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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Madison, Stephanie L. Nebenführ, Andreas |
| Description | Country affiliation: United States Author Affiliation: Madison SL ( Department of Biochemistry and Cellular and Molecular Biology, University of Tennessee, Knoxville, TN 37996-0840, USA.) |
| Abstract | In plant cells, the Golgi apparatus consists of numerous stacks that, in turn, are composed of several flattened cisternae with a clear cis-to-trans polarity. During normal functioning within living cells, this unusual organelle displays a wide range of dynamic behaviors such as whole stack motility, constant membrane flux through the cisternae, and Golgi enzyme recycling through the ER. In order to further investigate various aspects of Golgi stack dynamics and integrity, we co-expressed pairs of established Golgi markers in tobacco BY-2 cells to distinguish sub-compartments of the Golgi during monensin treatments, movement, and brefeldin A (BFA)-induced disassembly. A combination of cis and trans markers revealed that Golgi stacks remain intact as they move through the cytoplasm. The Golgi stack orientation during these movements showed a slight preference for the cis side moving ahead, but trans cisternae were also found at the leading edge. During BFA treatments, the different sub-compartments of about half of the observed stacks fused with the ER sequentially; however, no consistent order could be detected. In contrast, the ionophore monensin resulted in swelling of trans cisternae while medial and particularly cis cisternae were mostly unaffected. Our results thus demonstrate a remarkable equivalence of the different cisternae with respect to movement and BFA-induced fusion with the ER. In addition, we propose that a combination of dual-label fluorescence microscopy and drug treatments can provide a simple alternative approach to the determination of protein localization to specific Golgi sub-compartments. |
| File Format | HTM / HTML |
| ISSN | 16742052 |
| e-ISSN | 17529867 |
| Journal | Molecular Plant |
| Issue Number | 5 |
| Volume Number | 4 |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2011-09-01 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | Open |
| Subject Keyword | Discipline Botany Discipline Molecular Biology Brefeldin A Pharmacology Golgi Apparatus Metabolism Microscopy, Fluorescence Plant Proteins Tobacco Cytology Cell Line Chemistry Drug Effects Protein Transport Evaluation Studies Research Support, U.s. Gov't, Non-p.h.s. |
| Content Type | Text |
| Resource Type | Article |
| Subject | Plant Science Molecular Biology |
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