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- W2297444328 abstract "Numb is an endocytic protein that plays crucial roles in diverse cellular processes such as asymmetric cell division, cell migration and differentiation. However, the molecular mechanism by which Numb regulates endocytic trafficking is poorly understood. Here, we demonstrate that Numb is a docking regulator for homotypic fusion of early endosomes (EEs). Numb depletion causes clustered but unfused EEs, which can be rescued by overexpressing cytosolic Numb 65 and Numb 71 but not plasma membrane-attached Numb 66 or Numb 72. Time-lapse analysis reveals that paired vesicles tend to tether but not fuse with each other in the absence of Numb. We further show that Numb binds to another docking regulator, Mon1b, and is required for the recruitment of cytosolic Mon1b to the EE membrane. Consistent with this, deletion of Mon1b causes similar defects in EE fusion. Our study thus identifies a novel mechanism by which Numb regulates endocytic sorting by mediating EE fusion." @default.
- W2297444328 created "2016-06-24" @default.
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- W2297444328 date "2016-03-18" @default.
- W2297444328 modified "2023-10-18" @default.
- W2297444328 title "Numb regulates vesicular docking for homotypic fusion of early endosomes via membrane recruitment of Mon1b" @default.
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- W2297444328 doi "https://doi.org/10.1038/cr.2016.34" @default.
- W2297444328 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4856763" @default.
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