Single-molecule analysis of cadherin-mediated cell-cell adhesion

Porntula Panorchan, Melissa S. Thompson, Kelly J. Davis, Yiider Tseng, Konstantinos Konstantopoulos, Denis Wirtz

Research output: Contribution to journalArticle

Abstract

Cadherins are ubiquitous cell surface molecules that are expressed in virtually all solid tissues and localize at sites of cell-cell contact. Cadherins form a large and diverse family of adhesion molecules, which play a crucial role in a multitude of cellular processes, including cell-cell adhesion, motility, and cell sorting in maturing organs and tissues, presumably because of their different binding capacity and specificity. Here, we develop a method that probes the biochemical and biophysical properties of the binding interactions between cadherins expressed on the surface of living cells, at the single-molecule level. Single-molecule force spectroscopy reveals that classical cadherins, N-cadherin and E-cadherin, form bonds that display adhesion specificity, and a pronounced difference in adhesion force and reactive compliance, but not in bond lifetime. Moreover, their potentials of interaction, derived from force-spectroscopy measurements, are qualitatively different when comparing the single-barrier energy potential for the dissociation of an N-cadherin-N-cadherin bond with the double-barrier energy potential for an E-cadherin-E-cadherin bond. Together these results suggest that N-cadherin and E-cadherin molecules form homophilic bonds between juxtaposed cells that have significantly different kinetic and micromechanical properties.

Original languageEnglish (US)
Pages (from-to)66-74
Number of pages9
JournalJournal of cell science
Volume119
Issue number1
DOIs
StatePublished - Jan 1 2006

Keywords

  • Biophysics
  • Cadherins
  • Cell adhesion
  • Single-molecule force spectroscopy

ASJC Scopus subject areas

  • Cell Biology

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