Molecular mechanisms of Staphylococcus aureus iron acquisition.

Molecular mechanisms of Staphylococcus aureus iron acquisition.
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DOI:
10.1146/annurev-micro-090110-102851
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发表时间:
2011
影响因子:
10.5
通讯作者:
Skaar EP
Skaar EP
中科院分区:
生物学1区
文献类型:
--
作者:
Hammer ND;Skaar EP

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铁独特的氧化还原电位非常适合在多种生化反应中用作辅助因子。因此,铁对于几乎所有生物体(包括病原菌)的生长和增殖都至关重要。脊椎动物将多余的铁隔离在蛋白质中,以减轻毒性并限制可用于入侵病原体的游离铁的量。通过隔离必需营养素来限制传染性微生物的生长被称为营养免疫。为了规避营养免疫,细菌病原体进化出了优雅的系统,允许在感染过程中获取铁。革兰氏阳性细胞外病原体金黄色葡萄球菌是一种共生生物,当它进入底层组织时可引起严重疾病。金黄色葡萄球菌定植和随后的发病机制需要铁的获取。在此,我们回顾了金黄色葡萄球菌通过产生铁载体和消耗宿主血红素来获取铁的策略。
The unique redox potential of iron is ideal for use as a cofactor in diverse biochemical reactions. Iron is therefore vital for the growth and proliferation of nearly all organisms, including pathogenic bacteria. Vertebrates sequester excess iron within proteins in order to alleviate toxicity and restrict the amount of free iron available for invading pathogens. Restricting the growth of infectious microorganisms by sequestering essential nutrients is referred to as nutritional immunity. In order to circumvent nutritional immunity bacterial pathogens have evolved elegant systems that allow for the acquisition of iron during infection. The Gram-positive extracellular pathogen Staphylococcus aureus is a commensal organism that can cause severe disease when it gains access to underlying tissues. Iron acquisition is required for S. aureus colonization and subsequent pathogenesis. Herein we review the strategies S. aureus employs to obtain iron through the production of siderophores and the consumption of host heme.
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