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- W2040882581 abstract "The actin cytoskeleton has been implicated in restricting diffusion of plasma membrane components. Here, simultaneous observations of quantum dot-labelled FcɛRI motion and GFP-tagged actin dynamics provide direct evidence that actin filament bundles define micron-sized domains that confine mobile receptors. Dynamic reorganization of actin structures occurs over seconds, making the location and dimensions of actin-defined domains time-dependent. Multiple FcɛRI often maintain extended close proximity without detectable correlated motion, suggesting that they are co-confined within membrane domains. FcɛRI signalling is activated by crosslinking with multivalent antigen. We show that receptors become immobilized within seconds of crosslinking. Disruption of the actin cytoskeleton results in delayed immobilization kinetics and increased diffusion of crosslinked clusters. These results implicate actin in membrane partitioning that not only restricts diffusion of membrane proteins, but also dynamically influences their long-range mobility, sequestration and response to ligand binding." @default.
- W2040882581 created "2016-06-24" @default.
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- W2040882581 date "2008-07-20" @default.
- W2040882581 modified "2023-10-06" @default.
- W2040882581 title "Actin restricts FcɛRI diffusion and facilitates antigen-induced receptor immobilization" @default.
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- W2040882581 doi "https://doi.org/10.1038/ncb1755" @default.
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