8BQW

Cryo-EM structure of alpha-synuclein filaments doublet from Juvenile-onset synucleinopathy


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.30 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

New SNCA mutation and structures of alpha-synuclein filaments from juvenile-onset synucleinopathy.

Yang, Y.Garringer, H.J.Shi, Y.Lovestam, S.Peak-Chew, S.Zhang, X.Kotecha, A.Bacioglu, M.Koto, A.Takao, M.Spillantini, M.G.Ghetti, B.Vidal, R.Murzin, A.G.Scheres, S.H.W.Goedert, M.

(2023) Acta Neuropathol 145: 561-572

  • DOI: https://doi.org/10.1007/s00401-023-02550-8
  • Primary Citation of Related Structures:  
    8BQV, 8BQW, 8CE7, 8CEB

  • PubMed Abstract: 

    A 21-nucleotide duplication in one allele of SNCA was identified in a previously described disease with abundant α-synuclein inclusions that we now call juvenile-onset synucleinopathy (JOS). This mutation translates into the insertion of MAAAEKT after residue 22 of α-synuclein, resulting in a protein of 147 amino acids. Both wild-type and mutant proteins were present in sarkosyl-insoluble material that was extracted from frontal cortex of the individual with JOS and examined by electron cryo-microscopy. The structures of JOS filaments, comprising either a single protofilament, or a pair of protofilaments, revealed a new α-synuclein fold that differs from the folds of Lewy body diseases and multiple system atrophy (MSA). The JOS fold consists of a compact core, the sequence of which (residues 36-100 of wild-type α-synuclein) is unaffected by the mutation, and two disconnected density islands (A and B) of mixed sequences. There is a non-proteinaceous cofactor bound between the core and island A. The JOS fold resembles the common substructure of MSA Type I and Type II dimeric filaments, with its core segment approximating the C-terminal body of MSA protofilaments B and its islands mimicking the N-terminal arm of MSA protofilaments A. The partial similarity of JOS and MSA folds extends to the locations of their cofactor-binding sites. In vitro assembly of recombinant wild-type α-synuclein, its insertion mutant and their mixture yielded structures that were distinct from those of JOS filaments. Our findings provide insight into a possible mechanism of JOS fibrillation in which mutant α-synuclein of 147 amino acids forms a nucleus with the JOS fold, around which wild-type and mutant proteins assemble during elongation.


  • Organizational Affiliation

    Medical Research Council Laboratory of Molecular Biology, Cambridge, UK.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Alpha-synucleinA,
B [auth C]
140Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P37840 (Homo sapiens)
Explore P37840 
Go to UniProtKB:  P37840
PHAROS:  P37840
GTEx:  ENSG00000145335 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP37840
Sequence Annotations
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  • Reference Sequence

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Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Unknown proteinC [auth B],
D
9Homo sapiensMutation(s): 0 
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 2.30 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION4.0
MODEL REFINEMENTREFMAC

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Medical Research Council (MRC, United Kingdom)United KingdomMC_UP_A025_1013
Medical Research Council (MRC, United Kingdom)United KingdomMC_U105184291 to M.G.
Alzheimers Research UK (ARUK)United Kingdom--
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2023-02-22
    Type: Initial release
  • Version 1.1: 2023-03-08
    Changes: Database references, Structure summary
  • Version 1.2: 2023-05-03
    Changes: Database references
  • Version 1.3: 2024-07-24
    Changes: Data collection