1. Developmental Biology
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The Wg and Dpp morphogens regulate gene expression by modulating the frequency of transcriptional bursts

  1. Rachael Bakker
  2. Madhav Mani  Is a corresponding author
  3. Richard W Carthew  Is a corresponding author
  1. Northwestern University, United States
Research Article
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Cite this article as: eLife 2020;9:e56076 doi: 10.7554/eLife.56076

Abstract

Morphogen signaling contributes to the patterned spatiotemporal expression of genes during development. One mode of regulation of signaling-responsive genes is at the level of transcription. Single-cell quantitative studies of transcription have revealed that transcription occurs intermittently, in bursts. Although the effects of many gene regulatory mechanisms on transcriptional bursting have been studied, it remains unclear how morphogen gradients affect this dynamic property of downstream genes. Here we have adapted single molecule fluorescence in situ hybridization (smFISH) for use in the Drosophila wing imaginal disc in order to measure nascent and mature mRNA of genes downstream of the Wg and Dpp morphogen gradients. We compared our experimental results with predictions from stochastic models of transcription, which indicated that the transcription levels of these genes appear to share a common method of control via burst frequency modulation. Our data helps further elucidate the link between developmental gene regulatory mechanisms and transcriptional bursting.

Article and author information

Author details

  1. Rachael Bakker

    Department of Molecular Biosciences, Northwestern University, Evanston, United States
    Competing interests
    The authors declare that no competing interests exist.
  2. Madhav Mani

    Engineering Sciences and Applied Mathematics, Northwestern University, Evanston, United States
    For correspondence
    madhav.mani@northwestern.edu
    Competing interests
    The authors declare that no competing interests exist.
  3. Richard W Carthew

    Department of Molecular Biosciences, Northwestern University, Evanston, United States
    For correspondence
    r-carthew@northwestern.edu
    Competing interests
    The authors declare that no competing interests exist.
    ORCID icon "This ORCID iD identifies the author of this article:" 0000-0003-0343-0156

Funding

National Institutes of Health (R35GM118144)

  • Richard W Carthew

National Institutes of Health (T32CA080621)

  • Rachael Bakker

National Science Foundation (1764421)

  • Madhav Mani
  • Richard W Carthew

Simons Foundation (597491)

  • Madhav Mani
  • Richard W Carthew

The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.

Reviewing Editor

  1. Hugo J Bellen, Baylor College of Medicine, United States

Publication history

  1. Received: February 16, 2020
  2. Accepted: June 18, 2020
  3. Accepted Manuscript published: June 22, 2020 (version 1)

Copyright

© 2020, Bakker et al.

This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.

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