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- PDB-8bgs: Tau Paired Helical Filament from Extracellular Vesicles from Alzh... -

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Basic information

Entry
Database: PDB / ID: 8bgs
TitleTau Paired Helical Filament from Extracellular Vesicles from Alzheimer's disease brain
ComponentsMicrotubule-associated protein tau
KeywordsPROTEIN FIBRIL / AMYLOID
Function / homology
Function and homology information


plus-end-directed organelle transport along microtubule / histone-dependent DNA binding / negative regulation of establishment of protein localization to mitochondrion / neurofibrillary tangle / microtubule lateral binding / axonal transport / positive regulation of protein localization to synapse / main axon / phosphatidylinositol bisphosphate binding / regulation of long-term synaptic depression ...plus-end-directed organelle transport along microtubule / histone-dependent DNA binding / negative regulation of establishment of protein localization to mitochondrion / neurofibrillary tangle / microtubule lateral binding / axonal transport / positive regulation of protein localization to synapse / main axon / phosphatidylinositol bisphosphate binding / regulation of long-term synaptic depression / tubulin complex / negative regulation of tubulin deacetylation / generation of neurons / regulation of chromosome organization / rRNA metabolic process / axonal transport of mitochondrion / regulation of mitochondrial fission / axon development / central nervous system neuron development / intracellular distribution of mitochondria / regulation of microtubule polymerization / microtubule polymerization / lipoprotein particle binding / minor groove of adenine-thymine-rich DNA binding / dynactin binding / negative regulation of mitochondrial membrane potential / apolipoprotein binding / glial cell projection / axolemma / protein polymerization / negative regulation of mitochondrial fission / Caspase-mediated cleavage of cytoskeletal proteins / regulation of microtubule polymerization or depolymerization / positive regulation of axon extension / neurofibrillary tangle assembly / Activation of AMPK downstream of NMDARs / synapse assembly / regulation of cellular response to heat / supramolecular fiber organization / positive regulation of protein localization / regulation of calcium-mediated signaling / somatodendritic compartment / cellular response to brain-derived neurotrophic factor stimulus / cytoplasmic microtubule organization / axon cytoplasm / positive regulation of microtubule polymerization / stress granule assembly / phosphatidylinositol binding / regulation of microtubule cytoskeleton organization / nuclear periphery / protein phosphatase 2A binding / positive regulation of superoxide anion generation / cellular response to reactive oxygen species / astrocyte activation / Hsp90 protein binding / microglial cell activation / cellular response to nerve growth factor stimulus / response to lead ion / synapse organization / PKR-mediated signaling / protein homooligomerization / regulation of synaptic plasticity / SH3 domain binding / memory / microtubule cytoskeleton organization / cytoplasmic ribonucleoprotein granule / neuron projection development / cell-cell signaling / single-stranded DNA binding / protein-folding chaperone binding / actin binding / cellular response to heat / microtubule cytoskeleton / cell body / growth cone / double-stranded DNA binding / microtubule binding / protein-macromolecule adaptor activity / dendritic spine / sequence-specific DNA binding / microtubule / amyloid fibril formation / learning or memory / neuron projection / regulation of autophagy / membrane raft / axon / negative regulation of gene expression / neuronal cell body / dendrite / DNA damage response / protein kinase binding / enzyme binding / mitochondrion / DNA binding / RNA binding / extracellular region / identical protein binding / nucleus / plasma membrane
Similarity search - Function
Microtubule-associated protein Tau / Microtubule associated protein, tubulin-binding repeat / Tau and MAP protein, tubulin-binding repeat / Tau and MAP proteins tubulin-binding repeat signature. / Tau and MAP proteins tubulin-binding repeat profile. / :
Similarity search - Domain/homology
Microtubule-associated protein tau
Similarity search - Component
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 3.16 Å
AuthorsBehr, T.S. / Ryskeldi-Falcon, B.
Funding support United Kingdom, 1items
OrganizationGrant numberCountry
Medical Research Council (MRC, United Kingdom)MC_UP_1201/25 United Kingdom
CitationJournal: bioRxiv / Year: 2023
Title: Tau filaments are tethered within brain extracellular vesicles in Alzheimer's disease.
Authors: S L Fowler / T S Behr / E Turkes / P Maglio Cauhy / M S Foiani / A Schaler / G Crowley / S Bez / E Ficulle / E Tsefou / D P O'Brien / R Fischer / B Geary / P Gaur / C Miller / P D'Acunzo / E ...Authors: S L Fowler / T S Behr / E Turkes / P Maglio Cauhy / M S Foiani / A Schaler / G Crowley / S Bez / E Ficulle / E Tsefou / D P O'Brien / R Fischer / B Geary / P Gaur / C Miller / P D'Acunzo / E Levy / K E Duff / B Ryskeldi-Falcon
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 ...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.
History
DepositionOct 28, 2022Deposition site: PDBE / Processing site: PDBE
Revision 1.0May 24, 2023Provider: repository / Type: Initial release
Revision 1.0May 24, 2023Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0May 24, 2023Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0May 24, 2023Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 24, 2023Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 24, 2023Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0May 24, 2023Data content type: Mask / Data content type: Mask / Provider: repository / Type: Initial release
Revision 1.0May 24, 2023Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.0May 24, 2023Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0May 24, 2023Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 24, 2023Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0May 24, 2023Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0May 24, 2023Data content type: Mask / Data content type: Mask / Provider: repository / Type: Initial release
Revision 1.0May 24, 2023Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release
Revision 1.1Jul 24, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond / em_admin / Item: _em_admin.last_update
Revision 1.2Mar 5, 2025Group: Author supporting evidence / Data collection / Structure summary
Category: em_admin / em_helical_entity / pdbx_entry_details
Item: _em_admin.last_update / _em_helical_entity.angular_rotation_per_subunit
Revision 1.1Mar 5, 2025Data content type: EM metadata / Data content type: EM metadata / EM metadata / Group: Data collection / Experimental summary / Data content type: EM metadata / EM metadata / Category: em_admin / em_helical_entity / Data content type: EM metadata / EM metadata
Item: _em_admin.last_update / _em_helical_entity.angular_rotation_per_subunit

