Cellular and molecular phenotypes depending upon the RNA repair system RtcAB of Escherichia coli.

Cellular and molecular phenotypes depending upon the RNA repair system RtcAB of Escherichia coli.
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DOI:
10.1093/nar/gkw628
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发表时间:
2016-11-16
影响因子:
14.9
通讯作者:
Buck M
Buck M
中科院分区:
生物学2区
文献类型:
--
作者:
Engl C;Schaefer J;Kotta-Loizou I;Buck M

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RNA连接酶在生命的三个王国中普遍发挥作用,用于RNA修复、剪接,并且可以被应激诱导。RtcB蛋白(还有HSPC117、C22orf28、FAAP和D10Wsu52e)是一种这样的保守连接酶,参与tRNA和mRNA剪接。然而,它的生理作用很少被描述,特别是在细菌中。我们现在在大肠杆菌中发现,RtcR激活的rtcAB基因的功能涉及rRNA稳定性的核糖体稳态。rtcAB的表达被损害翻译装置或可能导致细胞氧化损伤的试剂和遗传损伤激活。Rtc帮助细胞在翻译装置的挑战中生存下来,包括核糖体靶向抗生素。此外,Rtc的丧失导致趋化性和运动性的深刻变化。总之,我们的数据表明,RTC系统是以前未被认识到的适应性反应的一部分,连接核糖体稳态与基本细胞生理和行为。
RNA ligases function pervasively across the three kingdoms of life for RNA repair, splicing and can be stress induced. The RtcB protein (also HSPC117, C22orf28, FAAP and D10Wsu52e) is one such conserved ligase, involved in tRNA and mRNA splicing. However, its physiological role is poorly described, especially in bacteria. We now show in Escherichia coli bacteria that the RtcR activated rtcAB genes function for ribosome homeostasis involving rRNA stability. Expression of rtcAB is activated by agents and genetic lesions which impair the translation apparatus or may cause oxidative damage in the cell. Rtc helps the cell to survive challenges to the translation apparatus, including ribosome targeting antibiotics. Further, loss of Rtc causes profound changes in chemotaxis and motility. Together, our data suggest that the Rtc system is part of a previously unrecognized adaptive response linking ribosome homeostasis with basic cell physiology and behaviour.
野生型和激活因子旁路形式的基因组宽相互作用的σ54。
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