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首页> 外文期刊>Critical Reviews in Biochemistry and Molecular Biology >From ribosome to riboswitch: control of gene expression in bacteria by RNA structural rearrangements.
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From ribosome to riboswitch: control of gene expression in bacteria by RNA structural rearrangements.

机译:从核糖体到核糖开关:通过RNA结构重排控制细菌中的基因表达。

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摘要

Structural elements in the 5' region of a bacterial mRNA can have major effects on expression of downstream coding sequences. Folding of the nascent RNA into the helix of an intrinsic transcriptional terminator results in premature termination of transcription and in failure to synthesize the full-length transcript. Structure in the translation initiation region of an mRNA blocks access of the translation initiation complex to the ribosome binding site, thereby preventing protein synthesis. RNA structures can also affect the stability of an RNA by altering sensitivity to ribonucleases. A wide variety of mechanisms have been uncovered in which changes in mRNA structure in response to a regulatory signal are used to modulate gene expression in bacteria. These systems allow the cell to recognize an impressive array of signals, and to monitor those signals in many different ways.
机译:细菌mRNA的5'区域中的结构元件可能对下游编码序列的表达产生重大影响。将新生RNA折叠到内在的转录终止子的螺旋中会导致转录的过早终止,并且无法合成全长转录本。 mRNA的翻译起始区中的结构会阻止翻译起始复合物进入核糖体结合位点,从而阻止蛋白质合成。 RNA结构还可通过改变对核糖核酸酶的敏感性来影响RNA的稳定性。已经发现了多种机制,其中响应于调节信号的mRNA结构的改变被用来调节细菌中的基因表达。这些系统使细胞能够识别令人印象深刻的信号阵列,并以许多不同的方式监视这些信号。

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