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Updated: Oct 16, 2026

Bead Aggregation Assays for the Characterization of Putative Cell Adhesion Molecules
08:15

Bead Aggregation Assays for the Characterization of Putative Cell Adhesion Molecules

Published on: October 17, 2014

Platelet-endothelial cell adhesion molecule-1 (CD31), a scaffolding molecule for selected catenin family members

N Ilan1, L Cheung, E Pinter

  • 1Department of Pathology, Yale University School of Medicine, New Haven, Connecticut 06520, USA.

The Journal of Biological Chemistry
|May 10, 2000
PubMed

Insights

Platelet-endothelial cell adhesion molecule (PECAM)-1 interacts with beta-catenin and gamma-catenin, influencing their localization and phosphorylation. This reveals PECAM-1

Area of Science:

  • Molecular and Cell Biology
  • Immunology
  • Biochemistry

Background:

  • Platelet-endothelial cell adhesion molecule (PECAM)-1 is recognized as an endothelium-specific marker.
  • Emerging evidence indicates PECAM-1's role extends beyond cell marking, involving signal transduction pathways.
  • PECAM-1's function is modulated by phosphorylation and the recruitment of signaling molecules.

Purpose of the Study:

  • To investigate the association of PECAM-1 with catenins beyond beta-catenin.
  • To elucidate the role of protein kinase C (PKC) in PECAM-1 phosphorylation and catenin interaction.
  • To understand the molecular mechanisms underlying PECAM-1's interaction with the cytoskeleton.

Main Methods:

  • In vitro and in vivo association studies of PECAM-1 with beta-catenin and gamma-catenin.
  • In vitro phosphorylation assays using purified PECAM-1 and PKC enzyme.
  • Analysis of catenin association with PECAM-1 phosphorylation.
  • Cellular localization studies in transfected SW480 cells.
  • Investigation of PECAM-1 recruitment into cytoskeletal fractions.

Main Results:

  • PECAM-1 associates with both beta-catenin and gamma-catenin.
  • PKC directly phosphorylates PECAM-1, and this serine/threonine phosphorylation inversely correlates with gamma-catenin association.
  • PECAM-1 facilitates gamma-catenin recruitment to cell-cell junctions, and gamma-catenin may anchor PECAM-1 to the cytoskeleton.

Conclusions:

  • PECAM-1 acts as a crucial binder and modulator of catenins.
  • The findings provide a molecular basis for PECAM-1's involvement in cytoskeleton interactions.
  • This study expands the understanding of PECAM-1's multifaceted roles in cellular signaling and adhesion.

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