Presenilin-1 forms complexes with the cadherin/catenin cell-cell adhesion system and is recruited to intercellular and synaptic contacts.
In MDCK cells, presenilin-1 (PS1) accumulates at intercellular contacts where it colocalizes with components of the cadherin-based adherens junctions. PS1 fragments form complexes with E-cadherin, beta-catenin, and alpha-catenin, all components of adherens junctions. In confluent MDCK cells, PS1 forms complexes with cell surface E-cadherin; disruption of Ca(2+)-dependent cell-cell contacts reduces ... surface PS1 and the levels of PS1-E-cadherin complexes. PS1 overexpression in human kidney cells enhances cell-cell adhesion. Together, these data show that PS1 incorporates into the cadherin/catenin adhesion system and regulates cell-cell adhesion. PS1 concentrates at intercellular contacts in epithelial tissue; in brain, it forms complexes with both E- and N-cadherin and concentrates at synaptic adhesions. That PS1 is a constituent of the cadherin/catenin complex makes that complex a potential target for PS1 FAD mutations.
Mesh Terms:
Animals, Cadherins, Cell Adhesion, Cell Line, Cytoskeletal Proteins, Dogs, Humans, Intercellular Junctions, Membrane Proteins, Presenilin-1, Rabbits, Synapses
Animals, Cadherins, Cell Adhesion, Cell Line, Cytoskeletal Proteins, Dogs, Humans, Intercellular Junctions, Membrane Proteins, Presenilin-1, Rabbits, Synapses
Mol. Cell
Date: Dec. 01, 1999
PubMed ID: 10635315
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