Organization of the mitotic chromosome.
Organization of the mitotic chromosome.
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DOI:
10.1126/science.1236083
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发表时间:
2013-11-22
期刊:
影响因子:
--
通讯作者:
Dekker J
中科院分区:
文献类型:
--
作者:
Naumova N;Imakaev M;Fudenberg G;Zhan Y;Lajoie BR;Mirny LA;Dekker J
Mitotic chromosomes are among the most recognizable structures in the cell, yet for over a century their internal organization remains largely unsolved. We applied chromosome conformation capture methods, 5C and Hi-C, across the cell cycle and revealed two alternative three-dimensional folding states of the human genome. We show that the highly compartmentalized and cell-type-specific organization described previously for non-synchronous cells is restricted to interphase. In metaphase, we identify a homogenous folding state, which is locus-independent, common to all chromosomes, and consistent among cell types, suggesting a general principle of metaphase chromosome organization. Using polymer simulations, we find that metaphase Hi-C data is inconsistent with classic hierarchical models, and is instead best described by a linearly-organized longitudinally compressed array of consecutive chromatin loops.
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