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Updated: Jul 17, 2026
09:14
Static Adhesion Assay for the Study of Integrin Activation in T Lymphocytes
Published on: June 13, 2014
Structural basis of integrin regulation and signaling
Bing-Hao Luo1, Christopher V Carman, Timothy A Springer
1The CBR Institute for Biomedical Research, Department of Pathology, Harvard Medical School, Boston, Massachusetts 02115, USA. luo@cbr.med.harvard.edu
Annual Review of Immunology
|January 5, 2007
Summary
Integrins are key cell adhesion molecules. Recent studies reveal how their structure enables bidirectional signaling, impacting immune cell function and interactions.
Area of Science:
- Cell Biology
- Immunology
- Structural Biology
Background:
- Integrins are crucial cell adhesion molecules mediating diverse cellular interactions.
- They are vital for immune cell functions like trafficking, synapse formation, and phagocytosis.
- Integrin function is regulated by inside-out signaling and ligand binding (outside-in signaling).
Purpose of the Study:
- To review recent advances in understanding integrin structure and bidirectional signaling mechanisms.
- To focus on how integrin structure relates to affinity modulation, ligand binding, and signaling.
- To discuss the dynamics of integrin cell surface distribution.
Main Methods:
- Structural studies (e.g., X-ray crystallography, cryo-EM)
- Biochemical assays
- Biophysical techniques
Main Results:
- Integrin ectodomain reorientations up to 200 Å correlate with ligand-binding site conformational changes.
- These structural changes are linked to alterations in alpha and beta subunit transmembrane domain association.
- Bidirectional signaling mechanisms across the plasma membrane are increasingly understood.
Conclusions:
- Integrin structure is fundamental to regulating cell adhesion and signaling.
- Understanding these structural dynamics provides insights into immune cell behavior and disease.
- Further research on integrin structure-function relationships is essential.
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