한빛사논문
Namgyu Lee1,2,9, Sung Jin Park 3,9, Mike Lange4,5, Tenzin Tseyang3, Mihir B. Doshi2, Tae Yong Kim6, Yoseb Song7, Dong In Kim6, Paul L. Greer3, James A. Olzmann4,5,8, Jessica B. Spinelli3 & Dohoon Kim1
1Department of Molecular, Cell and Cancer Biology, University of Massachusetts Chan Medical School, Worcester, MA, USA.
2Department of Biomedical Science & Engineering, Dankook University, Cheonan, Republic of Korea.
3Program in Molecular Medicine, University of Massachusetts Chan Medical School, Worcester, MA, USA.
4Department of Molecular and Cell Biology, University of California, Berkeley, Berkeley, CA, USA.
5Department of Nutritional Sciences and Toxicology, University of California, Berkeley, Berkeley, CA, USA.
6Standigm, Inc., Seoul, Republic of Korea.
7Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA, USA.
8Chan Zuckerberg Biohub, San Francisco, CA, USA.
9These authors contributed equally: Namgyu Lee, Sung Jin Park.
Corresponding authors : Correspondence to Namgyu Lee or Dohoon Kim.
Abstract
The canonical biological function of selenium is in the production of selenocysteine residues of selenoproteins, and this forms the basis for its role as an essential antioxidant and cytoprotective micronutrient. Here we demonstrate that, via its metabolic intermediate hydrogen selenide, selenium reduces ubiquinone in the mitochondria through catalysis by sulfide quinone oxidoreductase. Through this mechanism, selenium rapidly protects against lipid peroxidation and ferroptosis in a timescale that precedes selenoprotein production, doing so even when selenoprotein production has been eliminated. Our findings identify a regulatory mechanism against ferroptosis that implicates sulfide quinone oxidoreductase and expands our understanding of selenium in biology.
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