铁质
操纵子
细菌
生物
毒力
氧气输送
铁
生物化学
微生物代谢
微生物学
化学
大肠杆菌
氧气
遗传学
无机化学
基因
有机化学
作者
Cecilia Lau,Karla D. Krewulak,Hans J. Vogel
出处
期刊:Fems Microbiology Reviews
[Oxford University Press]
日期:2015-12-17
卷期号:40 (2): 273-298
被引量:297
标识
DOI:10.1093/femsre/fuv049
摘要
To maintain iron homeostasis within the cell, bacteria have evolved various types of iron acquisition systems. Ferric iron (Fe3+) is the dominant species in an oxygenated environment, while ferrous iron (Fe2+) is more abundant under anaerobic conditions or at low pH. For organisms that must combat oxygen limitation for their everyday survival, pathways for the uptake of ferrous iron are essential. Several bacterial ferrous iron transport systems have been described; however, only the Feo system appears to be widely distributed and is exclusively dedicated to the transport of iron. In recent years, many studies have explored the role of the FeoB and FeoA proteins in ferrous iron transport and their contribution toward bacterial virulence. The three-dimensional structures for the Feo proteins have recently been determined and provide insight into the molecular details of the transport system. A highly select group of bacteria also express the FeoC protein from the same operon. This review will provide a comprehensive look at the structural and functional aspects of the Feo system. In addition, bioinformatics analyses of the feo operon and the Feo proteins have been performed to complement our understanding of this ubiquitous bacterial uptake system, providing a new outlook for future studies.
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