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• W3014920954 abstract "Abstract Gap junction (GJ) channels permit molecules, such as ions, metabolites and second messengers, to transfer between cells. Their function is critical for numerous cellular interactions. GJ channels are composed of Connexin (Cx) hexamers paired across extracellular space and typically form large rafts of clustered channels, called plaques, at cell appositions. Cxs together with molecules that interact with GJ channels make up a supramolecular structure known as the GJ Nexus. While the stability of connexin localization in GJ plaques has been studied, mobility of other Nexus components has yet to be addressed. Colocalization analysis of several nexus components and other membrane proteins reveal that certain molecules are excluded from the GJ plaque (Aquaporin 4, EAAT2b), while others are quite penetrant (lipophilic molecules, Cx30, ZO-1, Occludin). Fluorescence recovery after photobleaching (FRAP) of tagged Nexus-associated proteins showed that mobility in plaque domains is affected by mobility of the Cx proteins. These novel findings indicate that the GJ Nexus is a dynamic membrane organelle, with cytoplasmic and membrane-embedded proteins binding and diffusing according to distinct parameters. Summary Statement Gap junctions are clustered membrane channels in plasma membrane of astrocytes and other cells. We report new information on how gap junctions control location and mobility of other astrocyte proteins." @default.
• W3014920954 created "2020-04-10" @default.
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• W3014920954 date "2020-04-07" @default.
• W3014920954 modified "2023-09-26" @default.
• W3014920954 title "The dynamic Nexus: Gap junctions control protein localization and mobility in distinct and surprising ways" @default.
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• W3014920954 doi "https://doi.org/10.1101/2020.04.06.027540" @default.
• W3014920954 hasPublicationYear "2020" @default.
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