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Updated: Jul 17, 2026

Bead Aggregation Assays for the Characterization of Putative Cell Adhesion Molecules
Published on: October 17, 2014
The armadillo repeat region targets ARVCF to cadherin-based cellular junctions.
U Kaufmann1, C Zuppinger, Z Waibler
1Institut der Anthropologie und Humangenetik fuer Biologen, Johann-Wolfgang-Goethe-Universitaet Frankfurt, Siesmayerstrasse 70, D-60054 Frankfurt/Main, Germany.
ARVCF, a p120 subfamily member, binds to M-cadherin, linking the cytoskeleton to cell membranes. Its armadillo repeats are crucial for this interaction, essential for junctional localization.
Area of Science:
- Cell biology
- Molecular biology
- Protein-protein interactions
Background:
- M-cadherin's cytoplasmic domain anchors cytoskeletal elements at cell-cell junctions.
- Armadillo repeat proteins mediate the linkage between cadherins and the cytoskeleton.
Purpose of the Study:
- To identify and characterize ARVCF as a binding partner for M-cadherin.
- To define the specific regions of ARVCF and M-cadherin involved in their interaction.
Main Methods:
- Yeast two-hybrid screens using a skeletal muscle cDNA library.
- Mammalian cell-based MOM recruitment assay.
- Immunoprecipitation and in vitro binding assays.
- Mutational analysis of ARVCF and M-cadherin.
Main Results:
- ARVCF specifically binds to the cytoplasmic domain of M-cadherin.
- The armadillo repeat region of ARVCF is necessary and sufficient for M-cadherin binding.
- The N-terminal armadillo repeats of ARVCF are essential for its localization to junctional structures.
Conclusions:
- ARVCF is a novel ligand for M-cadherin, mediating cytoskeletal linkage.
- The interaction is primarily mediated by ARVCF's armadillo repeats and M-cadherin's membrane-proximal region.
- ARVCF's N-terminal armadillo repeats are critical for its recruitment to cell-cell junctions.
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