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- W4322490003 abstract "The composition of the plasma membrane (PM) must be tightly controlled despite constant, rapid endocytosis, which requires active, selective recycling of endocytosed membrane components. For many proteins, the mechanisms, pathways, and determinants of this PM recycling remain unknown. We report that association with ordered, lipid-driven membrane microdomains (known as rafts) is sufficient for PM localization of a subset of transmembrane proteins and that abrogation of raft association disrupts their trafficking and leads to degradation in lysosomes. Using orthogonal, genetically encoded probes with tunable raft partitioning, we screened for the trafficking machinery required for efficient recycling of engineered microdomain-associated cargo from endosomes to the PM. Using this screen, we identified the Rab3 family as an important mediator of PM localization of microdomain-associated proteins. Disruption of Rab3 reduced PM localization of raft probes and led to their accumulation in Rab7-positive endosomes, suggesting inefficient recycling. Abrogation of Rab3 function also mislocalized the endogenous raft-associated protein Linker for Activation of T cells (LAT), leading to its intracellular accumulation and reduced T cell activation. These findings reveal a key role for lipid-driven microdomains in endocytic traffic and suggest Rab3 as a mediator of microdomain recycling and PM composition." @default.
- W4322490003 created "2023-02-28" @default.
- W4322490003 creator A5003522233 @default.
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- W4322490003 date "2023-02-27" @default.
- W4322490003 modified "2023-10-10" @default.
- W4322490003 title "Rab3 mediates a pathway for endocytic sorting and plasma membrane recycling of ordered microdomains" @default.
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- W4322490003 doi "https://doi.org/10.1073/pnas.2207461120" @default.
- W4322490003 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36848577" @default.
- W4322490003 hasPublicationYear "2023" @default.