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- EMDB-18281: Tau - CTE-LIA4 (tau intermediate amyloid) -

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Basic information

Entry
Database: EMDB / ID: EMD-18281
TitleTau - CTE-LIA4 (tau intermediate amyloid)
Map dataSharpened map
Sample
  • Complex: Amyloid
    • Protein or peptide: Isoform Tau-D of Microtubule-associated protein tau
KeywordsAmyloid / tau / PROTEIN FIBRIL
Function / homology
Function and homology information


plus-end-directed organelle transport along microtubule / histone-dependent DNA binding / neurofibrillary tangle assembly / positive regulation of diacylglycerol kinase activity / axonal transport / negative regulation of establishment of protein localization to mitochondrion / neurofibrillary tangle / positive regulation of protein localization to synapse / microtubule lateral binding / tubulin complex ...plus-end-directed organelle transport along microtubule / histone-dependent DNA binding / neurofibrillary tangle assembly / positive regulation of diacylglycerol kinase activity / axonal transport / negative regulation of establishment of protein localization to mitochondrion / neurofibrillary tangle / positive regulation of protein localization to synapse / microtubule lateral binding / tubulin complex / phosphatidylinositol bisphosphate binding / main axon / negative regulation of kinase activity / regulation of long-term synaptic depression / negative regulation of tubulin deacetylation / generation of neurons / rRNA metabolic process / internal protein amino acid acetylation / regulation of chromosome organization / regulation of mitochondrial fission / axonal transport of mitochondrion / intracellular distribution of mitochondria / axon development / central nervous system neuron development / regulation of microtubule polymerization / apolipoprotein binding / microtubule polymerization / lipoprotein particle binding / minor groove of adenine-thymine-rich DNA binding / dynactin binding / negative regulation of mitochondrial membrane potential / glial cell projection / protein polymerization / axolemma / negative regulation of mitochondrial fission / regulation of microtubule polymerization or depolymerization / Caspase-mediated cleavage of cytoskeletal proteins / positive regulation of axon extension / regulation of microtubule cytoskeleton organization / Activation of AMPK downstream of NMDARs / regulation of cellular response to heat / cytoplasmic microtubule organization / positive regulation of protein localization / supramolecular fiber organization / stress granule assembly / regulation of calcium-mediated signaling / axon cytoplasm / somatodendritic compartment / positive regulation of microtubule polymerization / synapse assembly / cellular response to brain-derived neurotrophic factor stimulus / nuclear periphery / phosphatidylinositol binding / cellular response to nerve growth factor stimulus / positive regulation of superoxide anion generation / protein phosphatase 2A binding / regulation of autophagy / astrocyte activation / response to lead ion / microglial cell activation / synapse organization / Hsp90 protein binding / protein homooligomerization / PKR-mediated signaling / regulation of synaptic plasticity / : / memory / SH3 domain binding / microtubule cytoskeleton organization / cytoplasmic ribonucleoprotein granule / cellular response to reactive oxygen species / microtubule cytoskeleton / neuron projection development / cell-cell signaling / protein-folding chaperone binding / single-stranded DNA binding / actin binding / cellular response to heat / protein-macromolecule adaptor activity / double-stranded DNA binding / growth cone / cell body / microtubule binding / sequence-specific DNA binding / microtubule / amyloid fibril formation / dendritic spine / learning or memory / nuclear speck / neuron projection / membrane raft / axon / negative regulation of gene expression / neuronal cell body / DNA damage response / dendrite / protein kinase binding / enzyme binding / mitochondrion / DNA binding
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)
Methodhelical reconstruction / cryo EM / Resolution: 2.18 Å
AuthorsLovestam S / Li D / Scheres SHW / Goedert M
Funding support United Kingdom, 1 items
OrganizationGrant numberCountry
Medical Research Council (MRC, United Kingdom) United Kingdom
CitationJournal: Nature / Year: 2024
Title: Disease-specific tau filaments assemble via polymorphic intermediates.
Authors: Sofia Lövestam / David Li / Jane L Wagstaff / Abhay Kotecha / Dari Kimanius / Stephen H McLaughlin / Alexey G Murzin / Stefan M V Freund / Michel Goedert / Sjors H W Scheres /
Abstract: Intermediate species in the assembly of amyloid filaments are believed to play a central role in neurodegenerative diseases and may constitute important targets for therapeutic intervention. However, ...Intermediate species in the assembly of amyloid filaments are believed to play a central role in neurodegenerative diseases and may constitute important targets for therapeutic intervention. However, structural information about intermediate species has been scarce and the molecular mechanisms by which amyloids assemble remain largely unknown. Here we use time-resolved cryogenic electron microscopy to study the in vitro assembly of recombinant truncated tau (amino acid residues 297-391) into paired helical filaments of Alzheimer's disease or into filaments of chronic traumatic encephalopathy. We report the formation of a shared first intermediate amyloid filament, with an ordered core comprising residues 302-316. Nuclear magnetic resonance indicates that the same residues adopt rigid, β-strand-like conformations in monomeric tau. At later time points, the first intermediate amyloid disappears and we observe many different intermediate amyloid filaments, with structures that depend on the reaction conditions. At the end of both assembly reactions, most intermediate amyloids disappear and filaments with the same ordered cores as those from human brains remain. Our results provide structural insights into the processes of primary and secondary nucleation of amyloid assembly, with implications for the design of new therapies.
History
DepositionAug 20, 2023-
Header (metadata) releaseSep 20, 2023-
Map releaseSep 20, 2023-
UpdateJan 17, 2024-
Current statusJan 17, 2024Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_18281.png

