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- EMDB-23894: Paired helical tau filament extracted from GSS Patient brain tiss... -

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Basic information

Entry
Database: EMDB / ID: EMD-23894
TitlePaired helical tau filament extracted from GSS Patient brain tissue | tau filament from Gerstmann Straussler Scheinker disease | PHF Tau
Map data
Sample
  • Organelle or cellular component: SF filament extracted from PrP-CAA Patient brain tissue
    • Protein or peptide: Isoform Tau-F of Microtubule-associated protein tau
Function / homologyActivation of AMPK downstream of NMDARs / PKR-mediated signaling / Isoform Tau-F of Microtubule-associated protein tau
Function and homology information
Biological speciesHomo sapiens (human) / Human (human)
Methodhelical reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsHoq MR
Funding support United States, 1 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of Neurological Disorders and Stroke (NIH/NINDS)R01-AG071177 United States
CitationJournal: Acta Neuropathol / Year: 2021
Title: Structure of Tau filaments in Prion protein amyloidoses.
Authors: Grace I Hallinan / Md Rejaul Hoq / Manali Ghosh / Frank S Vago / Anllely Fernandez / Holly J Garringer / Ruben Vidal / Wen Jiang / Bernardino Ghetti /
Abstract: In human neurodegenerative diseases associated with the intracellular aggregation of Tau protein, the ordered cores of Tau filaments adopt distinct folds. Here, we analyze Tau filaments isolated from ...In human neurodegenerative diseases associated with the intracellular aggregation of Tau protein, the ordered cores of Tau filaments adopt distinct folds. Here, we analyze Tau filaments isolated from the brain of individuals affected by Prion-Protein cerebral amyloid angiopathy (PrP-CAA) with a nonsense mutation in the PRNP gene that leads to early termination of translation of PrP (Q160Ter or Q160X), and Gerstmann-Sträussler-Scheinker (GSS) disease, with a missense mutation in the PRNP gene that leads to an amino acid substitution at residue 198 (F198S) of PrP. The clinical and neuropathologic phenotypes associated with these two mutations in PRNP are different; however, the neuropathologic analyses of these two genetic variants have consistently shown the presence of numerous neurofibrillary tangles (NFTs) made of filamentous Tau aggregates in neurons. We report that Tau filaments in PrP-CAA (Q160X) and GSS (F198S) are composed of 3-repeat and 4-repeat Tau isoforms, having a striking similarity to NFTs in Alzheimer disease (AD). In PrP-CAA (Q160X), Tau filaments are made of both paired helical filaments (PHFs) and straight filaments (SFs), while in GSS (F198S), only PHFs were found. Mass spectrometry analyses of Tau filaments extracted from PrP-CAA (Q160X) and GSS (F198S) brains show the presence of post-translational modifications that are comparable to those seen in Tau aggregates from AD. Cryo-EM analysis reveals that the atomic models of the Tau filaments obtained from PrP-CAA (Q160X) and GSS (F198S) are identical to those of the Tau filaments from AD, and are therefore distinct from those of Pick disease, chronic traumatic encephalopathy, and corticobasal degeneration. Our data support the hypothesis that in the presence of extracellular amyloid deposits and regardless of the primary amino acid sequence of the amyloid protein, similar molecular mechanisms are at play in the formation of identical Tau filaments.
History
DepositionApr 23, 2021-
Header (metadata) releaseJul 28, 2021-
Map releaseJul 28, 2021-
UpdateFeb 16, 2022-
Current statusFeb 16, 2022Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.014
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.014
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-7mkh
  • Surface level: 0.014
  • Imaged by UCSF Chimera
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  • Simplified surface model + fitted atomic model
  • Atomic modelsPDB-7mkh
  • Imaged by Jmol
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_23894.png

Downloads & links

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Map

FileDownload / File: emd_23894.map.gz / Format: CCP4 / Size: 125 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Voxel sizeX=Y=Z: 1.078 Å
Density
Contour LevelBy AUTHOR: 0.02 / Movie #1: 0.014
Minimum - Maximum-0.010446381 - 0.036766414
Average (Standard dev.)0.0005641114 (±0.0025429106)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions320320320
Spacing320320320
CellA=B=C: 344.96 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z1.0781.0781.078
M x/y/z320320320
origin x/y/z0.0000.0000.000
length x/y/z344.960344.960344.960
α/β/γ90.00090.00090.000
start NX/NY/NZ1331310
NX/NY/NZ223226424
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS320320320
D min/max/mean-0.0100.0370.001

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Supplemental data

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Sample components

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Entire : SF filament extracted from PrP-CAA Patient brain tissue

EntireName: SF filament extracted from PrP-CAA Patient brain tissue
Components
  • Organelle or cellular component: SF filament extracted from PrP-CAA Patient brain tissue
    • Protein or peptide: Isoform Tau-F of Microtubule-associated protein tau

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Supramolecule #1: SF filament extracted from PrP-CAA Patient brain tissue

SupramoleculeName: SF filament extracted from PrP-CAA Patient brain tissue
type: organelle_or_cellular_component / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 79 kDa/nm

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Macromolecule #1: Isoform Tau-F of Microtubule-associated protein tau

MacromoleculeName: Isoform Tau-F of Microtubule-associated protein tau / type: protein_or_peptide / ID: 1 / Number of copies: 10 / Enantiomer: LEVO
Source (natural)Organism: Human (human)
Molecular weightTheoretical: 45.919871 KDa
SequenceString: MAEPRQEFEV MEDHAGTYGL GDRKDQGGYT MHQDQEGDTD AGLKESPLQT PTEDGSEEPG SETSDAKSTP TAEDVTAPLV DEGAPGKQA AAQPHTEIPE GTTAEEAGIG DTPSLEDEAA GHVTQARMVS KSKDGTGSDD KKAKGADGKT KIATPRGAAP P GQKGQANA ...String:
MAEPRQEFEV MEDHAGTYGL GDRKDQGGYT MHQDQEGDTD AGLKESPLQT PTEDGSEEPG SETSDAKSTP TAEDVTAPLV DEGAPGKQA AAQPHTEIPE GTTAEEAGIG DTPSLEDEAA GHVTQARMVS KSKDGTGSDD KKAKGADGKT KIATPRGAAP P GQKGQANA TRIPAKTPPA PKTPPSSGEP PKSGDRSGYS SPGSPGTPGS RSRTPSLPTP PTREPKKVAV VRTPPKSPSS AK SRLQTAP VPMPDLKNVK SKIGSTENLK HQPGGGKVQI INKKLDLSNV QSKCGSKDNI KHVPGGGSVQ IVYKPVDLSK VTS KCGSLG NIHHKPGGGQ VEVKSEKLDF KDRVQSKIGS LDNITHVPGG GNKKIETHKL TFRENAKAKT DHGAEIVYKS PVVS GDTSP RHLSNVSSTG SIDMVDSPQL ATLADEVSAS LAKQGL

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Experimental details

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Structure determination

Methodcryo EM
Processinghelical reconstruction
Aggregation statefilament

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Sample preparation

BufferpH: 7.4
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELDBright-field microscopy
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number real images: 2004 / Average electron dose: 1.07 e/Å2
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final angle assignmentType: NOT APPLICABLE
Final reconstructionApplied symmetry - Helical parameters - Δz: 4.85 Å
Applied symmetry - Helical parameters - Δ&Phi: -1.23 °
Applied symmetry - Helical parameters - Axial symmetry: C1 (asymmetric)
Resolution.type: BY AUTHOR / Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 60
FSC plot (resolution estimation)

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