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Curr Opin Microbiol. 2013 Dec;16(6):662-8. doi: 10.1016/j.mib.2013.07.020. Epub 2013 Aug 17.

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

Author information

1
Department of Chemistry and Biochemistry, University of South Carolina, 631 Sumter St., Columbia, SC 29208, USA. Electronic address: outten@mailbox.sc.edu.

Abstract

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.

PMID:
23962819
PMCID:
PMC3842356
DOI:
10.1016/j.mib.2013.07.020
[Indexed for MEDLINE]
Free PMC Article

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