Bacterial Mg2+ homeostasis, transport, and virulence.

Bacterial Mg2+ homeostasis, transport, and virulence.
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DOI:
10.1146/annurev-genet-051313-051025
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发表时间:
2013
影响因子:
11.1
通讯作者:
Pontes MH
Pontes MH
中科院分区:
生物学1区
文献类型:
--
作者:
Groisman EA;Hollands K;Kriner MA;Lee EJ;Park SY;Pontes MH

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生物体必须维持生理水平的Mg2+,因为这种二价阳离子对于膜和核糖体的稳定、核酸的中和以及各种酶促反应中的辅助因子至关重要。在这篇综述中,我们描述了细菌利用感知细胞质内外Mg2+水平的机制。我们研究了细菌如何通过调节Mg2+转运体的表达和活性以及改变其细胞包膜的组成来实现Mg2+稳态。我们讨论了存在于Mg2+感应,Mg2+运输和细菌毒力之间的联系。此外,我们还探索了细菌基因组编码多种Mg2+转运蛋白以及胞浆和胞外Mg2+不同传感系统背后的逻辑。这些分析可能适用于其他阳离子的稳态控制。
Organisms must maintain physiological levels of Mg2+ because this divalent cation is critical for the stabilization of membranes and ribosomes, the neutralization of nucleic acids, and as a cofactor in a variety of enzymatic reactions. In this review, we describe the mechanisms that bacteria utilize to sense the levels of Mg2+ both outside and inside the cytoplasm. We examine how bacteria achieve Mg2+ homeostasis by adjusting the expression and activity of Mg2+ transporters, and by changing the composition of their cell envelope. We discuss the connections that exist between Mg2+ sensing, Mg2+ transport and bacterial virulence. Additionally, we explore the logic behind the fact that bacterial genomes encode multiple Mg2+ transporters and distinct sensing systems for cytoplasmic and extracytoplasmic Mg2+. These analyses may be applicable to the homeostatic control of other cations.
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