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- W2912805538 abstract "Heat shock (HS) initiates rapid, extensive, and evolutionarily conserved changes in transcription that are accompanied by chromatin decondensation and nucleosome loss at heat shock loci. Here we have employed in situ Hi-C to determine how heat stress affects long-range chromatin conformation in human and Drosophila cells. We found that compartments, topologically-associated domains (TADs), and looping interactions all remain unchanged by an acute HS. Knockdown of Heat Shock Factor 1 (HSF1), the master transcriptional regulator of the HS response, identified HSF1-dependent genes and revealed that up-regulation is often mediated by distal HSF1 bound enhancers. HSF1-dependent genes were usually found in the same TAD as the nearest HSF1 binding site. However, the HSF1 binding sites and the target promoters did not exhibit a focal increase in contact frequencies compared with surrounding regions, nor did we find evidence of increased contact frequency following HS. Integrating information about HSF1 binding strength, RNA polymerase abundance at the enhancer, and contact frequency with a target promoter in the non-heat shock (NHS) condition accurately predicted which up-regulated genes were direct targets of HSF1 during HS. Our results suggest that the chromatin conformation necessary for a robust HS response is pre-established in normal (uninduced) cells of diverse metazoan species." @default.
- W2912805538 created "2019-02-21" @default.
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- W2912805538 date "2019-01-22" @default.
- W2912805538 modified "2023-10-16" @default.
- W2912805538 title "Chromatin conformation remains stable upon extensive transcriptional changes driven by heat shock" @default.
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- W2912805538 doi "https://doi.org/10.1101/527838" @default.
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