Biological Assembly 1  

Global Symmetry: Helical - H  (3D View)
Global Stoichiometry: Homo 7-mer - A7 

Biological assembly 1 assigned by authors.

Biological Assembly Evidence: electron microscopy

Macromolecule Content

• Total Structure Weight: 321.44 kDa 
• Atom Count: 4,109 
• Modelled Residue Count: 539 
• Deposited Residue Count: 3,087 
• Unique protein chains: 1

 8BGV

Tau Paired Helical Filament from Cellular Fraction of Alzheimer's disease brain

• PDB DOI:  https://doi.org/10.2210/pdb8BGV/pdb
• EM Map EMD-16039: EMDB EMDataResource

• Classification: PROTEIN FIBRIL
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 2022-10-28 Released: 2023-05-24 
• Deposition Author(s): Behr, T.S., Ryskeldi-Falcon, B.
• Funding Organization(s): Medical Research Council (MRC, United Kingdom)

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Experimental Data Snapshot

• Method: ELECTRON MICROSCOPY
• Resolution: 3.27 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Literature

Tau filaments are tethered within brain extracellular vesicles in Alzheimer's disease.

Fowler, S.L., Behr, T.S., Turkes, E., Cauhy, P.M., Foiani, M.S., Schaler, A., Crowley, G., Bez, S., Ficulle, E., Tsefou, E., O'Brien, D.P., Fischer, R., Geary, B., Gaur, P., Miller, C., D'Acunzo, P., Levy, E., Duff, K.E., Ryskeldi-Falcon, B.

(2023) Biorxiv 

• PubMed: 37163117 
• DOI: https://doi.org/10.1101/2023.04.30.537820
• Primary Citation of Related Structures:  
  8BGS, 8BGV


• PubMed Abstract: 
  

The abnormal assembly of tau protein in neurons is the pathological hallmark of multiple neurodegenerative diseases, including Alzheimer's disease (AD). In addition, assembled tau associates with extracellular vesicles (EVs) in the central nervous system of patients with AD, which is linked to its clearance and prion-like propagation between neurons. However, the identities of the assembled tau species and the EVs, as well as how they associate, are not known. Here, we combined quantitative mass spectrometry, cryo-electron tomography and single-particle cryo-electron microscopy to study brain EVs from AD patients. We found filaments of truncated tau enclosed within EVs enriched in endo-lysosomal proteins. We observed multiple filament interactions, including with molecules that tethered filaments to the EV limiting membrane, suggesting selective packaging. Our findings will guide studies into the molecular mechanisms of EV-mediated secretion of assembled tau and inform the targeting of EV-associated tau as potential therapeutic and biomarker strategies for AD.

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Organizational Affiliation: 

Complex of NBICS Technologies, National Research Center "Kurchatov Institute", Moscow, 123182, Russia. Electronic address: [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Microtubule-associated protein tau	A [auth n], B [auth A], C [auth B], D [auth C], E [auth D], F [auth E], G [auth F]	441	Homo sapiens	Mutation(s): 0  Gene Names: MAPT, MAPTL, MTBT1, TAU
UniProt & NIH Common Fund Data Resources
Find proteins for P10636 (Homo sapiens) Explore P10636  Go to UniProtKB:  P10636
PHAROS:  P10636

Experimental Data & Validation

Experimental Data

• Method: ELECTRON MICROSCOPY
• Resolution: 3.27 Å
• Aggregation State: FILAMENT 
• Reconstruction Method: HELICAL 

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2023-05-24 
Deposition Author(s): Behr, T.S., Ryskeldi-Falcon, B.

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Funding Organization	Location	Grant Number
Medical Research Council (MRC, United Kingdom)	United Kingdom	MC_UP_1201/25

Revision History  

• Version 1.0: 2023-05-24
  Type: Initial release