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Atomic structure of a toxic, oligomeric segment of SOD1 linked to amyotrophic lateral sclerosis (ALS)

Journal Article · · Proceedings of the National Academy of Sciences of the United States of America
 [1];  [1];  [2];  [1];  [1];  [1];  [3];  [1];  [2];  [1];  [4];  [1];  [1];  [4];  [1];  [5];  [2];  [1]
  1. Univ. of California, Los Angeles, CA (United States)
  2. David Geffen School of Medicine at UCLA, Los Angeles, CA (United States)
  3. D. E. Shaw Research, New York, NY (United States)
  4. Univ. of California, Santa Barbara, CA (United States)
  5. D. E. Shaw Research, New York, NY (United States); Columbia Univ., New York, NY (United States)
Fibrils and oligomers are the aggregated protein agents of neuronal dysfunction in ALS diseases. Whereas we now know much about fibril architecture, atomic structures of disease-related oligomers have eluded determination. Here, we determine the corkscrew-like structure of a cytotoxic segment of superoxide dismutase 1 (SOD1) in its oligomeric state. Mutations that prevent formation of this structure eliminate cytotoxicity of the segment in isolation as well as cytotoxicity of the ALS-linked mutants of SOD1 in primary motor neurons and in aDanio rerio(zebrafish) model of ALS. Cytotoxicity assays suggest that toxicity is a property of soluble oligomers, and not large insoluble aggregates. Here, our work adds to evidence that the toxic oligomeric entities in protein aggregation diseases contain antiparallel, out-of-register β-sheet structures and identifies a target for structure-based therapeutics in ALS.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL (United States)
Sponsoring Organization:
California Inst. for Regenerative Medicine (CIRM); Muscular Dystrophy Association; National Inst. of General Medical Sciences; National Inst. of Health (NIH); National Inst. of Neurological Disorders and Stroke; National Science Foundation
OSTI ID:
1390865
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 33 Vol. 114; ISSN 0027-8424
Publisher:
National Academy of SciencesCopyright Statement
Country of Publication:
United States
Language:
ENGLISH

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Cited By (14)

Pathological hydrogen peroxide triggers the fibrillization of wild-type SOD1 via sulfenic acid modification of Cys-111 journal January 2018
Epiplasts: Membrane Skeletons and Epiplastin Proteins in Euglenids, Glaucophytes, Cryptophytes, Ciliates, Dinoflagellates, and Apicomplexans journal October 2018
Prion-Like Propagation of Protein Misfolding and Aggregation in Amyotrophic Lateral Sclerosis journal November 2019
Structural mapping of oligomeric intermediates in an amyloid assembly pathway journal September 2019
Crystal structures of amyloidogenic segments of human transthyretin: Amyloid Structures of Transthyretin Segments journal June 2018
The biophysics of superoxide dismutase-1 and amyotrophic lateral sclerosis journal January 2019
A new era for understanding amyloid structures and disease journal September 2018
The proteostasis network and its decline in ageing journal February 2019
TDP-43 and RNA form amyloid-like myo-granules in regenerating muscle journal October 2018
Tryptophan 32-mediated SOD1 aggregation is attenuated by pyrimidine-like compounds in living cells journal October 2018
Cu 2+ selective chelators relieve copper-induced oxidative stress in vivo journal January 2018
Large SOD1 aggregates, unlike trimeric SOD1, do not impact cell viability in a model of amyotrophic lateral sclerosis journal April 2018
Invited Review: The role of prion‐like mechanisms in neurodegenerative diseases journal February 2020
Evolutionary Analyses of Sequence and Structure Space Unravel the Structural Facets of SOD1 journal December 2019

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