Iron sensing and regulation in Saccharomyces cerevisiae: Ironing out the mechanistic details.

Iron sensing and regulation in Saccharomyces cerevisiae: Ironing out the mechanistic details.
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DOI:
10.1016/j.mib.2013.07.020
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发表时间:
2013-12
影响因子:
5.4
通讯作者:
Albetel AN
Albetel AN
中科院分区:
生物学2区
文献类型:
--
作者:
Outten CE;Albetel AN

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酿酒酵母中铁代谢的调节是通过低铁敏感转录因子(Aft1 和 Aft2)和高铁敏感转录因子(Yap5)在转录水平上实现的,并在转录后水平上通过 mRNA 结合蛋白(Cth1 和 Cth2)实现的。在这篇综述中,我们重点介绍了最近的研究,这些研究揭示了铁硫簇在控制 Aft1/2 和 Yap5 活性中发挥的关键作用,以及铁稳态和硫醇氧化还原代谢之间的复杂关系。此外,对 Cth1/Cth2 定位和调节的新见解为细胞适应缺铁增加了另一层复杂性。最后,对亚细胞铁形态变化响应环境和遗传因素的生物物理学研究进一步阐明了管理细胞中铁生物利用度所需的复杂控制机制。
Regulation of iron metabolism in Saccharomyces cerevisiae is achieved at the transcriptional level by low (Aft1 and Aft2) and high iron-sensing (Yap5) transcription factors, and at the post-transcriptional level by mRNA-binding proteins (Cth1 and Cth2). In this review we highlight recent studies unveiling the critical role that iron-sulfur clusters play in control of Aft1/2 and Yap5 activity, as well as the complex relationship between iron homeostasis and thiol redox metabolism. In addition, new insights into the localization and regulation of Cth1/Cth2 have added another layer of complexity to the cell’s adaptation to iron deficiency. Finally, biophysical studies on subcellular iron speciation changes in response to environmental and genetic factors have further illuminated the elaborate control mechanisms required to manage iron bioavailability in the cell.
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