Coexisting Liquid Phases Underlie Nucleolar Subcompartments.
Coexisting Liquid Phases Underlie Nucleolar Subcompartments.
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DOI:
10.1016/j.cell.2016.04.047
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发表时间:
2016-06-16
期刊:
影响因子:
64.5
通讯作者:
Brangwynne CP
中科院分区:
文献类型:
--
作者:
Feric M;Vaidya N;Harmon TS;Mitrea DM;Zhu L;Richardson TM;Kriwacki RW;Pappu RV;Brangwynne CP
The nucleolus and other ribonucleoprotein (RNP) bodies are membrane-less organelles that appear to assemble through phase separation of their molecular components. However, many such RNP bodies contain internal sub-compartments, and the mechanism of their formation remains unclear. Here, we combine in vivo and in vitro studies, together with computational modeling, to show that sub-compartments within the nucleolus represent distinct, coexisting liquid phases. Consistent with their in vivo immiscibility, purified nucleolar proteins phase separate into droplets containing distinct non-coalescing phases that are remarkably similar to nucleoli in vivo. This layered droplet organization is caused by differences in the biophysical properties of the phases – particularly droplet surface tension – which arises from sequence-encoded features of their macromolecular components. These results suggest that phase separation can give rise to multilayered liquids that may facilitate sequential RNA processing reactions in a variety of RNP bodies.
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影响因子:
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通讯作者:
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DOI:
10.1083/jcb.200612048
发表时间:
2007-05-21
期刊:
The Journal of cell biology
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