6OSM

Cryo-EM structure of the N-terminally acetylated C-terminal Alpha-synuclein truncation Ac1-103


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural Insights into alpha-Synuclein Fibril Polymorphism: Effects of Parkinson's Disease-Related C-Terminal Truncations.

Ni, X.McGlinchey, R.P.Jiang, J.Lee, J.C.

(2019) J Mol Biol 431: 3913-3919

  • DOI: 10.1016/j.jmb.2019.07.001
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Lewy bodies, hallmarks of Parkinson's disease, contain C-terminally truncated (ΔC) α-synuclein (α-syn). Here, we report fibril structures of three N-terminally acetylated (Ac) α-syn constructs, Ac1-140, Ac1-122, and Ac1-103, solved by cryoelectron mi ...

    Lewy bodies, hallmarks of Parkinson's disease, contain C-terminally truncated (ΔC) α-synuclein (α-syn). Here, we report fibril structures of three N-terminally acetylated (Ac) α-syn constructs, Ac1-140, Ac1-122, and Ac1-103, solved by cryoelectron microscopy. Both ΔC-α-syn variants exhibited faster aggregation kinetics, and Ac1-103 fibrils efficiently seeded the full-length protein, highlighting their importance in pathogenesis. Interestingly, fibril helical twists increased upon the removal of C-terminal residues and can be propagated through cross-seeding. Compared to that of Ac1-140, increased electron densities were seen in the N-terminus of Ac1-103, whereas the C-terminus of Ac1-122 appeared more structured. In accord, the respective termini of ΔC-α-syn exhibited increased protease resistance. Despite similar amyloid core residues, distinctive features were seen for both Ac1-122 and Ac1-103. Particularly, Ac1-103 has the tightest packed core with an additional turn, likely attributable to conformational changes in the N-terminal region. These molecular differences offer insights into the effect of C-terminal truncations on α-syn fibril polymorphism.


    Organizational Affiliation

    Laboratory of Protein Conformation and Dynamics, Biochemistry and Biophysics Center. National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, MD 20892, USA. Electronic address: leej4@nhlbi.nih.gov.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Alpha-synuclein
A, B, C, D, E, F, G, H, I, J
140Homo sapiensMutation(s): 0 
Gene Names: SNCANACPPARK1
Find proteins for P37840 (Homo sapiens)
Go to UniProtKB:  P37840
NIH Common Fund Data Resources
PHAROS  P37840
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.40 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Heart, Lung, and Blood Institute (NIH/NHLBI)United States--

Revision History 

  • Version 1.0: 2019-09-25
    Type: Initial release
  • Version 1.1: 2019-12-04
    Changes: Author supporting evidence
  • Version 1.2: 2019-12-18
    Changes: Other