Iron metabolism in the yeast
Current data concerning transport, storage and utilization of iron in the yeast cells, particularly Saccharomyces cerevisiae are summarized in the paper. It has been marked that iron uptake in the cells provides by high affinity system, it function is carried out by protein complex Fet3-Ftr1, and Fet4, protein with low affinity to iron ion. The both systems utilize Fe(II). Furthermore, the active site of the protein Fre1 is exposed on the outer side of plasmalemma. This protein, due to ferrireductase activity, provides availability of Fe(III) to the cell. The information regards to participation of siderophores and metal-proton plasma membrane exchangers Smf1 in iron transport is brought. Particular attention is given to regulation of expression of the genes, coding the iron metabolic systems. Some aspects of iron utilization for Fe-S-containing enzymes synthesis are lighted. It has been concluded that the yeast is a perspective subject for studying balance of living organisms between iron essentiality and its ability to trigger free radical reactions.
Published at the site: 2005-05-05
The original article in Ukrainian is available for download in PDF format.
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