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Related Experiment Videos

The linchpin? Pin1 meets p73.

Marshall Urist1, Carol Prives

  • 1Department of Biological Sciences, Columbia University, New York, NY 10027, USA.

Cancer Cell
|June 15, 2004
PubMed
Summary

The peptidyl-prolyl isomerase Pin1 alters p73 protein structure, enhancing its acetylation. This suggests Pin1 is a key mediator for the p53 protein family

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Area of Science:

  • Molecular Biology
  • Protein Biochemistry
  • Cancer Research

Background:

  • The p53 protein family plays a crucial role in apoptosis and tumor suppression.
  • Peptidyl-prolyl isomerase Pin1 is implicated in regulating protein function through conformational changes.
  • The interaction between Pin1, p73, and p300 in the context of apoptosis is not fully understood.

Purpose of the Study:

  • To investigate the role of Pin1 in the regulation of p73.
  • To elucidate the mechanism by which Pin1 affects p73 acetylation.
  • To determine if Pin1 acts as a common mediator for the p53 family's proapoptotic functions.

Main Methods:

  • Conformational analysis of p73.
  • Assays to detect and quantify p73 acetylation.
  • Experiments to assess the dependence of these interactions on c-Abl kinase activity.

Main Results:

  • Pin1 was shown to conformationally alter p73.
  • This alteration promotes the acetylation of p73 by p300.
  • The acetylation process was dependent on c-Abl kinase activity.

Conclusions:

  • Pin1 is a key regulator of p73 function.
  • Pin1-mediated p73 acetylation is a c-Abl dependent process.
  • Pin1 may serve as a common link for the proapoptotic activity of the p53 family members.

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