Apparent RNA bridging between PRC2 and chromatin is an artefact of non-specific chromatin precipitation upon RNA degradation
Apparent RNA bridging between PRC2 and chromatin is an artefact of non-specific chromatin precipitation upon RNA degradation
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PRC2 和染色质之间的明显 RNA 桥是 RNA 降解时非特异性染色质沉淀的产物
DOI:
10.1101/2023.08.16.553503
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发表时间:
2023
期刊:
影响因子:
--
通讯作者:
Hickman A
中科院分区:
文献类型:
--
作者:
Hickman A
Polycomb repressive complex 2 (PRC2) modifies chromatin to maintain repression of genes specific for other cell lineages.In vitro, RNA inhibits PRC2 activity, but the effect of RNA on PRC2 in cells is less clear, with studies concluding that RNA either antagonizes or promotes PRC2 chromatin association. The addition of RNase A to chromatin immunoprecipitation reactions has been reported to reduce detection of PRC2 target sites, suggesting the existence of RNA bridges connecting PRC2 to chromatin. Here, we show that the apparent loss of PRC2 chromatin association after RNase A treatment is due to non-specific chromatin precipitation. RNA degradation precipitates chromatin out of solution, thereby masking enrichment of specific DNA sequences in chromatin immunoprecipitation reactions. Maintaining chromatin solubility by the addition of poly-L-glutamic acid rescues detection of PRC2 chromatin occupancy upon RNA degradation. These findings undermine support for the model that RNA bridges PRC2 and chromatin in cells.
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作者:
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通讯作者:
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影响因子:
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DOI:
10.1101/2023.08.16.553488
发表时间:
2024
期刊:
bioRxiv
影响因子:
--
作者:
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DOI:
10.1073/pnas.0904715106
发表时间:
2009-07-14
影响因子:
11.1
作者:
Khalil, Ahmad M.;Guttman, Mitchell;Rinn, John L.
通讯作者:
Rinn, John L.