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Cited by 181

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The Carboxyl Terminus of Zona Occludens-3 Binds and Recruits a Mammalian Homologue of Discs Lost to Tight Junctions

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Roh, Michael H., Liu, Chia-Jen, Laurinec, Stephanie, Margolis, Ben·2002·Journal of Biological Chemistry

Abstract

Mammalian homologues of the Drosophila polarity proteins Stardust, Discs Lost, and Crumbs have been identified as Pals1, Pals1-associated tight junction protein (PATJ), and human Crumbs homologue 1 (CRB1), respectively. We have previously demonstrated that PATJ, Pals1, and CRB1 can form a tripartite tight junction complex in epithelial cells and that PATJ recruits Pals1 to tight junctions. Here, we observed that the Pals1/PATJ interaction was not crucial for the ultimate targeting of PATJ itself to tight junctions. This prompted us to examine if any of the 10 post-synaptic density-95/Discs Large/zona occludens-1 (PDZ) domains of PATJ could bind to the carboxyl termini of known tight junction constituents. We found that the 6th and 8th PDZ domains of PATJ can interact with the carboxyl termini of zona occludens-3 (ZO-3) and claudin 1, respectively. PATJ missing the 6th PDZ domain was found to mislocalize away from cell contacts. Surprisingly, deleting the 8th PDZ domain had little effect on PATJ localization. Finally, reciprocal co-immunoprecipitation experiments revealed that full-length ZO-3 can associate with PATJ. Hence, the PATJ/ZO-3 interaction is likely important for recruiting PATJ and its associated proteins to tight junctions.

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Metadata

Authors
Roh, M. H., Liu, C.-J., Laurinec, S., & Margolis, B.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2002-07
Volume
277
Issue
30
Pages
27501-27509
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2091470454
Cited by
181
References
6
FWCI
7.11
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: The Carboxyl Terminus of Zona Occludens-3 Binds and Recruits a Mammalian Homologue of Discs Lost to Tight Junctions. https://app.cochat.ai/papers/10.1074/jbc.m201177200
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Roh, M. H., Liu, C.-J., Laurinec, S., & Margolis, B. (2002). The Carboxyl Terminus of Zona Occludens-3 Binds and Recruits a Mammalian Homologue of Discs Lost to Tight Junctions. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m201177200

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