Dissemin is shutting down on January 1st, 2025

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Wiley, FEBS Letters, 5(589), p. 621-628, 2015

DOI: 10.1016/j.febslet.2015.01.027

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The mitochondrial dicarboxylate and 2-oxoglutarate carriers do not transport glutathione

This paper is available in a repository.
This paper is available in a repository.

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Abstract

Glutathione carries out vital protective roles within mitochondria, but is synthesised in the cytosol. Previous studies have suggested that the mitochondrial dicarboxylate and 2-oxoglutarate carriers were responsible for glutathione uptake. We set out to characterise the putative glutathione transport by using fused membrane vesicles of Lactococcus lactis overexpressing the dicarboxylate and 2-oxoglutarate carriers. Although transport of the canonical substrates could be measured readily, an excess of glutathione did not compete for substrate uptake nor could transport of glutathione be measured directly. Thus these mitochondrial carriers do not transport glutathione and the identity of the mitochondrial glutathione transporter remains unknown.