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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
1HEINRICH PETTE INST EXPTL VIROL & IMMUNOL,MARTINISTR 52,W-2000 HAMBURG 20,GERMANY.
International Journal of Oncology
|May 17, 2011
Summary
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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