The Stringent Response-Regulated sRNA Transcriptome of Borrelia burgdorferi.

The Stringent Response-Regulated sRNA Transcriptome of Borrelia burgdorferi.
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DOI:
10.3389/fcimb.2018.00231
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发表时间:
2018
影响因子:
5.7
通讯作者:
Samuels DS
Samuels DS
中科院分区:
医学2区
文献类型:
--
作者:
Drecktrah D;Hall LS;Rescheneder P;Lybecker M;Samuels DS

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莱姆病螺旋体伯氏疏螺旋体必须耐受营养胁迫才能在其地方性生活周期的蜱虫阶段持续存在。我们以前发现,由RelBbu介导的严格反应在全球范围内调节基因表达,以促进在蜱载体中的持久性。在这里,我们发现RelBbu调节一系列小RNA(sRNA)的表达,影响了B中36%的先前鉴定的sRNA。burgdorferi。这是在任何螺旋体中发现的第一个sRNA调节机制。在营养胁迫期间,RelBbu上调的sRNA是下调的3倍,包括反义、基因间和5′非翻译区sRNA。RelBbu-regulated sRNAs与已知对宿主感染(bosR和dhhp)以及在蜱虫中的持久性(glpF和hk 1)重要的基因相关,这表明了基因表达的转录后调控的潜在机制。
The Lyme disease spirochete Borrelia (Borreliella) burgdorferi must tolerate nutrient stress to persist in the tick phase of its enzootic life cycle. We previously found that the stringent response mediated by RelBbu globally regulates gene expression to facilitate persistence in the tick vector. Here, we show that RelBbu regulates the expression of a swath of small RNAs (sRNA), affecting 36% of previously identified sRNAs in B. burgdorferi. This is the first sRNA regulatory mechanism identified in any spirochete. Threefold more sRNAs were RelBbu-upregulated than downregulated during nutrient stress and included antisense, intergenic and 5′ untranslated region sRNAs. RelBbu-regulated sRNAs associated with genes known to be important for host infection (bosR and dhhp) as well as persistence in the tick (glpF and hk1) were identified, suggesting potential mechanisms for post-transcriptional regulation of gene expression.
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