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Related Experiment Videos

Integrin structure, allostery, and bidirectional signaling.

M A Arnaout1, B Mahalingam, J-P Xiong

  • 1Structural Biology Program, Leukocyte Biology and Inflammation Program, Nephrology Division, Department of Medicine, Massachusetts General Hospital and Harvard Medical School, Charlestown, Massachussetts 02129, USA. arnaout@receptor.mgh.harvard.edu

Annual Review of Cell and Developmental Biology
|October 11, 2005
PubMed
Summary
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Integrin receptors control cell adhesion through dynamic structural changes. New structural data reveals how these allosteric shifts regulate cell signaling and biological functions.

Area of Science:

  • Cell biology
  • Biochemistry
  • Structural biology

Background:

  • Alphabeta heterodimeric integrins are crucial for cell-cell and cell-extracellular matrix (ECM) interactions.
  • These receptors dynamically modulate adhesive functions by altering ligand-binding affinity.
  • Intracellular protein interactions trigger conformational changes in integrins, affecting ectodomain structure.

Purpose of the Study:

  • To review recent structural data on integrin dynamics.
  • To elucidate the allosteric mechanisms governing integrin function.
  • To provide a structural context for understanding integrin-mediated signaling.

Main Methods:

  • Review of Nuclear Magnetic Resonance (NMR) data.
  • Analysis of crystallographic data.

Related Experiment Videos

  • Examination of Electron Microscopy (EM) data.

    • Main Results:

    • Recent structural studies offer insights into dynamic integrin structures.
    • Allosteric changes are key to integrin function and ligand binding.
    • The alphaVbeta3 integrin crystal structure provides a framework for biochemical interpretation.

    Conclusions:

    • Integrin structure and dynamics are central to their diverse biological roles.
    • Understanding integrin allostery is critical for interpreting cell adhesion and signaling.
    • New structural data advances our comprehension of integrin receptor mechanisms.