(p)ppGpp: Still Magical?

被引:892
作者
Potrykus, Katarzyna [1 ]
Cashel, Michael [1 ]
机构
[1] NICHHD, NIH, Mol Genet Lab, Bethesda, MD 20892 USA
关键词
stringent response; transcription; stress; pathogenesis; Rel/Spo; homologs;
D O I
10.1146/annurev.micro.62.081307.162903
中图分类号
Q93 [微生物学];
学科分类号
071005 ; 100705 ;
摘要
The fundamental details of how nutritional stress leads to elevating (p)ppGpp are questionable. By common usage, the meaning of the stringent response has evolved from the specific response to (p)ppGpp provoked by amino acid starvation to all responses caused by elevating (p)ppGpp by any means. Different responses have similar as well as dissimilar positive and negative effects on gene expression and metabolism. The different ways that different bacteria seem to exploit their capacities to form and respond to (p)ppGpp are already impressive despite an early stage of discovery. Apparently, (p)ppGpp can contribute to regulation of many aspects of microbial cell biology that are sensitive to changing nutrient availability: growth, adaptation, secondary metabolism, survival, persistence, cell division, motility, biofilms, development, competence, and virulence. Many basic questions still exist. This review tries to focus on some issues that linger even for the most widely characterized bacterial strains.
引用
收藏
页码:35 / 51
页数:17
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