TY - JOUR
T1 - Autoregulatory control of mitochondrial glutathione homeostasis
AU - Liu, Yuyang
AU - Liu, Shanshan
AU - Tomar, Anju
AU - Yen, Frederick S.
AU - Unlu, Gokhan
AU - Ropek, Nathalie
AU - Weber, Ross A.
AU - Wang, Ying
AU - Khan, Artem
AU - Gad, Mark
AU - Peng, Junhui
AU - Terzi, Erdem
AU - Alwaseem, Hanan
AU - Pagano, Alexandra E.
AU - Heissel, Søren
AU - Molina, Henrik
AU - Allwein, Benjamin
AU - Kenny, Timothy C.
AU - Possemato, Richard L.
AU - Zhao, Li
AU - Hite, Richard K.
AU - Vinogradova, Ekaterina V.
AU - Mansy, Sheref S.
AU - Birsoy, Kıvanç
N1 - Publisher Copyright:
© 2023 American Association for the Advancement of Science. All rights reserved.
PY - 2023/11/17
Y1 - 2023/11/17
N2 - Mitochondria must maintain adequate amounts of metabolites for protective and biosynthetic functions. However, how mitochondria sense the abundance of metabolites and regulate metabolic homeostasis is not well understood. In this work, we focused on glutathione (GSH), a critical redox metabolite in mitochondria, and identified a feedback mechanism that controls its abundance through the mitochondrial GSH transporter, SLC25A39. Under physiological conditions, SLC25A39 is rapidly degraded by mitochondrial protease AFG3L2. Depletion of GSH dissociates AFG3L2 from SLC25A39, causing a compensatory increase in mitochondrial GSH uptake. Genetic and proteomic analyses identified a putative iron-sulfur cluster in the matrix-facing loop of SLC25A39 as essential for this regulation, coupling mitochondrial iron homeostasis to GSH import. Altogether, our work revealed a paradigm for the autoregulatory control of metabolic homeostasis in organelles.
AB - Mitochondria must maintain adequate amounts of metabolites for protective and biosynthetic functions. However, how mitochondria sense the abundance of metabolites and regulate metabolic homeostasis is not well understood. In this work, we focused on glutathione (GSH), a critical redox metabolite in mitochondria, and identified a feedback mechanism that controls its abundance through the mitochondrial GSH transporter, SLC25A39. Under physiological conditions, SLC25A39 is rapidly degraded by mitochondrial protease AFG3L2. Depletion of GSH dissociates AFG3L2 from SLC25A39, causing a compensatory increase in mitochondrial GSH uptake. Genetic and proteomic analyses identified a putative iron-sulfur cluster in the matrix-facing loop of SLC25A39 as essential for this regulation, coupling mitochondrial iron homeostasis to GSH import. Altogether, our work revealed a paradigm for the autoregulatory control of metabolic homeostasis in organelles.
UR - https://www.scopus.com/pages/publications/85177103865
U2 - 10.1126/SCIENCE.ADF4154
DO - 10.1126/SCIENCE.ADF4154
M3 - Article
C2 - 37917749
AN - SCOPUS:85177103865
SN - 0036-8075
VL - 382
SP - 820
EP - 828
JO - Science
JF - Science
IS - 6672
ER -