| Autor: |
Tatsuya Sato, Hsiang-Chun Chang, Bayeva, Marina, Shapiro, Jason S., Ramos-Alonso, Lucia, Hidemichi Kouzu, Xinghang Jiang, Ting Liu, Sumeyye Yar, Sawicki, Konrad T., Chunlei Chen, Martínez-Pastor, María Teresa, Stumpo, Deborah J., Schumacker, Paul T., Blackshear, Perry J., Ben-Sahra, Issam, Puig, Sergi, Ardehali, Hossein |
| Předmět: |
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| Zdroj: |
Proceedings of the National Academy of Sciences of the United States of America; 7/3/2018, Vol. 115 Issue 27, pE6291-E6300, 10p |
| Abstrakt: |
Cells respond to iron deficiency by activating iron-regulatory proteins to increase cellular iron uptake and availability. However, it is not clear how cells adapt to conditions when cellular iron uptake does not fully match iron demand. Here, we show that the mRNA-binding protein tristetraprolin (TTP) is induced by iron deficiency and degrades mRNAs of mitochondrial Fe/S-cluster-containing proteins, specifically Ndufsl in complex I and Uqcrfsl in complex III, to match the decrease in Fe/S-cluster availability. In the absence of TTP, Uqcrfsl levels are not decreased in iron deficiency, resulting in nonfunctional complex III, electron leakage, and oxidative damage. Mice with deletion of Ttp display cardiac dysfunction with iron deficiency, demonstrating that TTP is necessary for maintaining cardiac function in the setting of low cellular iron. Altogether, our results describe a pathway that is activated in iron deficiency to regulate mitochondrial function to match the availability of Fe/S clusters. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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