A riboswitch-based inducible gene expression system for mycobacteria.

A riboswitch-based inducible gene expression system for mycobacteria.
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DOI:
10.1371/journal.pone.0029266
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发表时间:
2012
期刊:
影响因子:
3.7
通讯作者:
Bertozzi CR
Bertozzi CR
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Seeliger JC;Topp S;Sogi KM;Previti ML;Gallivan JP;Bertozzi CR

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人类结核分枝杆菌(Mtb)的研究将受益于调控基因表达的新工具。在这里,我们描述了一个合成的基于核糖开关的系统的特性和应用,该系统包括一个用于转录控制的分枝杆菌启动子和一个用于翻译控制的核糖开关。在巨噬细胞感染模型中,利用该系统诱导和抑制外源蛋白的可逆过表达,建立条件基因敲低,并控制基因表达。与现有的控制结核分枝杆菌基因表达的系统不同,核糖体开关不需要任何辅助蛋白的共同表达:所有的调节机制都是由靶基因上游的短DNA片段编码的。诱导型核糖开关平台有潜力成为一种强大的通用策略,用于在结核分枝杆菌中创建定制的基因调控系统。
Research on the human pathogen Mycobacterium tuberculosis (Mtb) would benefit from novel tools for regulated gene expression. Here we describe the characterization and application of a synthetic riboswitch-based system, which comprises a mycobacterial promoter for transcriptional control and a riboswitch for translational control. The system was used to induce and repress heterologous protein overexpression reversibly, to create a conditional gene knockdown, and to control gene expression in a macrophage infection model. Unlike existing systems for controlling gene expression in Mtb, the riboswitch does not require the co-expression of any accessory proteins: all of the regulatory machinery is encoded by a short DNA segment directly upstream of the target gene. The inducible riboswitch platform has the potential to be a powerful general strategy for creating customized gene regulation systems in Mtb.
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