6PEO

Cryo-EM structure of alpha-synuclein H50Q Narrow Fibril


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.3 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structures of fibrils formed by alpha-synuclein hereditary disease mutant H50Q reveal new polymorphs.

Boyer, D.R.Li, B.Sun, C.Fan, W.Sawaya, M.R.Jiang, L.Eisenberg, D.S.

(2019) Nat.Struct.Mol.Biol. 26: 1044-1052

  • DOI: 10.1038/s41594-019-0322-y
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Deposits of amyloid fibrils of α-synuclein are the histological hallmarks of Parkinson's disease, dementia with Lewy bodies and multiple system atrophy, with hereditary mutations in α-synuclein linked to the first two of these conditions. Seeing the ...

    Deposits of amyloid fibrils of α-synuclein are the histological hallmarks of Parkinson's disease, dementia with Lewy bodies and multiple system atrophy, with hereditary mutations in α-synuclein linked to the first two of these conditions. Seeing the changes to the structures of amyloid fibrils bearing these mutations may help to understand these diseases. To this end, we determined the cryo-EM structures of α-synuclein fibrils containing the H50Q hereditary mutation. We find that the H50Q mutation results in two previously unobserved polymorphs of α-synuclein: narrow and wide fibrils, formed from either one or two protofilaments, respectively. These structures recapitulate conserved features of the wild-type fold but reveal new structural elements, including a previously unobserved hydrogen-bond network and surprising new protofilament arrangements. The structures of the H50Q polymorphs help to rationalize the faster aggregation kinetics, higher seeding capacity in biosensor cells and greater cytotoxicity that we observe for H50Q compared to wild-type α-synuclein.


    Organizational Affiliation

    Department of Neurology, David Geffen School of Medicine, Molecular Biology Institute, UCLA, Los Angeles, CA, USA. jianglin@ucla.edu.,Department of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, Molecular Biology Institute and Howard Hughes Medical Institute, UCLA, Los Angeles, CA, USA. david@mbi.ucla.edu.,Department of Neurology, David Geffen School of Medicine, Molecular Biology Institute, UCLA, Los Angeles, CA, USA.,Department of Chemistry and Biochemistry and Biological Chemistry, UCLA-DOE Institute, Molecular Biology Institute and Howard Hughes Medical Institute, UCLA, Los Angeles, CA, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Alpha-synuclein
A, B, C, D, E
140Homo sapiensMutation(s): 1 
Gene Names: SNCA (NACP, PARK1)
Find proteins for P37840 (Homo sapiens)
Go to Gene View: SNCA
Go to UniProtKB:  P37840
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.3 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute on Aging (NIH/NIA)United StatesAG054022
National Institutes of Health/National Institute on Aging (NIH/NIA)United StatesAG061847
Department of Energy (DOE, United States)United StatesDE-FC02-02ER63421

Revision History 

  • Version 1.0: 2019-11-27
    Type: Initial release