Cited by 53Developmental Biology and Gene RegulationMicroRNA in disease regulationMarine Invertebrate Physiology and Ecology

Unicellular origin of the animal microRNA machinery

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Bråte, Jon, Neumann, Ralf S., Fromm, Bastian, Haraldsen, Arthur A.B., Tarver, James E., Suga, Hiroshi, Donoghue, Philip C.J., Peterson, Kevin J. +3 more·2018·Current Biology

Published version of a preprint

Abstract

The emergence of multicellular animals was associated with an increase in phenotypic complexity and with the acquisition of spatial cell differentiation and embryonic development. Paradoxically, this phenotypic transition was not paralleled by major changes in the underlying developmental toolkit and regulatory networks. In fact, most of these systems are ancient, established already in the unicellular ancestors of animals [1-5]. In contrast, the Microprocessor protein machinery, which is essential for microRNA (miRNA) biogenesis in animals, as well as the miRNA genes themselves produced by this Microprocessor, have not been identified outside of the animal kingdom [6]. Hence, the Microprocessor, with the key proteins Pasha and Drosha, is regarded as an animal innovation [7-9]. Here, we challenge this evolutionary scenario by investigating unicellular sister lineages of animals through genomic and transcriptomic analyses. We identify in Ichthyosporea both Drosha and Pasha (DGCR8 in vertebrates), indicating that the Microprocessor complex evolved long before the last common ancestor of animals, consistent with a pre-metazoan origin of most of the animal developmental gene elements. Through small RNA sequencing, we also discovered expressed bona fide miRNA genes in several species of the ichthyosporeans harboring the Microprocessor. A deep, pre-metazoan origin of the Microprocessor and miRNAs comply with a view that the origin of multicellular animals was not directly linked to the innovation of these key regulatory components.

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  1. [43]Haas B.J. Papanicolaou A. Yassour M. Grabherr M. Philip D. Bowden J. Couger M.B. Eccles D. Li B. Macmanes M.D. De novo transcript sequence reconstruction from RNA-seq: reference generation and analysis with Trinity Nat. Protoc. 8 2014 1 43 PMC3875132 23845962

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Authors
Bråte, J., Neumann, R. S., Fromm, B., Haraldsen, A. A. B., Tarver, J. E., Suga, H., Donoghue, P. C. J., Peterson, K. J., Ruiz-Trillo, I., Grini, P. E., & Shalchian-Tabrizi, K.
Affiliations
  • University of Oslo (NO)
  • Oslo University Hospital (NO)
  • University of Bristol (GB)
  • Prefectural University of Hiroshima (JP)
  • Dartmouth College (US)
Venue
Current Biology
Publisher
Elsevier BV
Published
2018-10
Volume
28
Issue
20
Pages
3288-3295.e5
ISSN
0960-9822 (ISSN-L)
OpenAlex
W2897291496
Cited by
53
References
87
Citations by year
2026: 1 · 2025: 5 · 2024: 3 · 2023: 9 · 2022: 8 · 2021: 6 · 2020: 6 · 2019: 10 · 2018: 3 · 2016: 1 · 2012: 1
FWCI
2.22
Type
journal article
Language
en
Open access
Locations
  • Current Biology (publishedVersion, cc-by-nc-nd)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by-nc-nd)
  • PubMed Central (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Explore Bristol Research (submittedVersion, cc-by-nc-nd)
  • Bristol Research (University of Bristol) (submittedVersion, cc-by-nc-nd)
  • NORA - Norwegian Open Research Archives (submittedVersion, cc-by-nc-nd)
Funders
  • South-Eastern Norway Regional Health Authority (2014041)
  • JSPS KAKENHI (16K07468)
  • Natural Environment Research Council (NE/P013678/1)
  • ERC (ERC-2012-Co-616960)
  • Secretary’s Office for Universities and Research of the Generalitat de Catalunya (2014 SGR 619)
  • Spanish Ministry for Economy and Competitiveness (BFU2017-90114-P)
  • European Regional Development Fund (Nr. 213703, 240284)
  • Norwegian Research Council
  • Molecular Life Science board at University of Oslo
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › MicroRNA in disease regulation
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Marine Invertebrate Physiology and Ecology
Keywords
microRNA biogenesis, microprocessor complex, Drosha, pashas, DGCR8, Ichthyosporea, origin of multicellularity, small RNA, miRNA genes
MeSH terms
Animals, Base Sequence, Phylogeny, Evolution, Molecular, MicroRNAs, Mesomycetozoea

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