild-type p53 to induce cellular transformation.
  • To clarify the role of sequencing artifacts in p53 mutation analysis.

Main Methods:

  • Sequencing of both DNA strands to resolve potential sequencing artifacts.
  • Analysis of p53 cDNA clones isolated from mouse cells.
  • Utilizing established cellular immortalization and transformation assays.

Main Results:

  • The mouse p53 cDNA clone pP53-5 was re-characterized as wild-type p53, with previously identified mutations attributed to sequencing artifacts.
  • Similar sequencing artifacts were identified in p53 cDNA from T3T3 cells, which were resolved by bidirectional sequencing.
  • The wild-type p53 clone (pP53-5) induced cellular immortalization and transformation in assays.

Conclusions:

  • Sequencing artifacts can lead to mischaracterization of p53 cDNA as mutant.
  • Wild-type p53, under specific conditions, possesses the capability to induce cellular transformation.
  • These findings have implications for understanding the role of wild-type p53 in human tumorigenesis, especially in cases of overexpression.

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