Cited by 53Neurobiology and Insect Physiology ResearchDevelopmental Biology and Gene RegulationGenomics and Chromatin Dynamics

Chinmo is the larval member of the molecular trinity that directs Drosophila metamorphosis

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Truman, James W., Riddiford, Lynn M.·2022·Proceedings of the National Academy of Sciences

Abstract

Significance: The genome of insects with complete metamorphosis contains the instructions for making three distinct body forms, that of the larva, of the pupa, and of the adult. However, the molecular mechanisms by which each gene set is called forth and stably expressed are poorly understood. A half century ago, it was proposed that there was a set of three master genes that inhibited each other’s expression and enabled the expression of genes for each respective stage. We show that the transcription factor chinmo is essential for maintaining the larval stage in Drosophila , and with two other regulatory genes, broad and E93 , makes up the trinity of mutually repressive master genes that underlie insect metamorphosis.

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Crossref · 10.1073/pnas.2201071119

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  • Chinmo is anti-metamorphic and suppresses the expression of broad and E93.

    “Chinmo is anti-metamorphic and suppresses the expression of broad and E93 .”

    From Regulation of metamorphosis in holometabolous insects (2026) · cites this paper as [59]

  • In holometabolous insects, the larval, pupal, and adult stages are determined by three metamorphic genes: chinmo, broad, and E93, respectively.

    “In holometabolous insects, the larval, pupal, and adult stages are determined by three metamorphic genes: chinmo, broad , and E93 , respectively.”

    From Regulation of metamorphosis in holometabolous insects (2026) · cites this paper as [59]

  • Chinmo has a broader role in maintaining the larval stage in Drosophila.

    “Two independent studies in Drosophila subsequently showed that chinmo had a broader role in maintaining the larval stage [59,7].”

    From Regulation of metamorphosis in holometabolous insects (2026) · cites this paper as [59]

  • Chinmo maintains the larval state in both Drosophila and Tribolium, and it inhibits both broad and E93 expression.

    “Chinmo maintains the larval state in both Drosophila [59,7] and Tribolium [30], and it inhibits both broad and E93 expression .”

    From Regulation of metamorphosis in holometabolous insects (2026) · cites this paper as [59]

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Research works printed but not linked: 2

  1. [12]C. M. Williams, F. C. Kafatos, Theoretical aspects of the action of juvenile hormone. Mitt. Schweiz. Entomol. Ges. 44, 151– 162 (1971). [Reprinted in Insect Juvenile Hormones. Chemistry and Action. J. J. Menn and M. Beroza, Eds. (Academic Press, 1972), 29-42.]
  2. [20]E. Ureña, C. Manjón, X. Franch-Marro, D. Martin, E93 specifies adult metamorphosis in insects. Proc. Natl. Acad. Sci. U.S.A. 111, 7024– 7029 (2014). 24778249 PMC4024875

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Authors
Truman, J. W., & Riddiford, L. M.
Affiliations
University of Washington (US)
Corresponding author
Riddiford, Lynn M.
Venue
Proceedings of the National Academy of Sciences
Published
2022-04-04
Volume
119
Issue
15
Pages
e2201071119-e2201071119
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W4224046048
Cited by
53
References
42
Citations by year
2026: 18 · 2025: 15 · 2024: 12 · 2023: 7 · 2022: 1
FWCI
3.87
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
Funders
Howard Hughes Medical Institute (none)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurobiology and Insect Physiology Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
Chinmo, Drosophila metamorphosis, larval development, gene repression, chromatin regulation, transcriptional repression, developmental gene expression
MeSH terms
Animals, Drosophila melanogaster, Larva, Metamorphosis, Biological, Nerve Tissue Proteins, Pupa, Gene Expression Regulation, Developmental, Drosophila Proteins

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