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• W2073847253 abstract "Barrier junctions prevent pathogen invasion and restrict paracellular leakage across epithelial sheets. To understand how one barrier junction, the septate junction (SJ), is regulated in vivo, we used fluorescence recovery after photobleaching (FRAP) to examine SJ protein dynamics in Drosophila. Most SJ-associated proteins, including Coracle, Neurexin IV and Nervana 2, displayed similar, extremely immobile kinetics. Loss of any of these components resulted in dramatically increased mobility of all others, suggesting that they form a single, highly interdependent core complex. Immobilization of SJ core components coincided with formation of the morphological SJ but occurred after their known role in maintaining epithelial polarity, suggesting that these functions are independent. In striking contrast to the core components, the tumor suppressor protein Discs large was much more mobile and its loss did not affect mobility of core SJ proteins, suggesting that it is not a member of this complex, even though it colocalizes with the SJ. Similarly, disruption of endocytosis affected localization of SJ core components, but did not affect their mobility. These results indicate that formation of a stable SJ core complex is separable from its proper subcellular localization, and provide new insights into the complex processes that regulate epithelial polarity and assembly of the SJ." @default.
• W2073847253 created "2016-06-24" @default.
• W2073847253 creator A5009889196 @default.
• W2073847253 creator A5083624628 @default.
• W2073847253 date "2011-08-15" @default.
• W2073847253 modified "2023-10-09" @default.
• W2073847253 title "Analysis of protein dynamics within the septate junction reveals a highly stable core protein complex that does not include the basolateral polarity protein Discs large" @default.
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• W2073847253 doi "https://doi.org/10.1242/jcs.087700" @default.
• W2073847253 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3148133" @default.
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• W2073847253 hasPublicationYear "2011" @default.
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