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The DEAD box protein Ddx42p modulates the function of ASPP2, a stimulator of apoptosis

H Uhlmann-Schiffler1, S Kiermayer, H Stahl

  • 1Department of Medical Biochemistry and Molecular Biology, The Saarland University, Homburg, Germany. heike.uhlmann.schiffler@uniklinikum-saarland.de

Oncogene
|April 21, 2009
PubMed

Insights

The DEAD box protein Ddx42p interacts with apoptosis inducer ASPP2 in human cells. Ddx42p modulates ASPP2 function, impacting apoptosis and cell survival.

Area of Science:

  • Cell Biology
  • Molecular Biology
  • Biochemistry

Background:

  • DEAD box proteins are essential cellular components.
  • ASPP2 is a key regulator of apoptosis and p53 activity.
  • The function of Ddx42p in human cells remains largely unknown.

Purpose of the Study:

  • To investigate the cellular function of Ddx42p.
  • To determine the interaction between Ddx42p and ASPP2.
  • To elucidate the role of Ddx42p in apoptosis regulation.

Main Methods:

  • Co-immunoprecipitation to confirm protein-protein interactions.
  • Western blotting to analyze protein levels.
  • Cell viability assays to assess apoptosis.
  • Overexpression and knockdown studies of Ddx42p.

Main Results:

  • Ddx42p physically interacts with ASPP2 in human cells.
  • The interaction occurs between specific domains of both proteins.
  • Ddx42p overexpression inhibits ASPP2-induced apoptosis.
  • Ddx42p knockdown reduces cell survival.
  • Ddx42p influences the subcellular localization of ASPP2.

Conclusions:

  • Ddx42p is a novel modulator of ASPP2 function.
  • Ddx42p plays a significant role in regulating apoptosis and cell survival.
  • Understanding Ddx42p-ASPP2 interaction provides insights into apoptosis pathways.

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