New aspects of RNA-based regulation by Hfq and its partner sRNAs.

New aspects of RNA-based regulation by Hfq and its partner sRNAs.
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DOI:
10.1016/j.mib.2017.10.014
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发表时间:
2018-04
影响因子:
5.4
通讯作者:
Gottesman, Susan
Gottesman, Susan
中科院分区:
生物学2区
文献类型:
--
作者:
Kavita, Kumari;de Mets, Francois;Gottesman, Susan

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Hfq是一种RNA分子伴侣,促进小RNA(sRNA)与靶mRNA的配对,介导mRNA稳定性和翻译的转录后调节。这种调节有助于细菌在应激和发病过程中的适应。测序技术的最新进展表明,sRNA不仅存在于基因间区域,而且还存在于mRNA的3'和5' UTR,从而扩展了sRNA调控网络。Hfq及其相关RNA的额外调节层仍在继续被发现。新发现的RNA海绵调节一些sRNA的活性。sRNA的一个子集被证明是双功能的,能够与靶标配对,也编码小的ORF或结合其他RNA结合蛋白,如CsrA。此外,在缺少sRNA的情况下,Hfq抑制mRNA翻译的例子越来越多。
Hfq, an RNA chaperone, promotes the pairing of small RNAs (sRNAs) to target mRNAs, mediating post-transcriptional regulation of mRNA stability and translation. This regulation contributes to bacterial adaptation during stress and pathogenesis. Recent advances in sequencing techniques demonstrate the presence of sRNAs encoded not only in intergenic regions but also from the 3’ and 5’ UTRs of mRNAs, expanding sRNA regulatory networks. Additional layers of regulation by Hfq and its associated RNAs continue to be found. Newly identified RNA sponges modulate the activity of some sRNAs. A subset of sRNAs are proving to be bifunctional, able to pair with targets and also encoding small ORFs or binding other RNA binding proteins, such as CsrA. In addition, there are accumulating examples of Hfq inhibiting mRNA translation in the absence of sRNAs.
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