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- W1556835664 abstract "Several terminal uridyltransferases (TUTases) are known to modulate small RNA biogenesis and/or function via diverse mechanisms. Here, we demonstrate that Drosophila splicing-derived pre-miRNAs (mirtrons) are efficiently modified by the previously uncharacterized TUTase, Tailor. Tailor is necessary and sufficient for mirtron hairpin uridylation, and this modification inhibits mirtron biogenesis. Genome-wide analyses demonstrate that mirtrons are dominant Tailor substrates, and three features contribute to substrate specificity. First, reprogramming experiments show Tailor preferentially identifies splicing-derived miRNAs. Second, in vitro tests indicate Tailor prefers substrate hairpins over mature miRNAs. Third, Tailor exhibits sequence preference for 3'-terminal AG, a defining mirtron characteristic. Our work supports the notion that Tailor preferentially suppresses biogenesis of mirtrons, an evolutionarily adventitious pre-miRNA substrate class. Moreover, we detect preferential activity of Tailor on 3'-G canonical pre-miRNAs, and specific depletion of such loci from the pool of conserved miRNAs. Thus, Tailor activity may have had collateral impact on shaping populations of canonical miRNAs." @default.
- W1556835664 created "2016-06-24" @default.
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- W1556835664 date "2015-07-01" @default.
- W1556835664 modified "2023-10-12" @default.
- W1556835664 title "Selective Suppression of the Splicing-Mediated MicroRNA Pathway by the Terminal Uridyltransferase Tailor" @default.
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- W1556835664 doi "https://doi.org/10.1016/j.molcel.2015.05.034" @default.
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