8AZT

Type II amyloid-beta 42 filaments from high-spin supernatants of aqueous extracts from Alzheimer's disease brains | ABeta42


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 2.3 of the entry. See complete history


Literature

Abundant A beta fibrils in ultracentrifugal supernatants of aqueous extracts from Alzheimer's disease brains.

Stern, A.M.Yang, Y.Jin, S.Yamashita, K.Meunier, A.L.Liu, W.Cai, Y.Ericsson, M.Liu, L.Goedert, M.Scheres, S.H.W.Selkoe, D.J.

(2023) Neuron 111: 2012

  • DOI: https://doi.org/10.1016/j.neuron.2023.04.007
  • Primary Citation of Related Structures:  
    8AZS, 8AZT, 8AZU

  • PubMed Abstract: 

    Soluble oligomers of amyloid β-protein (Aβ) have been defined as aggregates in supernatants following ultracentrifugation of aqueous extracts from Alzheimer's disease (AD) brains and are believed to be upstream initiators of synaptic dysfunction, but little is known about their structures. We now report the unexpected presence of Aβ fibrils in synaptotoxic high-speed supernatants from AD brains extracted by soaking in an aqueous buffer. The fibrils did not appear to form during preparation, and their counts by EM correlated with Aβ ELISA quantification. Cryo-EM structures of aqueous Aβ fibrils were identical to those from sarkosyl-insoluble homogenates. The fibrils in aqueous extracts were labeled by lecanemab, an Aβ aggregate-directed antibody reported to improve AD cognitive outcomes. Lecanemab provided protection against aqueous fibril synaptotoxicity. We conclude that fibrils are abundant in aqueous extracts from AD brains and have the same structures as those from plaques. These findings have implications for AD pathogenesis and drug design.


  • Organizational Affiliation

    Ann Romney Center for Neurologic Diseases, Department of Neurology, Harvard Medical School and Brigham and Women's Hospital, Boston, MA 02115, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Amyloid-beta precursor proteinA [auth B]42Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P05067 (Homo sapiens)
Explore P05067 
Go to UniProtKB:  P05067
PHAROS:  P05067
GTEx:  ENSG00000142192 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05067
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 3.70 Å
  • Aggregation State: FILAMENT 
  • Reconstruction Method: HELICAL 
EM Software:
TaskSoftware PackageVersion
RECONSTRUCTIONRELION
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_1201/25
Medical Research Council (MRC, United Kingdom)United KingdomMC_UP_A025_1013
Medical Research Council (MRC, United Kingdom)United KingdomMC_U105184291

Revision History  (Full details and data files)

  • Version 1.0: 2022-11-02
    Type: Initial release
  • Version 2.0: 2022-11-23
    Type: Coordinate replacement
    Reason: Model orientation/position
    Changes: Atomic model, Data collection, Refinement description, Structure summary
  • Version 2.1: 2023-05-24
    Changes: Database references, Refinement description
  • Version 2.2: 2023-07-19
    Changes: Database references
  • Version 2.3: 2024-07-24
    Changes: Data collection, Refinement description