An intronic microRNA silences genes that are functionally antagonistic to its host gene.

An intronic microRNA silences genes that are functionally antagonistic to its host gene.
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与其宿主基因功能拮抗的内含子microRNA沉默基因。

DOI:
10.1093/nar/gkn513
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发表时间:
2008-09
影响因子:
14.9
通讯作者:
Barik, Sailen
Barik, Sailen
中科院分区:
生物学2区
文献类型:
--
作者:
Barik, Sailen

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microRNA(miRNAs)是一类短的非编码RNA,通过沉默特定的靶mRNA来下调基因表达。虽然许多miRNAs是从它们自己的基因转录的,但近一半的miRNAs位于“宿主”基因的内含子内,其意义尚不清楚。我们报告说,转录激活的阿尔茨海默病相关酪氨酸激酶(AATK),神经元分化所必需的,也产生miR-338从AATK基因内含子沉默的mRNA家族,其蛋白质产物是神经元分化的负调控。我们的结论是,与宿主基因mRNA一起转录的内含子miRNA可能通过沉默一组与宿主基因本身功能性拮抗的基因来服务于其宿主基因的利益。
MicroRNAs (miRNAs) are short noncoding RNAs that down-regulate gene expression by silencing specific target mRNAs. While many miRNAs are transcribed from their own genes, nearly half map within introns of ‘host’ genes, the significance of which remains unclear. We report that transcriptional activation of apoptosis-associated tyrosine kinase (AATK), essential for neuronal differentiation, also generates miR-338 from an AATK gene intron that silences a family of mRNAs whose protein products are negative regulators of neuronal differentiation. We conclude that an intronic miRNA, transcribed together with the host gene mRNA, may serve the interest of its host gene by silencing a cohort of genes that are functionally antagonistic to the host gene itself.
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