7UAK

Structure of recombinantly assembled A53E alpha-synuclein fibrils

  • Classification: PROTEIN FIBRIL
  • Organism(s): Homo sapiens
  • Expression System: Escherichia coli 'BL21-Gold(DE3)pLysS AG
  • Mutation(s): Yes 

  • Deposited: 2022-03-13 Released: 2023-03-29 
  • Deposition Author(s): Zhou, K., Zhou, H.
  • Funding Organization(s): National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS), National Institutes of Health/National Center for Research Resources (NIH/NCRR)

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.38 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Cryo-EM structure of amyloid fibril formed by alpha-synuclein hereditary A53E mutation reveals a distinct protofilament interface.

Sun, C.Zhou, K.DePaola IV, P.Shin, W.S.Hillyer, T.Sawaya, M.R.Zhu, R.Peng, C.Zhou, Z.H.Jiang, L.

(2023) J Biol Chem 299: 104566-104566

  • DOI: https://doi.org/10.1016/j.jbc.2023.104566
  • Primary Citation of Related Structures:  
    7UAK

  • PubMed Abstract: 

    Synucleinopathies like Parkinson's disease (PD), dementia with Lewy bodies (DLB), and multiple systems atrophy (MSA), have the same pathologic feature of misfolded α-synuclein protein (α-syn) accumulation in the brain. PD patients who carry α-syn hereditary mutations tend to have earlier onset and more severe clinical symptoms than sporadic PD patients. Therefore, revealing the effect of hereditary mutations to the α-syn fibril structure can help us understand these synucleinopathies' structural basis. Here, we present a 3.38 Å cryo-electron microscopy structure of α-synuclein fibrils containing the hereditary A53E mutation. The A53E fibril is symmetrically composed of two protofilaments, similar to other fibril structures of WT and mutant α-synuclein. The new structure is distinct from all other synuclein fibrils, not only at the interface between proto-filaments, but also between residues packed within the same proto-filament. A53E has the smallest interface with the least buried surface area among all α-syn fibrils, consisting of only two contacting residues. Within the same protofilament, A53E reveals distinct residue re-arrangement and structural variation at a cavity near its fibril core. Moreover, the A53E fibrils exhibit slower fibril formation and lower stability compared to WT and other mutants like A53T and H50Q, while also demonstrate strong cellular seeding in α-synuclein biosensor cells and primary neurons. In summary, our study aims to highlight structural differences - both within and between the protofilaments of A53E fibrils - and interpret fibril formation and cellular seeding of α-synuclein pathology in disease, which could further our understanding of the structure-activity relationship of α-synuclein mutants.


  • Organizational Affiliation

    Department of Neurology, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Alpha-synuclein
A, B, C, D, E
A, B, C, D, E, F
140Homo sapiensMutation(s): 1 
Gene Names: SNCANACPPARK1
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
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.38 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION3.1.2
MODEL REFINEMENTPHENIX1.18.2

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)United StatesAG 060149
National Institutes of Health/National Center for Research Resources (NIH/NCRR)United States1S10OD018111

Revision History  (Full details and data files)

  • Version 1.0: 2023-03-29
    Type: Initial release
  • Version 1.1: 2023-04-12
    Changes: Database references
  • Version 1.2: 2024-06-12
    Changes: Data collection, Refinement description