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
r: Microtubule-associated protein tau
A: Microtubule-associated protein tau
B: Microtubule-associated protein tau
C: Microtubule-associated protein tau
D: Microtubule-associated protein tau
E: Microtubule-associated protein tau
F: Microtubule-associated protein tau


Theoretical massNumber of molelcules
Total (without water)321,4397
Polymers321,4397
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Noncrystallographic symmetry (NCS)NCS oper:
IDCodeMatrixVector
1given(1), (1), (1)
2given(-0.99957, 0.029317), (-0.029317, -0.99957), (1)264.80197, 272.68246, -7.062
3given(0.999809, -0.019546), (0.019546, 0.999809), (1)2.65272, -2.60136, -4.708
4given(-0.999952, 0.009774), (-0.009774, -0.999952), (1)267.47998, 270.10715, -2.354
5given(-0.999952, -0.009774), (0.009774, -0.999952), (1)270.10715, 267.47998, 2.354
6given(0.999809, 0.019546), (-0.019546, 0.999809), (1)-2.60136, 2.65272, 4.708
7given(0.999236, 0.039085), (-0.039085, 0.999236), (1)-5.15038, 5.35578, 9.416

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Components

#1: Protein
Microtubule-associated protein tau / Neurofibrillary tangle protein / Paired helical filament-tau / PHF-tau


Mass: 45919.871 Da / Num. of mol.: 7 / Source method: isolated from a natural source / Source: (natural) Homo sapiens (human) / Organ: Brain / Tissue: Brain / References: UniProt: P10636
Has protein modificationN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: FILAMENT / 3D reconstruction method: helical reconstruction

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Sample preparation

ComponentName: Tau Paired Helical Filament / Type: TISSUE
Details: Tau Paired Helical Filament extracted from extracellular vesicles that were isolated from the brain of an individual who had Alzheimer's disease.
Entity ID: all / Source: NATURAL
Source (natural)Organism: Homo sapiens (human) / Cellular location: Extracellular vesicle / Organ: Brain / Organelle: Extracellular vesicle / Tissue: Brain
Buffer solutionpH: 7.4
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationCryogen name: ETHANE

