Monothiol CGFS glutaredoxins and BolA-like proteins: [2Fe-2S] binding partners in iron homeostasis.

Monothiol CGFS glutaredoxins and BolA-like proteins: [2Fe-2S] binding partners in iron homeostasis.
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DOI:
10.1021/bi300393z
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发表时间:
2012-06-05
期刊:
影响因子:
2.9
通讯作者:
Outten CE
Outten CE
中科院分区:
生物学3区
文献类型:
--
作者:
Li H;Outten CE

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具有标志性 CGFS 活性位点的单硫醇谷氧还蛋白 (Grxs) 和 BolA 样蛋白最近已成为铁稳态中的新参与者。优雅的遗传和生化研究检查了酿酒酵母和粟酒裂殖酵母中 CGFS Grxs 的功能和物理相互作用,揭示了它们在细胞内铁信号传导、铁运输和 Fe-S 簇蛋白成熟中的重要作用。对酿酒酵母中 CGFS Grxs 和 BolA 样蛋白之间的 [2Fe-2S] 桥联相互作用进行生物物理和生化分析,首次在分子水平上理解了该模型真核生物中的铁调节机制,并建立了普遍存在的 CGFS Grxs 和 BolA 样蛋白作为新型 Fe-S 簇结合调节伙伴。针对大肠杆菌和人类 CGFS Grxs 和 BolA 样蛋白同源物的平行研究支持了酵母研究,并为它们参与细胞铁代谢提供了更多线索。在此,我们回顾了揭示 CGFS Grxs 和 BolA 样蛋白帮助调节真核和原核生物铁代谢的细胞和分子机制的最新进展。
Monothiol glutaredoxins (Grxs) with a signature CGFS active site and BolA-like proteins have recently emerged as novel players in iron homeostasis. Elegant genetic and biochemical studies examining the functional and physical interactions of CGFS Grxs in the fungi Saccharomyces cerevisiae and Schizosaccharomyces pombe have unveiled their essential roles in intracellular iron signaling, iron trafficking, and the maturation of Fe-S cluster proteins. Biophysical and biochemical analyses of the [2Fe-2S]-bridging interaction between CGFS Grxs and a BolA-like protein in S. cerevisiae provided the first molecular-level understanding of the iron regulation mechanism in this model eukaryote, and established the ubiquitous CGFS Grxs and BolA-like proteins as novel Fe-S cluster-binding regulatory partners. Parallel studies focused on E. coli and human homologues for CGFS Grxs and BolA-like proteins have supported the studies in yeast and provided additional clues to their involvement in cellular iron metabolism. Herein we review recent progress in uncovering the cellular and molecular mechanisms by which CGFS Grxs and BolA-like proteins help regulate iron metabolism in both eukaryotic and prokaryotic organisms.
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