Alternative miRNA biogenesis pathways and the interpretation of core miRNA pathway mutants.
Alternative miRNA biogenesis pathways and the interpretation of core miRNA pathway mutants.
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DOI:
10.1016/j.molcel.2011.07.024
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发表时间:
2011-09-16
期刊:
影响因子:
16
通讯作者:
Lai EC
中科院分区:
文献类型:
--
作者:
Yang JS;Lai EC
Since the establishment of a canonical animal microRNA biogenesis pathway driven by the RNase III enzymes Drosha and Dicer, an unexpected variety of alternative mechanisms that generate functional microRNAs have emerged. We review here the many Drosha-independent and Dicer-independent microRNA biogenesis strategies characterized over the past few years. Beyond reflecting the flexibility of small RNA machineries, the existence of non-canonical pathways has consequences for interpreting mutants in the core microRNA machinery. Such mutants are commonly used to assess the consequences of “total” microRNA loss, and indeed, they exhibit many overall phenotypic similarities. Nevertheless, ongoing studies reveal a growing number of settings in which alternative microRNA pathways contribute to distinct phenotypes amongst core microRNA biogenesis mutants.
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