Downloads & links

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Map

FileDownload / File: emd_18281.map.gz / Format: CCP4 / Size: 216 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationSharpened map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.73 Å/pix.
x 384 pix.
= 279.168 Å		0.73 Å/pix.
x 384 pix.
= 279.168 Å		0.73 Å/pix.
x 384 pix.
= 279.168 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.727 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.00674
Minimum - Maximum-0.015455102 - 0.038082976
Average (Standard dev.)0.00010913996 (±0.0017289688)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions384384384
Spacing384384384
CellA=B=C: 279.168 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Unsharpened map

Fileemd_18281_additional_1.map
AnnotationUnsharpened map
Projections & Slices
AxesZYX

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Slices (1/2)
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Histogram

Histogram (log scale)

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Half map: Half map 1

Fileemd_18281_half_map_1.map
AnnotationHalf map 1
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map 2

Fileemd_18281_half_map_2.map
AnnotationHalf map 2
Projections & Slices
AxesZYX

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Sample components

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Entire : Amyloid

EntireName: Amyloid
Components
  • Complex: Amyloid
    • Protein or peptide: Isoform Tau-D of Microtubule-associated protein tau

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Supramolecule #1: Amyloid

SupramoleculeName: Amyloid / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Homo sapiens (human)

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

MacromoleculeName: Isoform Tau-D of Microtubule-associated protein tau / type: protein_or_peptide / ID: 1 / Number of copies: 6 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 40.002773 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString: MAEPRQEFEV MEDHAGTYGL GDRKDQGGYT MHQDQEGDTD AGLKEEAGIG DTPSLEDEAA GHVTQARMVS KSKDGTGSDD KKAKGADGK TKIATPRGAA PPGQKGQANA TRIPAKTPPA PKTPPSSGEP PKSGDRSGYS SPGSPGTPGS RSRTPSLPTP P TREPKKVA ...String:
MAEPRQEFEV MEDHAGTYGL GDRKDQGGYT MHQDQEGDTD AGLKEEAGIG DTPSLEDEAA GHVTQARMVS KSKDGTGSDD KKAKGADGK TKIATPRGAA PPGQKGQANA TRIPAKTPPA PKTPPSSGEP PKSGDRSGYS SPGSPGTPGS RSRTPSLPTP P TREPKKVA VVRTPPKSPS SAKSRLQTAP VPMPDLKNVK SKIGSTENLK HQPGGGKVQI INKKLDLSNV QSKCGSKDNI KH VPGGGSV QIVYKPVDLS KVTSKCGSLG NIHHKPGGGQ VEVKSEKLDF KDRVQSKIGS LDNITHVPGG GNKKIETHKL TFR ENAKAK TDHGAEIVYK SPVVSGDTSP RHLSNVSSTG SIDMVDSPQL ATLADEVSAS LAKQGL

UniProtKB: Microtubule-associated protein tau

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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: 7.2
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Average electron dose: 40.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.5 µm / Nominal defocus min: 0.5 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionApplied symmetry - Helical parameters - Δz: 2.374 Å
Applied symmetry - Helical parameters - Δ&Phi: 179.389 °
Applied symmetry - Helical parameters - Axial symmetry: C1 (asymmetric)
Resolution.type: BY AUTHOR / Resolution: 2.18 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 4) / Number images used: 48346
Startup modelType of model: OTHER / Details: de novo
Final angle assignmentType: NOT APPLICABLE
FSC plot (resolution estimation)

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