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- W4311449818 abstract "Abstract In mammals, insulators contribute to the regulation of loop extrusion to organize chromatin into topologically associating domains. In Drosophila the role of insulators in 3D genome organization is, however, under current debate. Here, we addressed this question by combining bioinformatics analysis and multiplexed chromatin imaging. We describe a class of Drosophila insulators enriched at regions forming preferential chromatin interactions genome-wide. Notably, most of these 3D interactions do not involve TAD borders. Multiplexed imaging shows that these interactions occur infrequently, and only rarely involve multiple genomic regions coalescing together in space in single cells. Finally, we show that non-border preferential 3D interactions enriched in this class of insulators arise before TADs and transcription during Drosophila development. Our results are inconsistent with insulators forming stable hubs in single cells, and instead suggest that they fine-tune existing 3D chromatin interactions, providing an additional regulatory layer for transcriptional regulation." @default.
- W4311449818 created "2022-12-26" @default.
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- W4311449818 date "2022-12-14" @default.
- W4311449818 modified "2023-10-18" @default.
- W4311449818 title "3D chromatin interactions involving<i>Drosophila</i>insulators are infrequent but preferential and arise before TADs and transcription" @default.
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- W4311449818 doi "https://doi.org/10.1101/2022.12.12.520036" @default.
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