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Condensin and Repo-Man–PP1 co-operate in the regulation of chromosome architecture during mitosis
Open accessAbstract
The reversible condensation of chromosomes during cell division remains a classic problem in cell biology. Condensation requires the condensin complex in certain experimental systems, but not in many others. Anaphase chromosome segregation almost always fails in condensin-depleted cells, leading to the formation of prominent chromatin bridges and cytokinesis failure. Here, live-cell analysis of chicken DT40 cells bearing a conditional knockout of condensin subunit SMC2 revealed that condensin-depleted chromosomes abruptly lose their compact architecture during anaphase and form massive chromatin bridges. The compact chromosome structure can be preserved and anaphase chromosome segregation rescued by preventing the targeting subunit Repo-Man from recruiting protein phosphatase 1 (PP1) to chromatin at anaphase onset. This study identifies an activity critical for mitotic chromosome structure that is inactivated by Repo-Man–PP1 during anaphase. This activity, provisionally termed 'regulator of chromosome architecture' (RCA), cooperates with condensin to preserve the characteristic chromosome architecture during mitosis.
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Cited by
Functional and quantitative proteomics using SILAC
Mann, M. (2006) · Nature Reviews Molecular Cell Biology · doi:10.1038/nrm2067 · Cited by 931
Lukas, C., Savic, V., Bekker-Jensen, S., Doil, C., Neumann, B., Sølvhøj Pedersen, R., Grøfte, M., Chan, K. L., Hickson, I. D., Bartek, J., et al. (2011) · Nature Cell Biology · doi:10.1038/ncb2201 · Cited by 667
Chromatin Higher-order Structure and Dynamics
Woodcock, C. L., & Ghosh, R. P. (2010) · Cold Spring Harbor Perspectives in Biology · doi:10.1101/cshperspect.a000596 · Cited by 384
Metadata
- Authors
- Vagnarelli, P., Hudson, D. F., Ribeiro, S. A., Trinkle-Mulcahy, L., Spence, J. M., Lai, F., Farr, C. J., Lamond, A. I., & Earnshaw, W. C.
- Venue
- Nature Cell Biology
- Published
- 2006-09-24
- Volume
- 8
- Issue
- 10
- Pages
- 1133-1142
- ISSN
- 1465-7392 (ISSN-L)
- 1476-4679
- OpenAlex
- W2094212271
- Cited by
- 217
- References
- 0
- FWCI
- 5.12
- Type
- journal article
- Language
- en
- Open access
- green
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- Vagnarelli, P., Hudson, D. F., Ribeiro, S. A., Trinkle-Mulcahy, L., Spence, J. M., Lai, F., Farr, C. J., Lamond, A. I., & Earnshaw, W. C. (2006). Condensin and Repo-Man–PP1 co-operate in the regulation of chromosome architecture during mitosis. Nature Cell Biology. https://doi.org/10.1038/ncb1475
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