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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Tepass, Ulrich Harris, Kathryn P. |
| Description | Author Affiliation: Harris KP ( Department of Cell and Systems Biology, University of Toronto, Toronto, Ontario M5S 3G5, Canada.) |
| Abstract | Cell rearrangements require dynamic changes in cell–cell contacts to maintain tissue integrity. We investigated the function of Cdc42 in maintaining adherens junctions (AJs) and apical polarity in the Drosophila melanogaster neuroectodermal epithelium. About one third of cells exit the epithelium through ingression and become neuroblasts. Cdc42-compromised embryos lost AJs in the neuroectoderm during neuroblast ingression. In contrast, when neuroblast formation was suppressed, AJs were maintained despite the loss of Cdc42 function. Loss of Cdc42 function caused an increase in the endocytotic uptake of apical proteins, including apical polarity factors such as Crumbs, which are required for AJ stability. In addition, Cdc42 has a second function in regulating endocytotic trafficking, as it is required for the progression of apical cargo from the early to the late endosome. The Par complex acts as an effector for Cdc42 in controlling the endocytosis of apical proteins. This study reveals functional interactions between apical polarity proteins and endocytosis that are critical for stabilizing dynamic basolateral AJs. |
| ISSN | 00219525 |
| e-ISSN | 15408140 |
| Journal | The Journal of Cell Biology |
| Issue Number | 6 |
| Volume Number | 183 |
| Language | English |
| Publisher | Rockefeller University Press (United States) |
| Publisher Date | 2008-12-15 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Adherens Junctions Enzymology Cell Polarity Drosophila Proteins Metabolism Drosophila Melanogaster Endocytosis GTP-Binding Proteins Neural Plate Cytology Animals Embryology Embryo, Nonmammalian Abnormalities Enzyme Activation Epithelium Genes, Dominant Membrane Proteins Models, Biological Multiprotein Complexes Phenotype Protein Kinase C Protein Transport Pyridinium Compounds Quaternary Ammonium Compounds Research Support, Non-U.S. Gov't Cell Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Medicine |
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