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Related Experiment Videos

Structure, function and evolutionary relationship of proteins containing a disintegrin domain.

C P Blobel1, J M White

  • 1Department of Pharmacology, University of California, San Francisco 94143-0450.

Current Opinion in Cell Biology
|October 1, 1992
PubMed
Summary

Disintegrins, snake venom proteins, disrupt cell interactions. Their structures reveal how they bind integrins, and new research shows related proteins mediate cell-cell adhesion.

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Area of Science:

  • Biochemistry
  • Molecular Biology
  • Cell Biology

Background:

  • Disintegrins are bioactive peptides found in snake venom.
  • They function as soluble ligands that inhibit integrin-mediated cell adhesion.
  • Integrins are crucial cell surface receptors involved in cell-matrix and cell-cell interactions.

Purpose of the Study:

  • To provide molecular insights into the interaction between disintegrins and integrins.
  • To explore the structural basis of disintegrin function.
  • To investigate the broader family of disintegrin domain-containing proteins.

Main Methods:

  • Nuclear Magnetic Resonance (NMR) spectroscopy was used to determine the structures of two disintegrins.
  • Bioinformatic analysis and protein domain identification were employed.

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Main Results:

  • The NMR structures revealed novel molecular details of disintegrin-integrin engagement.
  • Disintegrins are derived from larger precursor proteins.
  • A family of membrane-anchored proteins contains disintegrin-like domains.

Conclusions:

  • Structural data elucidates the mechanism of disintegrin action on integrins.
  • Disintegrin domains are versatile modules involved in both cell-matrix and cell-cell interactions.
  • The discovery of membrane-anchored disintegrin proteins expands their known biological roles.