Cysteine residues in Cu,Zn-superoxide dismutase are essential to toxicity in Caenorhabditis elegans model of amyotrophic lateral sclerosis

Mariko Ogawa, Hisashi Shidara, Kotaro Oka, Masaru Kurosawa, Nobuyuki Nukina, Yoshiaki Furukawa

研究成果: Article査読

7 被引用数 (Scopus)

抄録

Dominant mutations in Cu,Zn-superoxide dismutase (SOD1) cause a familial form of amyotrophic lateral sclerosis (ALS). A pathological hallmark of the familial ALS is the formation of mutant SOD1 aggregates, leading to the proposal that SOD1 gains toxicities through protein misfolding triggered by mutations. Nevertheless, molecular requirements for mutant SOD1 to acquire pathogenicity still remain obscure. Here, we show that Cys residues in SOD1 are essential to exerting toxicities of SOD1 in a Caenorhabditis elegans model. Exogenous expression of wild-type as well as pathogenic mutant SOD1 fused with a fluorescent protein in C. elegans resulted in the accumulation of disulfide-reduced SOD1 and retarded the worm's motility. In contrast, little effects of exogenously expressed SOD1 on the motility were observed when all four Cys residues in SOD1 were replaced with Ser. Taken together, we propose that deregulation of Cys chemistry in SOD1 proteins is involved in the pathogenesis of SOD1-related ALS.

本文言語English
ページ(範囲)1196-1202
ページ数7
ジャーナルBiochemical and Biophysical Research Communications
463
4
DOI
出版ステータスPublished - 2015 7 13

ASJC Scopus subject areas

  • 生物理学
  • 生化学
  • 分子生物学
  • 細胞生物学

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