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Mitochondrial iron trafficking and the integration of iron metabolism between the mitochondrion and cytosol Richardson DR; Lane DJ; Becker EM; Huang ML; Whitnall M; Suryo Rahmanto Y; Sheftel AD; Ponka PProc Natl Acad Sci U S A 2010[Jun]; 107 (24): 10775-82The mitochondrion is well known for its key role in energy transduction. However, it is less well appreciated that it is also a focal point of iron metabolism. Iron is needed not only for heme and iron sulfur cluster (ISC)-containing proteins involved in electron transport and oxidative phosphorylation, but also for a wide variety of cytoplasmic and nuclear functions, including DNA synthesis. The mitochondrial pathways involved in the generation of both heme and ISCs have been characterized to some extent. However, little is known concerning the regulation of iron uptake by the mitochondrion and how this is coordinated with iron metabolism in the cytosol and other organelles (e.g., lysosomes). In this article, we discuss the burgeoning field of mitochondrial iron metabolism and trafficking that has recently been stimulated by the discovery of proteins involved in mitochondrial iron storage (mitochondrial ferritin) and transport (mitoferrin-1 and -2). In addition, recent work examining mitochondrial diseases (e.g., Friedreich's ataxia) has established that communication exists between iron metabolism in the mitochondrion and the cytosol. This finding has revealed the ability of the mitochondrion to modulate whole-cell iron-processing to satisfy its own requirements for the crucial processes of heme and ISC synthesis. Knowledge of mitochondrial iron-processing pathways and the interaction between organelles and the cytosol could revolutionize the investigation of iron metabolism.|Anemia, Sideroblastic/genetics/metabolism[MESH]|Animals[MESH]|Biological Transport, Active[MESH]|Cytosol/metabolism[MESH]|Frataxin[MESH]|Friedreich Ataxia/genetics/metabolism[MESH]|Heme/biosynthesis[MESH]|Homeostasis[MESH]|Humans[MESH]|Iron-Binding Proteins/genetics/metabolism[MESH]|Iron-Sulfur Proteins/biosynthesis[MESH]|Iron/*metabolism[MESH]|Mitochondria/*metabolism[MESH]|Models, Biological[MESH]|Receptors, Transferrin/metabolism[MESH]|Transferrin/metabolism[MESH] |
