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
Lai EC
中科院分区:
生物学1区
文献类型:
--
作者:
Yang JS;Lai EC

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自从建立了由RNase III酶Drosha和Dicer驱动的典型动物microRNA生物合成途径以来,出现了一种意想不到的产生功能性microRNA的替代机制。我们在这里回顾了许多Drosha独立和Dicer独立的microRNA生物发生策略,其特征在于在过去几年。除了反映小RNA机器的灵活性外,非经典途径的存在对解释核心microRNA机器中的突变体具有影响。这种突变体通常用于评估“总”microRNA丢失的后果,事实上,它们表现出许多总体表型相似性。然而,正在进行的研究揭示了越来越多的设置,其中替代microRNA途径有助于核心microRNA生物发生突变体之间的不同表型。
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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