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Updated: Jun 8, 2026
08:15
Bead Aggregation Assays for the Characterization of Putative Cell Adhesion Molecules
Published on: October 17, 2014
Cooperativity between trans and cis interactions in cadherin-mediated junction formation
Yinghao Wu1, Xiangshu Jin, Oliver Harrison
1Department of Biochemistry and Molecular Biophysics, Howard Hughes Medical Institute, Columbia University, New York, NY 10032, USA.
Summary
Cadherin cis interactions, though weak, are crucial for forming ordered intercellular junctions. Monte Carlo simulations reveal this cooperative process involves both cis and trans cadherin binding.
Area of Science:
- Cell biology
- Biophysics
- Computational biology
Background:
- Intercellular junctions, such as desmosomes and adherens junctions, are formed by cadherins.
- Cadherins form 2D arrays of trans dimers between opposing cell surfaces.
- Lateral cis interactions between cadherins on the same cell surface are proposed to mediate cadherin clustering.
Purpose of the Study:
- To investigate the role of anisotropic cis interactions in cadherin clustering and junction formation.
- To understand the molecular mechanisms underlying cadherin-mediated cell adhesion.
- To explore the cooperative effects of cis and trans cadherin interactions.
Main Methods:
- Monte Carlo simulations on a 2D lattice.
- Modeling anisotropic binding affinities for cadherin cis interactions.
- Analysis of phase transitions between diffusing cadherin monomers/dimers and ordered 2D junctions.
Main Results:
- Cadherin junction formation is a cooperative process involving both cis and trans interactions.
- Anisotropic cis interactions are critical for establishing ordered 2D cadherin junction structures.
- Even weak cis interactions, undetectable in solution, significantly influence junction assembly.
Conclusions:
- The formation of ordered cadherin junctions is a complex, cooperative phenomenon.
- Anisotropic cis interactions play a vital role in stabilizing cadherin clusters and junctions.
- Computational modeling provides insights into the molecular basis of cell adhesion and junction assembly.
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