Cell cycle-specific cleavage of Scc2 regulates its cohesin deposition activity
| العنوان: | Cell cycle-specific cleavage of Scc2 regulates its cohesin deposition activity |
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| المؤلفون: | Paul C. Megee, Julie Woodman, Monika Dzieciatkowska, Michael Trejo, Kirk C. Hansen, Nancy Luong, Tyler Fara |
| المصدر: | Proceedings of the National Academy of Sciences. 111:7060-7065 |
| بيانات النشر: | Proceedings of the National Academy of Sciences, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Saccharomyces cerevisiae Proteins, Genotype, Chromosomal Proteins, Non-Histone, DNA repair, Molecular Sequence Data, Cell Cycle Proteins, Saccharomyces cerevisiae, Biology, Chromosome segregation, Chromosomal Instability, Chromosome Segregation, Animals, Amino Acid Sequence, Phosphorylation, Cell Cycle Protein, Multidisciplinary, Cohesin, Chromatin binding, Cell Cycle, Biological Sciences, Cell cycle, Molecular biology, Chromatin, Cell biology, Establishment of sister chromatid cohesion, Rabbits, biological phenomena, cell phenomena, and immunity |
| الوصف: | Sister chromatid cohesion (SCC), efficient DNA repair, and the regulation of some metazoan genes require the association of cohesins with chromosomes. Cohesins are deposited by a conserved heterodimeric loading complex composed of the Scc2 and Scc4 proteins in Saccharomyces cerevisiae, but how the Scc2/Scc4 deposition complex regulates the spatiotemporal association of cohesin with chromosomes is not understood. We examined Scc2 chromatin association during the cell division cycle and found that the affinity of Scc2 for chromatin increases biphasically during the cell cycle, increasing first transiently in late G1 phase and then again later in G2/M. Inactivation of Scc2 following DNA replication reduces cellular viability, suggesting that this post S-phase increase in Scc2 chromatin binding affinity is biologically relevant. Interestingly, high and low Scc2 chromatin binding levels correlate strongly with the presence of full-length or amino-terminally cleaved forms of Scc2, respectively, and the appearance of the cleaved Scc2 species is promoted in vitro either by treatment with specific cell cycle-staged cellular extracts or by dephosphorylation. Importantly, Scc2 cleavage eliminates Scc2-Scc4 physical interactions, and an scc2 truncation mutant that mimics in vivo Scc2 cleavage is defective for cohesin deposition. These observations suggest a previously unidentified mechanism for the spatiotemporal regulation of cohesin association with chromosomes through cell cycle regulation of Scc2 cohesin deposition activity by Scc2 dephosphorylation and cleavage. |
| تدمد: | 1091-6490 0027-8424 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::72e23c46da1ec88786e6561c83f4fb48 https://doi.org/10.1073/pnas.1321722111 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....72e23c46da1ec88786e6561c83f4fb48 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10916490 00278424 |
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