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| Item Type: | Article |
|---|---|
| Title: | Dynamics of DNA replication factories in living cells |
| Creators Name: | Leonhardt, H., Rahn, H.P., Weinzierl, P., Sporbert, A., Cremer, T., Zink, D. and Cardoso, M.C. |
| Abstract: | DNA replication occurs in microscopically visible complexes at discrete sites (replication foci) in the nucleus. These foci consist of DNA associated with replication machineries, i.e., large protein complexes involved in DNA replication. To study the dynamics of these nuclear replication foci in living cells, we fused proliferating cell nuclear antigen (PCNA), a central component of the replication machinery, with the green fluorescent protein (GFP). Imaging of stable cell lines expressing low levels of GFP-PCNA showed that replication foci are heterogeneous in size and lifetime. Time-lapse studies revealed that replication foci clearly differ from nuclear speckles and coiled bodies as they neither show directional movements, nor do they seem to merge or divide. These four dimensional analyses suggested that replication factories are stably anchored in the nucleus and that changes in the pattern occur through gradual, coordinated, but asynchronous, assembly and disassembly throughout S phase. |
| Keywords: | Cell Cycle, DNA Replication Foci, Green Fluorescent Protein, Nuclear Organization, Proliferating Cell Nuclear Antigen, Animals, Mice |
| Source: | Journal of Cell Biology |
| ISSN: | 0021-9525 |
| Publisher: | Rockefeller University Press |
| Volume: | 149 |
| Number: | 2 |
| Page Range: | 271-279 |
| Date: | 17 April 2000 |
| Additional Information: | Copyright (c) 2000 by The Rockefeller University Press |
| Official Publication: | http://www.jcb.org/cgi/content/abstract/149/2/271 |
| PubMed: | View item in PubMed |
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