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- W2037403702 abstract "Clathrin-mediated endocytosis regulates the internalization of many nutrient and signaling receptors. Clathrin and endocytic accessory proteins are recruited to receptors by specific adaptors. The adaptor Disabled-2 (Dab2) recruits its cargoes, including the low-density lipoprotein receptor (LDLR), and mediates endocytosis, even when the major adaptor protein AP2 is depleted. We hypothesized that the accessory proteins normally recruited by AP2 may be recruited by Dab2 if AP2 is absent. We identified one such accessory protein, the F-BAR protein FCH domain only-2 (FCHO2), as a major Dab2-interacting protein. The μ-homology domain (μHD) of FCHO2 binds directly to DPF sequences in Dab2 that also bind AP2. Disrupting the Dab2-FCHO2 interaction inhibited Dab2-mediated LDLR endocytosis in AP2-depleted cells. Depleting FCHO2 reduced the number but increased the size of clathrin structures on the adherent surface of HeLa cells and inhibited LDLR and transferrin receptor clustering. However, LDLR was internalized efficiently by FCHO2-deficient cells when additional time was provided for LDLR to enter the enlarged structures before budding, suggesting that later steps of endocytosis are normal under these conditions. These results indicate FCHO2 regulates the size of clathrin structures, and its interaction with Dab2 is needed for LDLR endocytosis under conditions of low AP2." @default.
- W2037403702 created "2016-06-24" @default.
- W2037403702 creator A5006926539 @default.
- W2037403702 creator A5072832150 @default.
- W2037403702 date "2012-04-01" @default.
- W2037403702 modified "2023-10-16" @default.
- W2037403702 title "FCH domain only-2 organizes clathrin-coated structures and interacts with Disabled-2 for low-density lipoprotein receptor endocytosis" @default.
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- W2037403702 doi "https://doi.org/10.1091/mbc.e11-09-0812" @default.
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