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Evolution and Functional Diversification of MIRNA Genes

Open access
Cuperus, Josh T., Fahlgren, Noah, Carrington, James C.·2011·The Plant Cell

Abstract

MicroRNAs (miRNAs) are small regulatory RNAs found in diverse eukaryotic lineages. In plants, a minority of annotated MIRNA gene families are conserved between plant families, while the majority are family- or species-specific, suggesting that most known MIRNA genes arose relatively recently in evolutionary time. Given the high proportion of young MIRNA genes in plant species, new MIRNA families are likely spawned and then lost frequently. Unlike highly conserved, ancient miRNAs, young miRNAs are often weakly expressed, processed imprecisely, lack targets, and display patterns of neutral variation, suggesting that young MIRNA loci tend to evolve neutrally. Genome-wide analyses from several plant species have revealed that variation in miRNA foldback expression, structure, processing efficiency, and miRNA size have resulted in the unique functionality of MIRNA loci and resulting miRNAs. Additionally, some miRNAs have evolved specific properties and functions that regulate other transcriptional or posttranscriptional silencing pathways. The evolution of miRNA processing and functional diversity underscores the dynamic nature of miRNA-based regulation in complex regulatory networks.

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Metadata

Authors
Cuperus, J. T., Fahlgren, N., & Carrington, J. C.
Venue
The Plant Cell
Published
2011-02
Volume
23
Issue
2
Pages
431-442
ISSN
  • 1040-4651 (ISSN-L)
  • 1532-298X
OpenAlex
W2159444732
Cited by
727
References
4
FWCI
69.02
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Evolution and Functional Diversification of MIRNA Genes. https://app.cochat.ai/papers/10.1105/tpc.110.082784
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Cuperus, J. T., Fahlgren, N., & Carrington, J. C. (2011). Evolution and Functional Diversification of MIRNA Genes. The Plant Cell. https://doi.org/10.1105/tpc.110.082784

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