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Updated: Dec 30, 2025

Mapping the Structure-Function Relationships of Disordered Oncogenic Transcription Factors Using Transcriptomic Analysis
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Mapping the Structure-Function Relationships of Disordered Oncogenic Transcription Factors Using Transcriptomic Analysis

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Cutting Edge: The RNA-Binding Protein Ewing Sarcoma Is a Novel Modulator of Lymphotoxin β Receptor Signaling

Richard Virgen-Slane1, Ricardo G Correa1, Parham Ramezani-Rad2

  • 1Laboratory of Molecular Immunology, Infectious and Inflammatory Diseases Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037.

Journal of Immunology (Baltimore, Md. : 1950)
|January 24, 2020
PubMed

Insights

Ewing sarcoma (EWS) protein regulates lymphotoxin β receptor (LTβR) signaling by interacting with TRAF3. This interaction limits pro-inflammatory molecule expression, promoting immune homeostasis.

Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Signaling

Background:

  • Lymphotoxin β receptor (LTβR) signaling is essential for developing lymphoid tissues and maintaining immune balance.
  • Understanding LTβR signaling regulation is key to controlling immune responses.

Purpose of the Study:

  • To discover novel regulators of LTβR signaling.
  • To elucidate the role of Ewing sarcoma (EWS) protein in LTβR pathway.

Main Methods:

  • Coexpression analysis of human fibroblasts stimulated via LTβR.
  • Affinity-purification mass spectrometry targeting TNFR-associated factor 3 (TRAF3).

Main Results:

  • Ewing sarcoma (EWS) protein identified as a novel LTβR signaling component.
  • EWS specifically associates with TRAF3, not TRAF2.
  • The EWS:TRAF3 complex forms before LTβR activation and dissociates upon stimulation.

Conclusions:

  • EWS acts as a negative regulator in the LTβR pathway.
  • EWS limits the expression of pro-inflammatory molecules like GM-CSF and ERK-2.
  • EWS contributes to maintaining immune homeostasis through LTβR signaling modulation.

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