An ancient pan-cnidarian microRNA regulates stinging capsule biogenesis in Nematostella vectensis

Fridrich, Arie; Salinas-Saaverda, Miguel; Kozlolvski, Itamar; Surm, Joachim M.; Chrysostomou, Eleni; Tripathi, Abhinandan M.; Frank, Uri; Moran, Yehu

doi:10.1016/j.celrep.2023.113072

Cell Reports

2023

DOI: 10.1016/j.celrep.2023.113072

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An ancient pan-cnidarian microRNA regulates stinging capsule biogenesis in Nematostella vectensis

Arie Fridrich,

Miguel Salinas-Saaverda,

Itamar Kozlolvski

et al.

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2023

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Target complementarity in cnidarians supports a common origin for animal and plant microRNAs

Admoni

Fridrich

Moran

2023

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microRNAs (miRNAs) are important post-transcriptional regulators that activate silencing mechanisms by annealing to mRNA transcripts. While plant miRNAs match their targets with nearly-full complementarity leading to mRNA cleavage, miRNAs in most animals require only a short sequence called seed to inhibit target translation. Recent findings showed that miRNAs in cnidarians, early branching metazoans, act similarly to plant miRNAs, by exhibiting full complementarity and target cleavage; however, it remained unknown if seed-based regulation was possible in cnidarians. Here, we investigate the miRNA-target complementarity requirements for miRNA activity in the cnidarian Nematostella vectensis. We show that bilaterian-like complementarity of seed match or seed and supplementary 3' matches are insufficient for miRNA-mediated knockdown. Furthermore, mismatches in the cleavage site, positions 10-11 of the miRNA, decrease knockdown efficiency. Finally, we assayed miRNA silencing of a target with three seed binding sites in the 3' untranslated region to mimic typical miRNA targeting and observed no repression. Altogether, these results unravel striking similarities between plant and cnidarian miRNAs consolidating the evidence for common evolutionary origin of miRNAs in plants and animals.

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Target complementarity in cnidarians supports a common origin for animal and plant microRNAs

Admoni

Fridrich

Moran

2023

Preprint

View full text Add to dashboard Cite

show abstract

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An ancient pan-cnidarian microRNA regulates stinging capsule biogenesis in Nematostella vectensis

Cited by 1 publication

References 83 publications

Target complementarity in cnidarians supports a common origin for animal and plant microRNAs

Target complementarity in cnidarians supports a common origin for animal and plant microRNAs

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