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Ligand binding and affinity modulation of integrins

E C Tozer1, P E Hughes, J C Loftus

  • 1Department of Vascular Biology, Scripps Research Institute, La Jolla, CA 92037, USA. ecollins@scripps.edu

Biochemistry and Cell Biology = Biochimie Et Biologie Cellulaire
|January 1, 1996
PubMed
Summary

Integrins are cell adhesion receptors crucial for cell interactions. This review explores how they bind ligands and how their affinity is regulated, impacting cell migration and platelet aggregation.

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Area of Science:

  • Biochemistry
  • Cell Biology
  • Molecular Biology

Background:

  • Integrins are vital cell adhesion receptors mediating cell-cell and cell-extracellular matrix interactions.
  • Their extracellular domains contain binding sites for various protein ligands, requiring divalent cations and specific ligand motifs.
  • Integrins exhibit dynamic affinity regulation, a process known as inside-out signaling, critical for cellular functions.

Purpose of the Study:

  • To review the molecular basis of ligand-integrin interactions.
  • To explore the mechanisms controlling integrin affinity states.

Main Methods:

  • Literature review of molecular and cellular mechanisms.
  • Analysis of structural and functional data on integrin-ligand binding.
  • Examination of signaling pathways regulating integrin affinity.

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Main Results:

  • Ligand binding is dependent on divalent cations and specific ligand motifs.
  • Integrins can modulate their ligand-binding affinity through inside-out signaling.
  • This dynamic regulation is essential for cell migration and platelet aggregation.

Conclusions:

  • Understanding integrin-ligand interactions and affinity regulation is key to deciphering cellular processes.
  • Further research into these mechanisms can inform therapeutic strategies for diseases involving cell adhesion.