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- PDB-8ohp: Structure of the Fmoc-Tau-PAM4 Type 3 amyloid fibril -

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Basic information

Entry
Database: PDB / ID: 8ohp
TitleStructure of the Fmoc-Tau-PAM4 Type 3 amyloid fibril
ComponentsMicrotubule-associated protein tau
KeywordsPROTEIN FIBRIL / amyloid / tau / helical / cross-beta / fibril / neurodegeneration / Fmoc
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 / tubulin complex / positive regulation of protein localization to synapse / phosphatidylinositol bisphosphate binding / negative regulation of tubulin deacetylation ...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 / tubulin complex / positive regulation of protein localization to synapse / phosphatidylinositol bisphosphate binding / negative regulation of tubulin deacetylation / generation of neurons / rRNA metabolic process / axonal transport of mitochondrion / regulation of chromosome organization / regulation of mitochondrial fission / axon development / central nervous system neuron development / intracellular distribution of mitochondria / minor groove of adenine-thymine-rich DNA binding / lipoprotein particle binding / microtubule polymerization / negative regulation of mitochondrial membrane potential / regulation of microtubule polymerization / dynactin binding / apolipoprotein binding / main axon / protein polymerization / glial cell projection / axolemma / negative regulation of mitochondrial fission / Caspase-mediated cleavage of cytoskeletal proteins / regulation of microtubule polymerization or depolymerization / neurofibrillary tangle assembly / positive regulation of axon extension / Activation of AMPK downstream of NMDARs / regulation of cellular response to heat / positive regulation of superoxide anion generation / supramolecular fiber organization / synapse assembly / regulation of long-term synaptic depression / positive regulation of protein localization / cellular response to brain-derived neurotrophic factor stimulus / regulation of calcium-mediated signaling / cytoplasmic microtubule organization / positive regulation of microtubule polymerization / somatodendritic compartment / axon cytoplasm / astrocyte activation / stress granule assembly / phosphatidylinositol binding / nuclear periphery / regulation of microtubule cytoskeleton organization / protein phosphatase 2A binding / cellular response to reactive oxygen species / Hsp90 protein binding / microglial cell activation / synapse organization / PKR-mediated signaling / cellular response to nerve growth factor stimulus / protein homooligomerization / regulation of synaptic plasticity / SH3 domain binding / response to lead ion / microtubule cytoskeleton organization / memory / cytoplasmic ribonucleoprotein granule / neuron projection development / cell-cell signaling / single-stranded DNA binding / protein-folding chaperone binding / actin binding / cellular response to heat / growth cone / microtubule cytoskeleton / cell body / double-stranded DNA binding / protein-macromolecule adaptor activity / microtubule binding / dendritic spine / sequence-specific DNA binding / amyloid fibril formation / microtubule / 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: 2.7 Å
AuthorsWilkinson, M. / Louros, N. / Tsaka, G. / Ramakers, M. / Morelli, C. / Garcia, T. / Gallardo, R.U. / D'Haeyer, S. / Goossens, V. / Audenaert, D. ...Wilkinson, M. / Louros, N. / Tsaka, G. / Ramakers, M. / Morelli, C. / Garcia, T. / Gallardo, R.U. / D'Haeyer, S. / Goossens, V. / Audenaert, D. / Thal, D.R. / Ranson, N.A. / Radford, S.E. / Rousseau, F. / Schymkowitz, J.
Funding support Belgium, 1items
OrganizationGrant numberCountry
Research Foundation - Flanders (FWO) Belgium
CitationJournal: Nat Commun / Year: 2024
Title: Local structural preferences in shaping tau amyloid polymorphism.
