unseeded Abeta(1-40) amyloid fibril (morphology ii)

Experimental Data Snapshot

  • Resolution: 2.73 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 

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Cryo-EM Analysis of the Effect of Seeding with Brain-derived A beta Amyloid Fibrils.

Pfeiffer, P.B.Ugrina, M.Schwierz, N.Sigurdson, C.J.Schmidt, M.Fandrich, M.

(2023) J Mol Biol 436: 168422-168422

  • DOI: https://doi.org/10.1016/j.jmb.2023.168422
  • Primary Citation of Related Structures:  
    8OT1, 8OT3, 8OT4

  • PubMed Abstract: 

    Aβ amyloid fibrils from Alzheimer's brain tissue are polymorphic and structurally different from typical in vitro formed Aβ fibrils. Here, we show that brain-derived (ex vivo) fibril structures can be proliferated by seeding in vitro. The proliferation reaction is only efficient for one of the three abundant ex vivo Aβ fibril morphologies, which consists of two peptide stacks, while the inefficiently proliferated fibril morphologies contain four or six peptide stacks. In addition to the seeded fibril structures, we find that de novo nucleated fibril structures can emerge in seeded samples if the seeding reaction is continued over multiple generations. These data imply a competition between de novo nucleation and seed extension and suggest further that seeding favours the outgrowth of fibril morphologies that contain fewer peptide stacks.

  • Organizational Affiliation

    Institute of Protein Biochemistry, Ulm University, Helmholtzstraße 8/1, 89081 Ulm, Germany. Electronic address: peter.pfeiffer@uni-ulm.de.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Amyloid-beta A4 protein
A, B, C, D, E
A, B, C, D, E, F, G, H, I, J, K, L
40Homo sapiensMutation(s): 0 
Find proteins for B4DM00 (Homo sapiens)
Explore B4DM00 
Go to UniProtKB:  B4DM00
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupB4DM00
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.73 Å
  • Aggregation State: HELICAL ARRAY 
  • Reconstruction Method: HELICAL 
EM Software:
TaskSoftware PackageVersion

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
German Research Foundation (DFG)GermanyFA 456/24-1

Revision History  (Full details and data files)

  • Version 1.0: 2024-02-07
    Type: Initial release