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One-step Purification of Twin-Strep-tagged Proteins and Their Complexes on Strep-Tactin Resin Cross-linked With Bis(sulfosuccinimidyl) Suberate (BS3)
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Talin binding to integrin beta tails: a final common step in integrin activation

Seiji Tadokoro1, Sanford J Shattil, Koji Eto

  • 1Department of Cell Biology, The Scripps Research Institute, The Burnham Institute, La Jolla, CA 92037, USA.

Science (New York, N.Y.)
|October 4, 2003
PubMed

Insights

Talin binding to integrin tails controls cell adhesion and extracellular matrix assembly. This cytoskeletal protein binding is a key step in integrin activation, crucial for cell migration.

Area of Science:

  • Cell biology
  • Biochemistry
  • Molecular biology

Background:

  • Integrin activation regulates cell adhesion, migration, and extracellular matrix assembly.
  • Integrin activation is typically mediated by the integrin beta subunit cytoplasmic tail.
  • Various biochemical signaling pathways regulate integrin activation.

Purpose of the Study:

  • To investigate the role of talin binding in integrin activation.
  • To elucidate the mechanism by which talin influences integrin affinity.

Main Methods:

  • The study focused on the interaction between talin and integrin beta subunit cytoplasmic tails.
  • Investigated conformational changes in integrin extracellular domains upon talin binding.

Main Results:

  • Specific binding of talin to integrin beta subunit cytoplasmic tails induces conformational rearrangements.
  • These rearrangements in integrin extracellular domains lead to increased ligand affinity.
  • Regulated talin binding acts as a final common pathway in integrin activation signaling.

Conclusions:

  • Talin binding to integrin beta tails is a critical regulator of integrin activation.
  • This interaction is a convergence point for cellular signaling pathways controlling integrin function.
  • Understanding this mechanism is key to comprehending cell adhesion and migration processes.

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