Cited by 317Parkinson's Disease Mechanisms and TreatmentsAlzheimer's disease research and treatmentsNuclear Receptors and Signaling

Parkinson-causing α-synuclein missense mutations shift native tetramers to monomers as a mechanism for disease initiation

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Dettmer, Ulf, Newman, Andrew J., Soldner, Frank, Luth, Eric S., Kim, Nora C., von Saucken, Victoria E., Sanderson, John B., Jaenisch, Rudolf +2 more·2015·Nature Communications

Abstract

β-Sheet-rich α-synuclein (αS) aggregates characterize Parkinson’s disease (PD). αS was long believed to be a natively unfolded monomer, but recent work suggests it also occurs in α-helix-rich tetramers. Crosslinking traps principally tetrameric αS in intact normal neurons, but not after cell lysis, suggesting a dynamic equilibrium. Here we show that freshly biopsied normal human brain contains abundant αS tetramers. The PD-causing mutation A53T decreases tetramers in mouse brain. Neurons derived from an A53T patient have decreased tetramers. Neurons expressing E46K do also, and adding 1-2 E46K-like mutations into the canonical αS repeat motifs (KTKEGV) further reduces tetramers, decreases αS solubility and induces neurotoxicity and round inclusions. The other three fPD missense mutations likewise decrease tetramer:monomer ratios. The destabilization of physiological tetramers by PD-causing missense mutations and the neurotoxicity and inclusions induced by markedly decreasing tetramers suggest that decreased α-helical tetramers and increased unfolded monomers initiate pathogenesis. Tetramer-stabilizing compounds should prevent this.

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  • In human brain lysates, human neuronal cultures, mouse models, and cell lines expressing familial PD αSyn mutations (A53T or E46K), a decrease in the tetramer:monomer ratio correlates with increased neurotoxicity.

    “in human brain lysates, human neuronal cultures, mouse models, and in mouse/human/goat cell lines expressing familial PD αSyn mutations (A53T or E46K), a decrease in the tetramer:monomer ratio correlated to increased neurotoxicity”

    From α-synuclein in the pathophysiology of Alzheimer’s disease (2019) · cites this paper as [139]

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Authors
Dettmer, U., Newman, A. J., Soldner, F., Luth, E. S., Kim, N. C., von Saucken, V. E., Sanderson, J. B., Jaenisch, R., Bartels, T., & Selkoe, D.
Affiliations
  • Brigham and Women's Hospital (US)
  • Whitehead Institute for Biomedical Research (US)
Corresponding author
Selkoe, Dennis
Venue
Nature Communications
Published
2015-06-16
Volume
6
Issue
1
Pages
7314-7314
ISSN
2041-1723 (ISSN-L)
OpenAlex
W1886318170
Cited by
317
References
56
Citations by year
2026: 15 · 2025: 23 · 2024: 24 · 2023: 22 · 2022: 19 · 2021: 32 · 2020: 35 · 2019: 43 · 2018: 29 · 2017: 33 · 2016: 31 · 2015: 11
FWCI
24.43
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • DSpace@MIT (Massachusetts Institute of Technology) (submittedVersion, cc-by-nc)
  • Digital Access to Scholarship at Harvard (DASH) (Harvard University) (submittedVersion, cc-by)
  • RePEc: Research Papers in Economics (submittedVersion)
Funders
  • Parkinson's Disease Foundation
  • National Institutes of Health (HD 045022, R01-NS083845, NS083845)
  • Fidelity Biosciences
  • National Cancer Institute (5R37 CA84198, R37CA084198)
  • National Institute of Neurological Disorders and Stroke (RF1NS083845, R01NS083845)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD045022, HD045022, R37HD045022)
Topics
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nuclear Receptors and Signaling
Keywords
alpha-synuclein, Parkinson's disease, missense mutations, A53T mutation, E46K mutation, tetramer, monomers, protein aggregation, neurotoxicity, tetramer stabilization, disease initiation, human brain
MeSH terms
Animals, Brain, Enzyme-Linked Immunosorbent Assay, Humans, Immunohistochemistry, Neurons, Parkinson Disease, Immunoblotting, Rats, Sprague-Dawley, Mutation, Missense, Protein Structure, Quaternary, Mice, Rats, alpha-Synuclein, Induced Pluripotent Stem Cells

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