Cited by 44Genomics and Chromatin DynamicsGene Regulatory Network AnalysisDevelopmental Biology and Gene Regulation

Signal Integration by Shadow Enhancers and Enhancer Duplications Varies across the Drosophila Embryo

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Scholes, Clarissa, Biette, Kelly M., Harden, Timothy T., DePace, Angela H.·2019·Cell Reports

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Abstract

Transcription of developmental genes is controlled by multiple enhancers. Frequently, more than one enhancer can activate transcription from the same promoter in the same cells. How is regulatory information from multiple enhancers combined to determine the overall expression output? We measure nascent transcription driven by a pair of shadow enhancers, each enhancer of the pair separately, and each duplicated, using live imaging in Drosophila embryos. This set of constructs allows us to quantify the input-output function describing signal integration by two enhancers. We show that signal integration performed by these shadow enhancers and duplications varies across the expression pattern, implying that how their activities are combined depends on the transcriptional regulators bound to the enhancers in different parts of the embryo. Characterizing signal integration by multiple enhancers is a critical step in developing conceptual and computational models of gene expression at the locus level, where multiple enhancers control transcription together.

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Crossref · 10.1016/j.celrep.2019.01.115

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  • Some deviations from enhancer additivity could potentially be explained by steric constraints arising from enhancer competition or involvement of pioneer enhancers, but these considerations may not readily explain other reported cases.

    “Some deviations from enhancer additivity could potentially be explained by steric constraints arising from enhancer competition [519] or involvement of “pioneer enhancers” [525], but these considerations may not readily explain other reported cases [523, 526].”

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Authors
Scholes, C., Biette, K. M., Harden, T. T., & DePace, A. H.
Affiliations
Harvard University (US)
Corresponding author
DePace, Angela H.
Venue
Cell Reports
Publisher
Elsevier BV
Published
2019-02
Volume
26
Issue
9
Pages
2407-2418.e5
ISSN
2211-1247 (ISSN-L)
OpenAlex
W2917637208
Cited by
44
References
59
Citations by year
2026: 3 · 2025: 4 · 2024: 5 · 2023: 6 · 2022: 6 · 2021: 12 · 2020: 7 · 2019: 1
FWCI
2.15
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by-nc-nd)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Science Foundation (IOS-1452557)
  • NIH (4U01GM103804-04)
  • Giovanni Armenise-Harvard Foundation
  • Harvard Graduate Society Merit Fellowship
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gene Regulatory Network Analysis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Keywords
nascent transcription, input-output function, transcriptional regulation, Drosophila embryo, live imaging, gene expression patterning, transcription factors
MeSH terms
Animals, Drosophila melanogaster, Embryo, Nonmammalian, Enhancer Elements, Genetic, Promoter Regions, Genetic, Gene Expression Regulation, Developmental, Drosophila Proteins, Kruppel-Like Transcription Factors

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