期刊
MOLECULAR CELL
卷 52, 期 1, 页码 75-86出版社
CELL PRESS
DOI: 10.1016/j.molcel.2013.08.038
关键词
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资金
- Ministry of Education, Culture, Sports, Science and Technology of Japan
- National Institute of Biomedical Innovation
- Tokyo Biochemical Research Foundation
- Takeda Science Foundation
- Uehara Memorial Foundation
- Suzuken Memorial Foundation
- Mochida Memorial Foundation for Medical and Pharmaceutical Research
- Nakabayashi Trust for ALS Research
- Grants-in-Aid for Scientific Research [20229004, 13J10826, 25870562, 25650061, 24659027, 25650004, 24390418] Funding Source: KAKEN
Zinc is an essential trace element, and impaired zinc homeostasis is implicated in the pathogenesis of various human diseases. However, the mechanisms cells use to respond to zinc deficiency are poorly understood. We previously reported that amyotrophic lateral sclerosis (ALS)-linked pathogenic mutants of SOD1 cause chronic endoplasmic reticulum (ER) stress through specific interactions with Derlin-1, which is a component of the ER-associated degradation machinery. Moreover, we recently demonstrated that this interaction is common to ALS-linked SOD1 mutants, and wild-type SOD1 (SOD1(WT)) comprises a masked Derlin-1 binding region (DBR). Here, we found that, under zinc-deficient conditions, SOD1(WT) adopts a mutant-like conformation that exposes the DBR and induces the homeostatic ER stress response, including the inhibition of protein synthesis and induction of a zinc transporter. We conclude that SOD1 has a function as a molecular switch that activates the ER stress response, which plays an important role in cellular homeostasis under zinc-deficient conditions.
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