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Cell. 2016 Jul 14;166(2):358-368. doi: 10.1016/j.cell.2016.05.025. Epub 2016 Jun 9.

Enhancer Control of Transcriptional Bursting.

Author information

1
Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA.
2
Lewis-Sigler Institute for Integrative Genomics, Princeton University, Princeton, NJ 08544, USA; Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA. Electronic address: msl2@princeton.edu.

Abstract

Transcription is episodic, consisting of a series of discontinuous bursts. Using live-imaging methods and quantitative analysis, we examine transcriptional bursting in living Drosophila embryos. Different developmental enhancers positioned downstream of synthetic reporter genes produce transcriptional bursts with similar amplitudes and duration but generate very different bursting frequencies, with strong enhancers producing more bursts than weak enhancers. Insertion of an insulator reduces the number of bursts and the corresponding level of gene expression, suggesting that enhancer regulation of bursting frequency is a key parameter of gene control in development. We also show that linked reporter genes exhibit coordinated bursting profiles when regulated by a shared enhancer, challenging conventional models of enhancer-promoter looping.

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PMID:
27293191
PMCID:
PMC4970759
DOI:
10.1016/j.cell.2016.05.025
[Indexed for MEDLINE]
Free PMC Article

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