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A structural template for gp130-cytokine signaling assemblies.

Dar-chone Chow1, Lena Brevnova, Xiao-lin He

  • 1Deparment of Microbiology and Immunology, Stanford University School of Medicine, Stanford, CA 94305-5124, USA.

Biochimica Et Biophysica Acta
|November 8, 2002
PubMed
Summary

The gp130-cytokine system

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Area of Science:

  • Structural biology
  • Immunology
  • Molecular biology

Background:

  • The gp130-cytokine system is crucial for cellular signaling.
  • Understanding ligand recognition and receptor activation is key.
  • Classical dimeric systems differ from gp130-cytokine recognition.

Purpose of the Study:

  • To elucidate the mechanism of active signaling complex assembly.
  • To determine the structure of gp130-cytokine complexes.
  • To reconcile functional and mutagenesis data with structural findings.

Main Methods:

  • Analysis of crystal structure of viral interleukin-6 (vIL-6) complexed with gp130 extracellular domains.
  • Review of existing functional and mutagenesis data.

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Main Results:

  • A crystal structure of vIL-6/gp130 complex resolved longstanding questions.
  • The vIL-6/gp130 structure reconciles functional and mutagenesis data.
  • The complex geometry provides a structural template for other gp130-cytokines.

Conclusions:

  • The vIL-6/gp130 complex structure offers insights into gp130-cytokine recognition.
  • This structural template may apply to other cytokine signaling systems.
  • Structural studies are vital for understanding complex biological systems.