SMC complexes differentially compact mitotic chromosomes according to genomic context.
SMC complexes differentially compact mitotic chromosomes according to genomic context.
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DOI:
10.1038/ncb3594
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发表时间:
2017-09
影响因子:
21.3
通讯作者:
Baxter J
中科院分区:
文献类型:
--
作者:
Schalbetter SA;Goloborodko A;Fudenberg G;Belton JM;Miles C;Yu M;Dekker J;Mirny L;Baxter J
Structural Maintenance of Chromosomes (SMC) protein complexes are key determinants of chromosome conformation. Using Hi-C and polymer modeling, we study how cohesin and condensin, two deeply conserved SMC complexes, organize chromosomes in the budding yeast Saccharomyces cerevisiae. The canonical role of cohesin is to co-align sister chromatids whilst condensin generally compacts mitotic chromosomes. We find strikingly different roles for the two complexes in budding yeast mitosis. First, cohesin is responsible for compacting mitotic chromosome arms, independently of sister chromatid cohesion. Polymer simulations demonstrate this role can be fully accounted for through cis-looping of chromatin. Second, condensin is generally dispensable for compaction along chromosome arms. Instead it plays a targeted role compacting the rDNA proximal regions and promoting resolution of peri-centromeric regions. Our results argue that the conserved mechanism of SMC complexes is to form chromatin loops and that distinct SMC-dependent looping activities are selectively deployed to appropriately compact chromosomes.
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影响因子:
64.5
作者:
Dekker J;Mirny L
通讯作者:
Mirny L
影响因子:
3
作者:
Eastman, Peter;Pande, Vijay S.
通讯作者:
Pande, Vijay S.
影响因子:
16
作者:
Haering, CH;Schoffnegger, D;Löwe, J
通讯作者:
Löwe, J
影响因子:
10.5
作者:
D'Ambrosio, Claudio;Schmidt, Christine Katrin;Uhlmann, Frank
通讯作者:
Uhlmann, Frank
DOI:
10.1007/bf00382269
发表时间:
1979-01-01
期刊:
MOLECULAR AND GENERAL GENETICS
影响因子:
--
作者:
ELLIOTT, SG;MCLAUGHLIN, CS
通讯作者:
MCLAUGHLIN, CS