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Cadherin-catenin complex: protein interactions and their implications for cadherin function
H Aberle1, H Schwartz, R Kemler
1Max-Planck-Institut für Immunbiologie, Freiburg, Germany.
Journal of Cellular Biochemistry
|June 15, 1996
Summary
Cadherins, like E-cadherin, mediate cell adhesion through protein interactions. These interactions, involving catenins and actin filaments, are crucial for tissue development and signaling pathways.
Area of Science:
- Cell Biology
- Molecular Biology
- Developmental Biology
Background:
- Cadherins are calcium-dependent glycoproteins essential for cell-cell adhesion in multicellular organisms.
- E-cadherin is a key molecule in epithelial cell junctions, interacting homophilically with adjacent cells.
- Understanding cadherin structure and interactions is vital for cell adhesion mechanisms.
Purpose of the Study:
- To review protein interactions regulating the molecular architecture and function of cadherin-catenin complexes (CCC).
- To discuss the role of CCC in mammalian development and tissue morphogenesis.
- To examine phenotypes of embryos lacking E-cadherin or beta-catenin.
Main Methods:
- Structural analysis of extracellular cadherin domains.
- Investigating intracellular anchorage via catenin interactions.
- Examining cadherin-catenin complexes (CCC) and their link to actin filaments.
Main Results:
- The crystal structure reveals cadherins form linear cell adhesion zippers.
- Two distinct CCC, involving beta-catenin or plakoglobin with alpha-catenin, anchor cadherins.
- Catenins are involved in signal transduction and form a cadherin-independent complex with APC.
Conclusions:
- Protein interactions within CCC regulate molecular architecture and function.
- CCC play a fundamental role in mammalian development and tissue morphogenesis.
- Deficiencies in E-cadherin or beta-catenin lead to developmental phenotypes.