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Updated: May 7, 2025
05:48
Cell Aggregation Assays to Evaluate the Binding of the Drosophila Notch with Trans-Ligands and its Inhibition by Cis-Ligands
Published on: January 2, 2018
7.4K
Diversity in Notch ligand-receptor signaling interactions
Rachael Kuintzle1, Leah A Santat1,2, Michael B Elowitz1,2
1Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, United States.
Elife
|January 3, 2025
Summary
The Notch pathway
Area of Science:
- Cellular signaling pathways
- Molecular biology
- Developmental biology
Background:
- Notch signaling is crucial for cell-to-cell communication.
- Ligand-receptor interactions and Fringe glycosyltransferases modulate Notch signaling strength.
- Understanding these interactions is key to controlling cellular behavior.
Purpose of the Study:
- To quantitatively characterize Notch signaling efficiencies.
- To systematically analyze trans-activation, cis-inhibition, and cis-activation.
- To determine the impact of ligand and Fringe expression levels on signaling outcomes.
Main Methods:
- Employed a quantitative, bottom-up, cell-based approach.
- Analyzed interactions across Chinese hamster and mouse cell lines.
- Systematically varied ligand and Fringe expression levels.
Main Results:
- Each Notch ligand (Dll1, Dll4, Jag1, Jag2) and receptor (Notch1, Notch2) showed unique interaction profiles.
- Cis-interactions were mostly inhibitory, except for Dll1/Dll4-Notch2 pairs which showed cis-activation.
- Lfng modulated trans-activation differently for Delta and Jagged ligands.
Conclusions:
- Detailed map of Notch receptor-ligand-Fringe interactions provides insights into signaling dynamics.
- Findings can guide rational control and perturbation of the Notch pathway.
- Quantitative understanding of Notch signaling components is essential.
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