Cited by 338Genomics and Chromatin DynamicsDevelopmental Biology and Gene RegulationEpigenetics and DNA Methylation

Zelda Binding in the Early Drosophila melanogaster Embryo Marks Regions Subsequently Activated at the Maternal-to-Zygotic Transition

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Harrison, Melissa M., Li, Xiao-Yong, Kaplan, Tommy, Botchan, Michael R., Eisen, Michael B.·2011·PLoS Genetics

Abstract

The earliest stages of development in most metazoans are driven by maternally deposited proteins and mRNAs, with widespread transcriptional activation of the zygotic genome occurring hours after fertilization, at a period known as the maternal-to-zygotic transition (MZT). In Drosophila, the MZT is preceded by the transcription of a small number of genes that initiate sex determination, patterning, and other early developmental processes; and the zinc-finger protein Zelda (ZLD) plays a key role in their transcriptional activation. To better understand the mechanisms of ZLD activation and the range of its targets, we used chromatin immunoprecipitation coupled with high-throughput sequencing (ChIP-Seq) to map regions bound by ZLD before (mitotic cycle 8), during (mitotic cycle 13), and after (late mitotic cycle 14) the MZT. Although only a handful of genes are transcribed prior to mitotic cycle 10, we identified thousands of regions bound by ZLD in cycle 8 embryos, most of which remain bound through mitotic cycle 14. As expected, early ZLD-bound regions include the promoters and enhancers of genes transcribed at this early stage. However, we also observed ZLD bound at cycle 8 to the promoters of roughly a thousand genes whose first transcription does not occur until the MZT and to virtually all of the thousands of known and presumed enhancers bound at cycle 14 by transcription factors that regulate patterned gene activation during the MZT. The association between early ZLD binding and MZT activity is so strong that ZLD binding alone can be used to identify active promoters and regulatory sequences with high specificity and selectivity. This strong early association of ZLD with regions not active until the MZT suggests that ZLD is not only required for the earliest wave of transcription but also plays a major role in activating the genome at the MZT.

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  • In Drosophila, Zelda is critical for lowering the nucleosome barrier at enhancers for genes driving zygotic gene activation.

    “In Drosophila, the Zinc Finger Early Drosophila Activator (Zelda) is critical for lowering the nucleosome barrier at enhancers for genes driving zygotic gene activation [33–35].”

    From Transcriptional enhancers and their communication with gene promoters (2021) · cites this paper as [34]

    The Discussion (page unavailable) says Zelda is important at promoters and enhancers and proposes that it promotes zygotic genome activation by controlling chromatin accessibility. But it does not establish that Zelda lowers a nucleosome barrier; it explicitly allows that Zelda may maintain chromatin that is already accessible rather than actively open it. (LLM, conf=0.88)

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Authors
Harrison, M. M., Li, X.-Y., Kaplan, T., Botchan, M. R., & Eisen, M. B.
Affiliations
  • University of California, Berkeley (US)
  • QB3 (US)
Corresponding author
Eisen, Michael B.
Venue
PLoS Genetics
Published
2011-10-20
Volume
7
Issue
10
Pages
e1002266
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W2004533772
Cited by
338
References
41
Citations by year
2026: 14 · 2025: 17 · 2024: 23 · 2023: 23 · 2022: 20 · 2021: 27 · 2020: 23 · 2019: 26 · 2018: 24 · 2017: 31 · 2016: 20 · 2015: 22 · 2014: 20 · 2013: 28 · 2012: 18
FWCI
8.84
Type
journal article
Language
en
Open access
Locations
  • PLoS Genetics (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
  • Howard Hughes Medical Institute
  • National Institutes of Health (CA30490)
  • National Human Genome Research Institute (HG002779, R01HG002779)
  • National Cancer Institute (R37 CA3049, R37CA030490)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
Keywords
Zelda, maternal-to-zygotic transition, Drosophila melanogaster embryo, transcriptional activation, enhancer binding, promoter binding, mitotic cycle, chromatin binding, sex determination
MeSH terms
Animals, Drosophila melanogaster, Female, Mitosis, Nuclear Proteins, Promoter Regions, Genetic, Protein Binding, Transcription Factors, Transcription, Genetic, Zygote, Transcriptional Activation, Genome, Gene Expression Regulation, Developmental, Body Patterning, Sex Determination Processes, Drosophila Proteins, Embryonic Development, Chromatin Immunoprecipitation

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