Light-activated macromolecular phase separation modulates transcription by reconfiguring chromatin interactions.
Light-activated macromolecular phase separation modulates transcription by reconfiguring chromatin interactions.
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DOI:
10.1126/sciadv.adg1123
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发表时间:
2023-03-31
期刊:
影响因子:
13.6
通讯作者:
Xu, Jian
中科院分区:
文献类型:
--
作者:
Kim, Yoon Jung;Lee Jr, Michael;Lee, Yi-Tsang;Jing, Ji;Sanders, Jacob T.;Botten, Giovanni A.;He, Lian;Lyu, Junhua;Zhang, Yuannyu;Mettlen, Marcel;Ly, Peter;Zhou, Yubin;Xu, Jian
Biomolecular condensates participate in the regulation of gene transcription, yet the relationship between nuclear condensation and transcriptional activation remains elusive. Here, we devised a biotinylated CRISPR-dCas9–based optogenetic method, light-activated macromolecular phase separation (LAMPS), to enable inducible formation, affinity purification, and multiomic dissection of nuclear condensates at the targeted genomic loci. LAMPS-induced condensation at enhancers and promoters activates endogenous gene transcription by chromatin reconfiguration, causing increased chromatin accessibility and de novo formation of long-range chromosomal loops. Proteomic profiling of light-induced condensates by dCas9-mediated affinity purification uncovers multivalent interaction-dependent remodeling of macromolecular composition, resulting in the selective enrichment of transcriptional coactivators and chromatin structure proteins. Our findings support a model whereby the formation of nuclear condensates at native genomic loci reconfigures chromatin architecture and multiprotein assemblies to modulate gene transcription. Hence, LAMPS facilitates mechanistic interrogation of the relationship between nuclear condensation, genome structure, and gene transcription in living cells. LAMPS enables inducible formation, affinity purification, and multi-omic dissection of nuclear condensates in living cells.
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影响因子:
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Langmead, Ben;Salzberg, Steven L.
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Salzberg, Steven L.
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Wang GG
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Xu J
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Chong, Shasha;Graham, Thomas G. W.;Tjian, Robert
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