The Adherens Junction: A Mosaic of Cadherin and Nectin Clusters Bundled by Actin Filaments
Cadherin and nectin are distinct transmembrane proteins of adherens junctions. Their ectodomains mediate adhesion while their cytosolic regions couple the adhesive contact to the cytoskeleton. Both these proteins are essential for adherens junction formation and maintenance. However, some basic aspe...
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2013
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| Online Access: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3778168/ |
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pubmed-37781682014-05-01 The Adherens Junction: A Mosaic of Cadherin and Nectin Clusters Bundled by Actin Filaments Indra, Indrajyoti Hong, Soonjin Troyanovsky, Regina Kormos, Bernadett Troyanovsky, Sergey Article Cadherin and nectin are distinct transmembrane proteins of adherens junctions. Their ectodomains mediate adhesion while their cytosolic regions couple the adhesive contact to the cytoskeleton. Both these proteins are essential for adherens junction formation and maintenance. However, some basic aspects of these proteins, such as their organization in adherence junctions, have remained open. Therefore, using super-resolution microscopy and live-imaging, we focused on the subjunctional distribution of these proteins. We showed that cadherin and nectin in the junctions of A431 cells and human keratinocytes are located in separate clusters. The size of each cluster is independent of that of the adjacent clusters and can significantly fluctuate over time. Several nectin and cadherin clusters that constitute an individual adherens junction are united by the same actin filament bundle. Surprisingly, interactions between each cluster and F-actin are not uniform since neither vinculin nor LIM domain actin-binding proteins match the boundaries of cadherin or nectin clusters. Thus, the adherens junction is not a uniform structure but a mosaic of different adhesive units with very diverse modes of interaction with the cytoskeleton. We propose that such a mosaic architecture of adherence junctions is important for the fast regulation of their dynamics. 2013-05-02 2013-11 /pmc/articles/PMC3778168/ /pubmed/23639974 http://dx.doi.org/10.1038/jid.2013.200 Text en http://www.nature.com/authors/editorial_policies/license.html#terms Users may view, print, copy, and download text and data-mine the content in such documents, for the purposes of academic research, subject always to the full Conditions of use:http://www.nature.com/authors/editorial_policies/license.html#terms |
| repository_type |
Open Access Journal |
| institution_category |
Foreign Institution |
| institution |
US National Center for Biotechnology Information |
| building |
NCBI PubMed |
| collection |
Online Access |
| language |
English |
| format |
Online |
| author |
Indra, Indrajyoti Hong, Soonjin Troyanovsky, Regina Kormos, Bernadett Troyanovsky, Sergey |
| spellingShingle |
Indra, Indrajyoti Hong, Soonjin Troyanovsky, Regina Kormos, Bernadett Troyanovsky, Sergey The Adherens Junction: A Mosaic of Cadherin and Nectin Clusters Bundled by Actin Filaments |
| author_facet |
Indra, Indrajyoti Hong, Soonjin Troyanovsky, Regina Kormos, Bernadett Troyanovsky, Sergey |
| author_sort |
Indra, Indrajyoti |
| title |
The Adherens Junction: A Mosaic of Cadherin and Nectin Clusters Bundled by Actin Filaments |
| title_short |
The Adherens Junction: A Mosaic of Cadherin and Nectin Clusters Bundled by Actin Filaments |
| title_full |
The Adherens Junction: A Mosaic of Cadherin and Nectin Clusters Bundled by Actin Filaments |
| title_fullStr |
The Adherens Junction: A Mosaic of Cadherin and Nectin Clusters Bundled by Actin Filaments |
| title_full_unstemmed |
The Adherens Junction: A Mosaic of Cadherin and Nectin Clusters Bundled by Actin Filaments |
| title_sort |
adherens junction: a mosaic of cadherin and nectin clusters bundled by actin filaments |
| description |
Cadherin and nectin are distinct transmembrane proteins of adherens junctions. Their ectodomains mediate adhesion while their cytosolic regions couple the adhesive contact to the cytoskeleton. Both these proteins are essential for adherens junction formation and maintenance. However, some basic aspects of these proteins, such as their organization in adherence junctions, have remained open. Therefore, using super-resolution microscopy and live-imaging, we focused on the subjunctional distribution of these proteins. We showed that cadherin and nectin in the junctions of A431 cells and human keratinocytes are located in separate clusters. The size of each cluster is independent of that of the adjacent clusters and can significantly fluctuate over time. Several nectin and cadherin clusters that constitute an individual adherens junction are united by the same actin filament bundle. Surprisingly, interactions between each cluster and F-actin are not uniform since neither vinculin nor LIM domain actin-binding proteins match the boundaries of cadherin or nectin clusters. Thus, the adherens junction is not a uniform structure but a mosaic of different adhesive units with very diverse modes of interaction with the cytoskeleton. We propose that such a mosaic architecture of adherence junctions is important for the fast regulation of their dynamics. |
| publishDate |
2013 |
| url |
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3778168/ |
| _version_ |
1612012967289683968 |