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 2200 nm / Nominal defocus min: 1400 nm
Image recordingElectron dose: 38.7 e/Å2 / Film or detector model: GATAN K2 SUMMIT (4k x 4k)

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Processing

SoftwareName: REFMAC / Version: 5.8.0387 / Classification: refinement
CTF correctionType: NONE
Helical symmertyAngular rotation/subunit: 179.439 ° / Axial rise/subunit: 2.354 Å / Axial symmetry: C1
3D reconstructionResolution: 3.16 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 18041 / Symmetry type: HELICAL
RefinementResolution: 3.16→159.6 Å / Cor.coef. Fo:Fc: 0.812 / SU B: 26.307 / SU ML: 0.424 / ESU R: 0.18
Stereochemistry target values: MAXIMUM LIKELIHOOD WITH PHASES
Details: HYDROGENS HAVE BEEN ADDED IN THE RIDING POSITIONS
RfactorNum. reflection% reflection
Rwork0.47182 --
obs0.47182 41782 100 %
Solvent computationSolvent model: PARAMETERS FOR MASK CACLULATION
Displacement parametersBiso mean: 69.65 Å2
Refinement stepCycle: 1 / Total: 574
Refine LS restraints
Refine-IDTypeDev idealDev ideal targetNumber
ELECTRON MICROSCOPYr_bond_refined_d0.0070.012583
ELECTRON MICROSCOPYr_bond_other_d00.016583
ELECTRON MICROSCOPYr_angle_refined_deg1.591.657780
ELECTRON MICROSCOPYr_angle_other_deg0.6321.6011356
ELECTRON MICROSCOPYr_dihedral_angle_1_deg11.579574
ELECTRON MICROSCOPYr_dihedral_angle_2_deg2.93352
ELECTRON MICROSCOPYr_dihedral_angle_3_deg12.03710116
ELECTRON MICROSCOPYr_dihedral_angle_4_deg
ELECTRON MICROSCOPYr_chiral_restr0.0810.288
ELECTRON MICROSCOPYr_gen_planes_refined0.0060.02653
ELECTRON MICROSCOPYr_gen_planes_other0.0030.02115
ELECTRON MICROSCOPYr_nbd_refined
ELECTRON MICROSCOPYr_nbd_other
ELECTRON MICROSCOPYr_nbtor_refined
ELECTRON MICROSCOPYr_nbtor_other
ELECTRON MICROSCOPYr_xyhbond_nbd_refined
ELECTRON MICROSCOPYr_xyhbond_nbd_other
ELECTRON MICROSCOPYr_metal_ion_refined
ELECTRON MICROSCOPYr_metal_ion_other
ELECTRON MICROSCOPYr_symmetry_vdw_refined
ELECTRON MICROSCOPYr_symmetry_vdw_other
ELECTRON MICROSCOPYr_symmetry_hbond_refined
ELECTRON MICROSCOPYr_symmetry_hbond_other
ELECTRON MICROSCOPYr_symmetry_metal_ion_refined
ELECTRON MICROSCOPYr_symmetry_metal_ion_other
ELECTRON MICROSCOPYr_mcbond_it7.5235.637299
ELECTRON MICROSCOPYr_mcbond_other7.5155.637299
ELECTRON MICROSCOPYr_mcangle_it11.6868.476372
ELECTRON MICROSCOPYr_mcangle_other11.6728.499373
ELECTRON MICROSCOPYr_scbond_it10.3587.763284
ELECTRON MICROSCOPYr_scbond_other10.3427.816285
ELECTRON MICROSCOPYr_scangle_it
ELECTRON MICROSCOPYr_scangle_other17.85710.823409
ELECTRON MICROSCOPYr_long_range_B_refined24.95574.12566
ELECTRON MICROSCOPYr_long_range_B_other24.93374.53567
ELECTRON MICROSCOPYr_rigid_bond_restr
ELECTRON MICROSCOPYr_sphericity_free
ELECTRON MICROSCOPYr_sphericity_bonded
LS refinement shellResolution: 3.162→3.245 Å / Total num. of bins used: 20
RfactorNum. reflection% reflection
Rfree0 0 -
Rwork0.728 3084 -
obs--100 %

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