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TRAF3 can interact with GMEB1 and modulate its anti-apoptotic function.

George Kotsaris1,2, Despoina Kerselidou1,3, Dimitrios Koutsoubaris4

  • 1Department of Genetics, Development and Molecular Biology, School of Biology, Aristotle University of Thessaloniki, University Campus, 54124 Thessaloniki, Macedonia Greece.

Journal of Biological Research (Thessalonike, Greece)
|June 10, 2020
PubMed
Summary

Tumor Necrosis Factor Receptor-Associated Factor 3 (TRAF3) interacts with Glucocorticoid Modulatory Element-Binding Protein 1 (GMEB1), an apoptosis inhibitor. TRAF3 enhances GMEB1's anti-apoptotic function, suggesting a regulatory role in cell survival pathways.

Keywords:
ApoptosisGMEB1Protein–protein interactionSignal transductionTNFTRAF3

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Area of Science:

  • Molecular Biology
  • Immunology
  • Cell Biology

Background:

  • Tumor Necrosis Factor Receptor-Associated Factors (TRAFs) mediate TNF receptor signaling.
  • TRAF3 plays a key role in immune regulation and is implicated in malignancies.
  • Understanding TRAF3's molecular mechanisms is crucial for disease insights.

Purpose of the Study:

  • To identify proteins interacting with TRAF3 using a yeast two-hybrid system.
  • To characterize the functional relationship between TRAF3 and its interacting partners.
  • To elucidate TRAF3's role in regulating apoptosis.

Main Methods:

  • Yeast two-hybrid screening of a human B cell cDNA library.
  • Confirmation of protein interactions using co-immunoprecipitation in mammalian cells.
  • Assessment of apoptosis inhibition via cell viability assays and RNA interference.

Main Results:

  • Glucocorticoid Modulatory Element-Binding Protein 1 (GMEB1) was identified as a TRAF3-interacting protein.
  • TRAF3 was confirmed to interact with GMEB1 in mammalian cells.
  • TRAF3 overexpression enhanced GMEB1's anti-apoptotic activity, while TRAF3 downregulation reduced it.

Conclusions:

  • TRAF3 interacts with the apoptosis inhibitor GMEB1.
  • TRAF3 positively regulates GMEB1-mediated inhibition of apoptosis.
  • These findings contribute to understanding TRAF3's function in cell survival and potential therapeutic strategies.