Regulation of chaperone/effector complex synthesis in a bacterial type III secretion system.
Regulation of chaperone/effector complex synthesis in a bacterial type III secretion system.
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DOI:
10.1111/j.1365-2958.2011.07784.x
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发表时间:
2011-09
影响因子:
3.6
通讯作者:
Galán JE
中科院分区:
文献类型:
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作者:
Button JE;Galán JE
Type III protein secretion systems (T3SS), which have evolved to deliver bacterial proteins into nucleated cells, are found in many species of Gram-negative bacteria that live in close association with eukaryotic hosts. Proteins destined to travel this secretion pathway are targeted to the secretion machine by customized chaperones, with which they form highly ordered complexes. Here, we have identified a mechanism that coordinates the expression of the Salmonella Typhimurium T3SS chaperone SicP and its cognate effector SptP. Translation of the effector is coupled to that of its chaperone, and in the absence of translational coupling, an inhibitory RNA structure prevents translation of sptP. Furthermore, we have found that translational coupling is essential for secretion-competent SicP/SptP complex assembly. The data presented here show how the genomic organization of functionally related proteins can have a significant impact on protein function.
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