T Cell Receptor Engagement Triggers a Compact Conformation in CD3 Subunits
Author Information
Author(s): Risueño Ruth M., Schamel Wolfgang W. A., Alarcón Balbino
Primary Institution: Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas, Universidad Autónoma de Madrid, Madrid, Spain
Hypothesis
How does T cell receptor (TCR) engagement affect the conformation of its CD3 subunits?
Conclusion
The study shows that TCR engagement induces a conformational change in the CD3 subunits, making them more compact and resistant to proteolysis.
Supporting Evidence
- TCR engagement leads to a conformational change that protects CD3ε and CD3ζ tails from proteolysis.
- Binding of specific antibodies induces a compact structure in the CD3 subunits.
- Previous studies indicated that conformational changes in TCR are essential for signaling.
- Protease sensitivity assays demonstrated the compact conformation of CD3 tails upon TCR triggering.
Takeaway
When T cells are activated, their receptors change shape to protect important parts from being broken down, helping them send signals better.
Methodology
The study used protease-sensitivity assays to assess conformational changes in CD3 subunits upon TCR triggering.
Limitations
The study did not investigate the effects on CD3γ and CD3δ due to lack of appropriate antibodies.
Digital Object Identifier (DOI)
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