Authors: Nikolaos Louros / Martin Wilkinson / Grigoria Tsaka / Meine Ramakers / Chiara Morelli / Teresa Garcia / Rodrigo Gallardo / Sam D'Haeyer / Vera Goossens / Dominique Audenaert / Dietmar Rudolf ...Authors: Nikolaos Louros / Martin Wilkinson / Grigoria Tsaka / Meine Ramakers / Chiara Morelli / Teresa Garcia / Rodrigo Gallardo / Sam D'Haeyer / Vera Goossens / Dominique Audenaert / Dietmar Rudolf Thal / Ian R Mackenzie / Rosa Rademakers / Neil A Ranson / Sheena E Radford / Frederic Rousseau / Joost Schymkowitz /
Abstract: Tauopathies encompass a group of neurodegenerative disorders characterised by diverse tau amyloid fibril structures. The persistence of polymorphism across tauopathies suggests that distinct ...Tauopathies encompass a group of neurodegenerative disorders characterised by diverse tau amyloid fibril structures. The persistence of polymorphism across tauopathies suggests that distinct pathological conditions dictate the adopted polymorph for each disease. However, the extent to which intrinsic structural tendencies of tau amyloid cores contribute to fibril polymorphism remains uncertain. Using a combination of experimental approaches, we here identify a new amyloidogenic motif, PAM4 (Polymorphic Amyloid Motif of Repeat 4), as a significant contributor to tau polymorphism. Calculation of per-residue contributions to the stability of the fibril cores of different pathologic tau structures suggests that PAM4 plays a central role in preserving structural integrity across amyloid polymorphs. Consistent with this, cryo-EM structural analysis of fibrils formed from a synthetic PAM4 peptide shows that the sequence adopts alternative structures that closely correspond to distinct disease-associated tau strains. Furthermore, in-cell experiments revealed that PAM4 deletion hampers the cellular seeding efficiency of tau aggregates extracted from Alzheimer's disease, corticobasal degeneration, and progressive supranuclear palsy patients, underscoring PAM4's pivotal role in these tauopathies. Together, our results highlight the importance of the intrinsic structural propensity of amyloid core segments to determine the structure of tau in cells, and in propagating amyloid structures in disease.
History
DepositionMar 21, 2023Deposition site: PDBE / Processing site: PDBE
Revision 1.0Feb 21, 2024Provider: repository / Type: Initial release
Revision 2.0Nov 6, 2024Group: Atomic model / Data collection ...Atomic model / Data collection / Database references / Derived calculations / Non-polymer description / Polymer sequence / Source and taxonomy / Structure summary
Category: atom_site / chem_comp ...atom_site / chem_comp / chem_comp_atom / chem_comp_bond / em_admin / em_entity_assembly_naturalsource / entity_poly / entity_poly_seq / pdbx_entity_src_syn / pdbx_entry_details / pdbx_modification_feature / pdbx_poly_seq_scheme / pdbx_struct_mod_residue / struct_conn / struct_ref_seq_dif
Item: _atom_site.Cartn_x / _atom_site.Cartn_y ..._atom_site.Cartn_x / _atom_site.Cartn_y / _atom_site.Cartn_z / _atom_site.auth_atom_id / _atom_site.auth_comp_id / _atom_site.auth_seq_id / _atom_site.group_PDB / _atom_site.label_atom_id / _atom_site.label_comp_id / _atom_site.label_seq_id / _atom_site.type_symbol / _chem_comp.formula / _chem_comp.formula_weight / _chem_comp.id / _chem_comp.mon_nstd_flag / _chem_comp.name / _chem_comp.pdbx_synonyms / _chem_comp.type / _em_admin.last_update / _em_entity_assembly_naturalsource.ncbi_tax_id / _em_entity_assembly_naturalsource.organism / _entity_poly.pdbx_seq_one_letter_code / _entity_poly.pdbx_seq_one_letter_code_can / _pdbx_entity_src_syn.ncbi_taxonomy_id / _pdbx_entity_src_syn.organism_common_name / _pdbx_entity_src_syn.organism_scientific / _pdbx_entity_src_syn.pdbx_end_seq_num / _pdbx_entry_details.has_protein_modification / _struct_conn.pdbx_dist_value / _struct_conn.ptnr1_auth_comp_id / _struct_conn.ptnr1_auth_seq_id / _struct_conn.ptnr1_label_comp_id / _struct_conn.ptnr1_label_seq_id / _struct_conn.ptnr2_auth_comp_id / _struct_conn.ptnr2_auth_seq_id / _struct_conn.ptnr2_label_comp_id / _struct_conn.ptnr2_label_seq_id
Revision 2.1Nov 27, 2024Group: Data collection / Category: em_admin / Item: _em_admin.last_update

