Sibling rivalry: related bacterial small RNAs and their redundant and non-redundant roles.

Sibling rivalry: related bacterial small RNAs and their redundant and non-redundant roles.
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DOI:
10.3389/fcimb.2014.00151
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发表时间:
2014
影响因子:
5.7
通讯作者:
Murphy ER
Murphy ER
中科院分区:
医学2区
文献类型:
--
作者:
Caswell CC;Oglesby-Sherrouse AG;Murphy ER

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小RNA分子(sRNA)现在被认为是控制细菌基因表达的关键调节因子,因为sRNA提供了一种快速有效的方式来积极或消极地改变特定基因的表达。迄今为止,已经在无数细菌物种中鉴定和表征了许多sRNA,但最近,细菌sRNA中出现了一个主题:由给定细菌产生的一种以上高度相关的sRNA的存在,这里称为同胞sRNA。兄弟sRNA是那些在核苷酸水平上高度相似的sRNA,虽然基于它们的高度相关性,可以预期兄弟sRNA对靶基因的表达发挥相同的调节功能,但新出现的证据表明情况并非总是如此。事实上,有几个例子的细菌同胞sRNA与非冗余的调节功能,但也有明显的调节冗余同胞sRNA之间的情况。这篇综述提供了一个全面的概述,目前的知识细菌的兄弟sRNAs,并讨论了重要的问题,这类新兴的监管机构的意义和进化的影响。
Small RNA molecules (sRNAs) are now recognized as key regulators controlling bacterial gene expression, as sRNAs provide a quick and efficient means of positively or negatively altering the expression of specific genes. To date, numerous sRNAs have been identified and characterized in a myriad of bacterial species, but more recently, a theme in bacterial sRNAs has emerged: the presence of more than one highly related sRNAs produced by a given bacterium, here termed sibling sRNAs. Sibling sRNAs are those that are highly similar at the nucleotide level, and while it might be expected that sibling sRNAs exert identical regulatory functions on the expression of target genes based on their high degree of relatedness, emerging evidence is demonstrating that this is not always the case. Indeed, there are several examples of bacterial sibling sRNAs with non-redundant regulatory functions, but there are also instances of apparent regulatory redundancy between sibling sRNAs. This review provides a comprehensive overview of the current knowledge of bacterial sibling sRNAs, and also discusses important questions about the significance and evolutionary implications of this emerging class of regulators.
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