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Prokaryotic and eukaryotic monothiol glutaredoxins are able to perform the functions of Grx5 in the biogenesis of Fe/S clusters in yeast mitochondria
Molina Navarro, Maria Micaela; Casas Herranz, Celia; Piedrafita, Lidia; Bellí i Martínez, Gemma; Herrero Perpiñán, Enrique
The Saccharomyces cerevisiae monothiol glutare- doxin Grx5 participates in the mitochondrial biogenesis of iron–sulfur clusters. Grx5 homologues exist in organisms from bacteria to humans. Chicken (cGRX5) and human (hGRX5) homologues contain a mitochondrial targeting sequence, suggest- ing a mitochondrial localization for these two proteins. We have compartmentalized the Escherichia coli and Synechocystis sp. homologues, and also cGRX5 and hGRX5, in the mitochondrial matrix of a yeast grx5 mutant. All four heterologous proteins rescue the defects of the mutant. The chicken cGRX5 gene was significantly expressed throughout the embryo stages in different tissues. These results underline the functional conservation of Grx5 homologues throughout evolution.
Iron–sulfur cluster
Redox regulation
(c) Federation of European Biochemical Societies, 2006
(c) Elsevier, 2006

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