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Versatile microRNA biogenesis in animals and their viruses #MMPMID24823351
Xie M; Steitz JA
RNA Biol 2014[Jun]; 11 (6): 673-81 PMID24823351show ga
MicroRNAs (miRNAs) are ubiquitous gene regulators that modulate essential cellular processes at the post-transcriptional level. In metazoans and their viruses, most miRNAs are produced from hairpin-containing primary transcripts that are sequentially cleaved by nuclear Drosha and cytoplasmic Dicer. In the last decade, alternative mechanisms that bypass either the Drosha or Dicer cleavage step have emerged, increasing the complexity of the miRNA regulatory network. Here, we highlight non-canonical pathways that generate miRNAs using a variety of molecular machineries that play fundamental roles in the biogenesis and processing of other classes of cellular RNAs.