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SWI/SNF chromatin remodeling controls Notch-responsive enhancer accessibility

Zoe Pillidge, View ORCID ProfileSarah J Bray
doi: https://doi.org/10.1101/399501
Zoe Pillidge
1Dept. of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge, CB2 3DY, UK
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Sarah J Bray
1Dept. of Physiology, Development and Neuroscience, University of Cambridge, Downing Street, Cambridge, CB2 3DY, UK
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Abstract

Notch signaling plays a key role in many cell fate decisions during development by directing different gene expression programs via the transcription factor CSL, known as Su(H) in Drosophila. Which target genes are responsive to Notch signaling is influenced by the chromatin state of enhancers, yet how this is regulated is not fully known. Detecting an increase in the histone variant H3.3 in response to Notch signaling, we tested which chromatin remodelers or histone chaperones were required for the changes in enhancer accessibility to Su(H) binding. This revealed a crucial role for the Brahma SWI/SNF chromatin remodeling complex in conferring enhancer accessibility and enabling the transcriptional response. The Notch-responsive regions had high levels of nucleosome turnover which were dependent on the Brahma complex, increased with Notch signaling and primarily involved histone H3.3. Together these results highlight the importance of SWI/SNF-mediated nucleosome turnover in rendering enhancers responsive to Notch.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted August 25, 2018.
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SWI/SNF chromatin remodeling controls Notch-responsive enhancer accessibility
Zoe Pillidge, Sarah J Bray
bioRxiv 399501; doi: https://doi.org/10.1101/399501
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SWI/SNF chromatin remodeling controls Notch-responsive enhancer accessibility
Zoe Pillidge, Sarah J Bray
bioRxiv 399501; doi: https://doi.org/10.1101/399501

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