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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

c-Abl tyrosine kinase activates p21 transcription via interaction with p53

Yuqi Jing1, Min Wang, Wen Tang

  • 1Institute of Genetics and Cytology, Northeast Normal University, Changchun 130024, China.

Journal of Biochemistry
|March 7, 2007
PubMed

Insights

The Abl tyrosine kinase (c-Abl) activates p21 gene transcription by interacting with p53. This interaction enhances p53

Area of Science:

  • Molecular Biology
  • Biochemistry
  • Cell Biology

Background:

  • The non-receptor tyrosine kinase c-Abl plays roles in various cellular processes.
  • Its precise mechanism in regulating gene transcription, particularly the p21 promoter, is not fully understood.

Purpose of the Study:

  • To investigate the role of c-Abl in the activation of the p21 promoter.
  • To elucidate the molecular mechanisms underlying c-Abl's transcriptional regulation.

Main Methods:

  • Overexpression of c-Abl in U2OS cells.
  • Analysis of p21 promoter activity and endogenous p21 transcription.
  • Investigation of p53 involvement using structural and interaction studies.
  • Chromatin immunoprecipitation (ChIP) assays to assess protein recruitment to the p21 promoter.

Main Results:

  • Overexpression of c-Abl activated the p21 promoter and p21 transcription.
  • p53 is essential for c-Abl-mediated p21 promoter activation, requiring its integrative structure.
  • c-Abl and p53 are recruited to the p53 binding site on the p21 promoter.
  • c-Abl enhances the DNA binding activity of p53 to the p21 promoter.
  • The interaction between c-Abl and p53 is crucial for both promoter activation and recruitment.

Conclusions:

  • c-Abl directly regulates p21 transcription through interaction with p53.
  • This interaction enhances p53 binding to the p21 promoter, leading to transcriptional activation.
  • c-Abl's role in gene transcription involves modulating transcription factor activity via protein-protein interactions.

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