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| Content Provider | PubMed Central |
|---|---|
| Author | Slaughter, Brian D. Unruh, Jay R. Das, Arupratan Smith, Sarah E. Rubinstein, Boris Rong, Li |
| Abstract | Actin-based vesicular trafficking of Cdc42, leading to a polarized concentration of the GTPase, has been implicated in cell polarization, but it was recently debated whether this mechanism allows stable maintenance of cell polarity. Here we show that endocytosis and exocytosis are spatially segregated in the polar plasma membrane, with sites of exocytosis correlating with microdomains of higher concentration and slower diffusion of Cdc42 compared to surrounding regions. Numerical simulations using experimentally obtained diffusion coefficients and trafficking geometry revealed that non-uniform membrane diffusion of Cdc42 in fact enables temporally sustained cell polarity. We show further that phosphatidylserine (PS), a phospholipid recently found to be crucial for cell polarity, is enriched in Cdc42 microdomains and weakening a potential interaction between PS and Cdc42 enhanced Cdc42 diffusion in the microdomains but impeded the strength of polarization. These findings demonstrate a critical role for membrane microdomains in vesicular trafficking mediated cell polarity. |
| Related Links | http://dx.doi.org/10.1038/ncomms2370 |
| Ending Page | 1380 |
| Page Count | 1 |
| Starting Page | 1380 |
| File Format | |
| ISSN | 20411723 |
| e-ISSN | 20411723 |
| Journal | Nature communications |
| Volume Number | 4 |
| Language | English |
| Publisher Date | 2013-01-01 |
| Access Restriction | Open |
| Subject Keyword | Biochemistry, Genetics and Molecular Biology(all) Physics and Astronomy(all) Chemistry(all) Research in Higher Education |
| Content Type | Text |
| Resource Type | Article |
| Subject | Chemistry Physics and Astronomy Biochemistry, Genetics and Molecular Biology |
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