Spatiotemporal regulation of liquid-like condensates in epigenetic inheritance.

Spatiotemporal regulation of liquid-like condensates in epigenetic inheritance.
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表观遗传遗传中液态冷凝物的时空调节。

DOI:
10.1038/s41586-018-0132-0
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发表时间:
2018-05
期刊:
影响因子:
64.8
通讯作者:
Kennedy S
Kennedy S
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Wan G;Fields BD;Spracklin G;Shukla A;Phillips CM;Kennedy S

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Non-membrane bound organelles such as nucleoli, processing bodies, cajal bodies, and germ granules form via spontaneous self-assembly of specific proteins and RNAs. How these biomolecular condensates form and interact are poorly understood. Here we identify two proteins, ZNFX-1 and WAGO-4, that localize to C. elegans germ granules (P granules) in early germline blastomeres. Later in germline development, ZNFX-1/WAGO-4 separate from P granules to define an independent liquid-like condensate that we term the Z granule. In adult germ cells, Z granules assemble into ordered tri-condensate assemblages with P granules and Mutator foci, which we term the PZM granule. Finally, we show that one biological function of ZNFX-1 and WAGO-4 is to interact with silencing RNAs in the C. elegans germline to direct transgenerational epigenetic inheritance (TEI). We speculate that the temporal and spatial ordering of liquid droplet organelles may help cells organize and coordinate the complex RNA processing pathways underlying gene regulatory systems, such as RNA-directed TEI.
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