Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Predict Membrane 

Global Symmetry: Cyclic - C7  (3D View)
Global Stoichiometry: Homo 7-mer - A7 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: microscopy

Macromolecule Content

• Total Structure Weight: 234.21 kDa 
• Atom Count: 16513 
• Modelled Residue Count: 2051 
• Deposited Residue Count: 2051 
• Unique protein chains: 1

7O1Q

Amyloid beta oligomer displayed on the alpha hemolysin scaffold

• PDB DOI: 10.2210/pdb7O1Q/pdb
• EM Map EMD-12696:EMDBEMDataResource

• Classification: TOXIN
• Organism(s): Staphylococcus aureus, Homo sapiens
• Expression System: Escherichia coli 'BL21-Gold(DE3)pLysS AG
• Mutation(s): No 
• Membrane Protein: Yes  OPM


• Deposited: 2021-03-30 Released: 2021-04-14 
• Deposition Author(s): Wu, J., Blum, T.B., Farrell, D.P., DiMaio, F., Abrahams, J.P., Luo, J.

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.40 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Literature

Cryo-electron Microscopy Imaging of Alzheimer's Amyloid-beta 42 Oligomer Displayed on a Functionally and Structurally Relevant Scaffold.

Wu, J., Blum, T.B., Farrell, D.P., DiMaio, F., Abrahams, J.P., Luo, J.

(2021) Angew Chem Int Ed Engl 60: 18680-18687

• PubMed: 34042235 
• DOI: 10.1002/anie.202104497
• Primary Citation of Related Structures:  
  7O1Q


• PubMed Abstract: 
  

Amyloid-β peptide (Aβ) oligomers are pathogenic species of amyloid aggregates in Alzheimer's disease. Like certain protein toxins, Aβ oligomers permeabilize cellular membranes, presumably through a pore formation mechanism. Due to their structural and stoichiometric heterogeneity, the structure of these pores remains to be characterized. We studied a functional Aβ42-pore equivalent, created by fusing Aβ42 to the oligomerizing, soluble domain of the α-hemolysin (αHL) toxin. Our data reveal Aβ42-αHL oligomers to share major structural, functional and biological properties with wild-type Aβ42-pores. Single-particle cryo-EM analysis of Aβ42-αHL oligomers (with an overall resolution of 3.3 Å) reveals the Aβ42-pore region to be intrinsically flexible. We anticipate that the Aβ42-αHL oligomers will allow studying many of the features of the wild type amyloid oligomers that cannot be studied otherwise, and may represent a highly specific antigen for the development of immuno-base diagnostics and therapies.

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Organizational Affiliation: 

SWITZERLAND.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Alpha-hemolysin hybridized Abeta	A, B, C, D, E, F, G	293	Staphylococcus aureus, Homo sapiens	Mutation(s): 0  Gene Names: hly, hla, APP, A4, AD1 Membrane Entity: Yes
UniProt & NIH Common Fund Data Resources
Find proteins for Q2G1X0 (Staphylococcus aureus (strain NCTC 8325 / PS 47)) Explore Q2G1X0  Go to UniProtKB:  Q2G1X0
Find proteins for P05067 (Homo sapiens) Explore P05067  Go to UniProtKB:  P05067
PHAROS:  P05067
UniProt Groups	P05067Q2G1X0

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.40 Å
• Aggregation State: PARTICLE 
• Reconstruction Method: SINGLE PARTICLE 

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2021-03-30 
• Released Date: 2021-04-14 
Deposition Author(s): Wu, J., Blum, T.B., Farrell, D.P., DiMaio, F., Abrahams, J.P., Luo, J.

Revision History  

• Version 1.0: 2021-04-14
  Type: Initial release
  
• Version 1.1: 2021-06-09
  Changes: Database references
• Version 1.2: 2021-08-18
  Changes: Database references