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Updated: Feb 16, 2026

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Structural principles of tumor necrosis factor superfamily signaling

Éva S Vanamee1, Denise L Faustman2

  • 1Immunobiology Department, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02129, USA.

Science Signaling
|January 4, 2018
PubMed

Insights

Tumor necrosis factor (TNF) signaling involves trimeric ligands and receptors forming hexagonal structures. Understanding this geometry is key to developing targeted therapies for cancer and autoimmune diseases.

Area of Science:

  • Immunology
  • Molecular Biology
  • Structural Biology

Background:

  • Tumor necrosis factor (TNF) superfamily ligands and receptors are crucial regulators of cell proliferation, survival, and death.
  • Dysregulation of TNF superfamily signaling is implicated in diseases such as cancer, autoimmunity, and infectious diseases.
  • Targeting TNF superfamily pathways offers therapeutic potential for various conditions.

Purpose of the Study:

  • To review the current understanding of the structure and geometry of TNF superfamily ligands, receptors, and their interactions.
  • To elucidate the molecular mechanisms underlying TNF receptor activation and signaling.
  • To provide insights for the design of novel TNF signaling-targeted therapies.

Main Methods:

  • Review of existing literature on TNF superfamily structure and function.
  • Analysis of structural data and geometric arrangements of ligands and receptors.
  • Examination of experimental evidence from antibody-mediated receptor modulation.

Main Results:

  • The basic signaling unit comprises a trimeric ligand interacting with three receptors at the ligand monomer interface.
  • Efficient signaling necessitates the clustering of multiple receptor subunits.
  • Receptors exist in a resting, hexagonal, antiparallel dimer arrangement, transitioning to an active state upon ligand binding and cross-linking.

Conclusions:

  • A model of TNF receptor activation involving ligand-induced clustering and stabilization of the active signaling state is proposed.
  • Understanding the structural basis of TNF signaling can guide the development of more effective therapeutic agents.
  • Targeted modulation of TNF receptor arrangement holds promise for treating TNF-related diseases.

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