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
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
G: Microtubule-associated protein tau
H: Microtubule-associated protein tau
I: Microtubule-associated protein tau
J: Microtubule-associated protein tau
K: Microtubule-associated protein tau
L: Microtubule-associated protein tau
M: Microtubule-associated protein tau
N: Microtubule-associated protein tau
O: Microtubule-associated protein tau
P: Microtubule-associated protein tau
Q: Microtubule-associated protein tau
R: Microtubule-associated protein tau
S: Microtubule-associated protein tau
T: Microtubule-associated protein tau
U: Microtubule-associated protein tau
V: Microtubule-associated protein tau
W: Microtubule-associated protein tau
X: Microtubule-associated protein tau


Theoretical massNumber of molelcules
Total (without water)39,65424
Polymers39,65424
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: assay for oligomerization, ThT fluorescence assay, electron microscopy, Negative stain EM, microscopy, Atomic force microscopy, light scattering, FTIR
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

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


Mass: 1652.269 Da / Num. of mol.: 24 / Source method: obtained synthetically
Details: 13-residue peptide of the PAM4 motif of Tau, corresponding to residues 350-362 of the Tau repeat domain. The peptide is C-terminally amidated and should have been N-terminally acetylated but ...Details: 13-residue peptide of the PAM4 motif of Tau, corresponding to residues 350-362 of the Tau repeat domain. The peptide is C-terminally amidated and should have been N-terminally acetylated but 10% of the peptide (by mass spec) was still adducted to the Fmoc protection group from peptide synthesis. This contaminant species dominated fibril assembly
Source: (synth.) Homo sapiens (human) / References: UniProt: P10636
Has ligand of interestN
Has protein modificationY

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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: Amyloid fibril form 2a of Tau-PAM4 peptide adducted with the Fmoc protection group
Type: COMPLEX / Details: Synthesised peptide assembled into amyloid fibril / Entity ID: all / Source: NATURAL
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Buffer solutionpH: 7
Details: Peptide resuspended in MilliQ water for aggregation reaction
SpecimenConc.: 0.6 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: EMS Lacey Carbon
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 90 % / Chamber temperature: 279 K

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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 magnification: 130000 X / Nominal defocus max: 2400 nm / Nominal defocus min: 1200 nm / Cs: 2.7 mm / C2 aperture diameter: 50 µm / Alignment procedure: COMA FREE
Specimen holderSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER
Image recordingAverage exposure time: 5 sec. / Electron dose: 32 e/Å2 / Film or detector model: FEI FALCON IV (4k x 4k) / Num. of grids imaged: 1 / Num. of real images: 1957
Details: Movies were collected as 1204 EER frames compressed and re-grouped into 35 TIF fractions
EM imaging opticsEnergyfilter name: TFS Selectris / Energyfilter slit width: 10 eV
Image scansWidth: 4096 / Height: 4096

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Processing

EM software
IDNameVersionCategory
1crYOLO1.8particle selection
2EPU3image acquisition
4CTFFIND4.14CTF correction
7Coot0.8.9model fitting
9PHENIX1.17.1:model refinement
10RELION4initial Euler assignment
11RELION4final Euler assignment
12RELION4classification
13RELION43D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Helical symmertyAngular rotation/subunit: -1.05 ° / Axial rise/subunit: 4.8 Å / Axial symmetry: C1
Particle selectionNum. of particles selected: 520390
3D reconstructionResolution: 2.7 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 11319 / Symmetry type: HELICAL
Atomic model buildingB value: 48 / Protocol: AB INITIO MODEL / Space: REAL / Target criteria: Cross-correlation coefficient
Details: Initial model built manually in coot, no starting template
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0072856
ELECTRON MICROSCOPYf_angle_d0.6173888
ELECTRON MICROSCOPYf_dihedral_angle_d10.3241296
ELECTRON MICROSCOPYf_chiral_restr0.05432
ELECTRON MICROSCOPYf_plane_restr0.002480

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