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FAPP2, cilium formation, and compartmentalization of the apical membrane in polarized Madin–Darby canine kidney (MDCK) cells
Open accessAbstract
We have analyzed the role of the phosphatidylinositol-4-phosphate adaptor protein-2 (FAPP2), a component of the apical transport machinery, in cilium formation in polarized Madin–Darby canine kidney (MDCK) cells. We show that ciliogenesis is defective in FAPP2 knockdown cells. Furthermore, by using fluorescence recovery after photobleaching studies of domain connectivity and the generalized polarization spectra of Laurdan, we demonstrate that FAPP2 depletion impairs the formation of condensed apical membrane domains. Laurdan staining also revealed that the ciliary membrane has a highly condensed bilayer domain at its base that could function as a fence to separate the ciliary membrane from the surrounding apical membrane. These results indicate that the compartmentalization of the apical membrane in MDCK cells into the ciliary membrane and the surrounding membrane depends on the balance of raft and nonraft domains.
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Metadata
- Authors
- Vieira, O. V., Gaus, K., Verkade, P., Fullekrug, J., Vaz, W. L. C., & Simons, K.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 2006-12-05
- Volume
- 103
- Issue
- 49
- Pages
- 18556-18561
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W2010629357
- Cited by
- 202
- References
- 0
- FWCI
- 7.07
- Type
- journal article
- Language
- en
- Open access
- green
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- Vieira, O. V., Gaus, K., Verkade, P., Fullekrug, J., Vaz, W. L. C., & Simons, K. (2006). FAPP2, cilium formation, and compartmentalization of the apical membrane in polarized Madin–Darby canine kidney (MDCK) cells. Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.0608291103
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