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Cited by 209

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Dorfin Ubiquitylates Mutant SOD1 and Prevents Mutant SOD1-mediated Neurotoxicity

Open access
Niwa, Jun-ichi, Ishigaki, Shinsuke, Hishikawa, Nozomi, Yamamoto, Masahiko, Doyu, Manabu, Murata, Shigeo, Tanaka, Keiji, Taniguchi, Naoyuki, Sobue, Gen·2002·Journal of Biological Chemistry

Abstract

Amyotrophic lateral sclerosis (ALS) is a progressive paralytic disorder resulting from the degeneration of motor neurons in the cerebral cortex, brainstem, and spinal cord. The cytopathological hallmark in the remaining motor neurons of ALS is the presence of ubiquitylated inclusions consisting of insoluble protein aggregates. In this paper we report that Dorfin, a RING finger-type E3 ubiquitin ligase, is predominantly localized in the inclusion bodies of familial ALS with a copper/zinc superoxide dismutase (SOD1) mutation as well as sporadic ALS. Dorfin physically bound and ubiquitylated various SOD1 mutants derived from familial ALS patients and enhanced their degradation, but it had no effect on the stability of the wild-type SOD1. The overexpression of Dorfin protected against the toxic effects of mutant SOD1 on neural cells and reduced SOD1 inclusions. Our results indicate that Dorfin protects neurons by recognizing and then ubiquitylating mutant SOD1 proteins followed by targeting them for proteasomal degradation.

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Metadata

Authors
Niwa, J.-I., Ishigaki, S., Hishikawa, N., Yamamoto, M., Doyu, M., Murata, S., Tanaka, K., Taniguchi, N., & Sobue, G.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2002-09
Volume
277
Issue
39
Pages
36793-36798
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2023219143
Cited by
209
References
8
FWCI
9.21
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Dorfin Ubiquitylates Mutant SOD1 and Prevents Mutant SOD1-mediated Neurotoxicity. https://app.cochat.ai/papers/10.1074/jbc.m206559200
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Niwa, J.-I., Ishigaki, S., Hishikawa, N., Yamamoto, M., Doyu, M., Murata, S., Tanaka, K., Taniguchi, N., & Sobue, G. (2002). Dorfin Ubiquitylates Mutant SOD1 and Prevents Mutant SOD1-mediated Neurotoxicity. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m206559200

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