Cohesin dependent compaction of mitotic chromosomes
Cohesin dependent compaction of mitotic chromosomes
复制标题
有丝分裂染色体的粘连蛋白依赖性压缩
DOI:
10.1101/094946
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
Schalbetter S
中科院分区:
文献类型:
--
作者:
Schalbetter S
Structural Maintenance of Chromosomes (SMC) protein complexes are key determinants of chromosome conformation. Using Hi-C and polymer modelling, we study how cohesin and condensin, two deeply-conserved SMC complexes, organize chromosomes in budding yeast. The canonical role of cohesins is to co-align sister chromatids whilst condensins generally compact mitotic chromosomes. We find strikingly different roles in budding yeast mitosis. First, cohesin is responsible for compacting mitotic chromosomes arms, independent of and in addition to its role in sister-chromatid cohesion. Cohesin dependent mitotic chromosome compaction can be fully accounted for throughcis-looping of chromatin by loop extrusion. Second, condensin is dispensable for compaction along chromosomal arms and instead plays a specialized role, structuring rDNA and peri-centromeric regions. Our results argue that the conserved mechanism of SMC complexes is to form chromatin loops and that SMC-dependent looping is readily deployed in a range of contexts to functionally organize chromosomes.HighlightsCohesin compacts mitotic chromosomes independently of sister chromatid cohesion.Formation ofcis-loops by loop extrusion fully accounts for cohesin-mediated compaction.Condensin is not required for mitotic chromosome compaction of yeast chromosome armsCondensin has a focused pre-anaphase role at centromeres and rDNA in yeast
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影响因子:
8.8
作者:
Stigler J;Çamdere GÖ;Koshland DE;Greene EC
通讯作者:
Greene EC
影响因子:
9.2
作者:
Steffensen, S;Coelho, PA;Sunkel, CE
通讯作者:
Sunkel, CE
影响因子:
3.3
作者:
Ouspenski, II;Cabello, OA;Brinkley, BR
通讯作者:
Brinkley, BR
影响因子:
2.6
作者:
McNairn, Adrian J.;Gerton, Jennifer L.
通讯作者:
Gerton, Jennifer L.
影响因子:
64.8
作者:
通讯作者:
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