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- EMDB-17167: unseeded Abeta(1-40) amyloid fibril (morphology ii) -

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Basic information

Entry
Database: EMDB / ID: EMD-17167
Titleunseeded Abeta(1-40) amyloid fibril (morphology ii)
Map data
Sample
  • Complex: in vitro Abeta(1-40) amyloid fibril
    • Protein or peptide: Amyloid-beta A4 protein
KeywordsAmyloid fibril / Amyloid-beta / PROTEIN FIBRIL
Function / homology
Function and homology information


signaling receptor activator activity / Golgi-associated vesicle / clathrin-coated pit / axonogenesis / central nervous system development / heparin binding / growth cone / perikaryon / early endosome / membrane raft ...signaling receptor activator activity / Golgi-associated vesicle / clathrin-coated pit / axonogenesis / central nervous system development / heparin binding / growth cone / perikaryon / early endosome / membrane raft / signaling receptor binding / Golgi apparatus / cell surface / endoplasmic reticulum / extracellular region / nucleus / plasma membrane
Similarity search - Function
Amyloidogenic glycoprotein, amyloid-beta peptide superfamily / Beta-amyloid peptide (beta-APP) / Amyloidogenic glycoprotein, amyloid-beta peptide / Beta-amyloid precursor protein C-terminal / Amyloidogenic glycoprotein, intracellular domain, conserved site / Beta-amyloid precursor protein C-terminus / Amyloid precursor protein (APP) intracellular domain signature. / Amyloidogenic glycoprotein, extracellular / Amyloidogenic glycoprotein, heparin-binding / Amyloidogenic glycoprotein, E2 domain ...Amyloidogenic glycoprotein, amyloid-beta peptide superfamily / Beta-amyloid peptide (beta-APP) / Amyloidogenic glycoprotein, amyloid-beta peptide / Beta-amyloid precursor protein C-terminal / Amyloidogenic glycoprotein, intracellular domain, conserved site / Beta-amyloid precursor protein C-terminus / Amyloid precursor protein (APP) intracellular domain signature. / Amyloidogenic glycoprotein, extracellular / Amyloidogenic glycoprotein, heparin-binding / Amyloidogenic glycoprotein, E2 domain / E2 domain superfamily / Amyloidogenic glycoprotein, heparin-binding domain superfamily / Amyloid A4 N-terminal heparin-binding / E2 domain of amyloid precursor protein / Amyloid precursor protein (APP) E1 domain profile. / Amyloid precursor protein (APP) E2 domain profile. / amyloid A4 / Amyloidogenic glycoprotein / PH-like domain superfamily
Similarity search - Domain/homology
Amyloid-beta A4 protein
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodhelical reconstruction / cryo EM / Resolution: 2.73 Å
AuthorsPfeiffer PB / Schmidt M / Faendrich M
Funding support Germany, 1 items
OrganizationGrant numberCountry
German Research Foundation (DFG)FA 456/24-1 Germany
CitationJournal: J Mol Biol / Year: 2024
Title: Cryo-EM Analysis of the Effect of Seeding with Brain-derived Aβ Amyloid Fibrils.
Authors: Peter Benedikt Pfeiffer / Marijana Ugrina / Nadine Schwierz / Christina J Sigurdson / Matthias Schmidt / Marcus Fändrich /
Abstract: Aβ amyloid fibrils from Alzheimer's brain tissue are polymorphic and structurally different from typical in vitro formed Aβ fibrils. Here, we show that brain-derived (ex vivo) fibril structures can ...Aβ amyloid fibrils from Alzheimer's brain tissue are polymorphic and structurally different from typical in vitro formed Aβ fibrils. Here, we show that brain-derived (ex vivo) fibril structures can be proliferated by seeding in vitro. The proliferation reaction is only efficient for one of the three abundant ex vivo Aβ fibril morphologies, which consists of two peptide stacks, while the inefficiently proliferated fibril morphologies contain four or six peptide stacks. In addition to the seeded fibril structures, we find that de novo nucleated fibril structures can emerge in seeded samples if the seeding reaction is continued over multiple generations. These data imply a competition between de novo nucleation and seed extension and suggest further that seeding favours the outgrowth of fibril morphologies that contain fewer peptide stacks.
History
DepositionApr 20, 2023-
Header (metadata) releaseFeb 7, 2024-
Map releaseFeb 7, 2024-
UpdateFeb 7, 2024-
Current statusFeb 7, 2024Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_17167.png

Downloads & links

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Map

FileDownload / File: emd_17167.map.gz / Format: CCP4 / Size: 52.7 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.93 Å/pix.
x 240 pix.
= 224.16 Å		0.93 Å/pix.
x 240 pix.
= 224.16 Å		0.93 Å/pix.
x 240 pix.
= 224.16 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.934 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.014
Minimum - Maximum-0.025314257 - 0.05080491
Average (Standard dev.)0.00007884646 (±0.0012861859)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions240240240
Spacing240240240
CellA=B=C: 224.16 Å
α=β=γ: 90.0 °

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Supplemental data

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Mask #1

Fileemd_17167_msk_1.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_17167_half_map_1.map
Projections & Slices
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Density Histograms

Histogram

Histogram (log scale)

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Half map: #2

Fileemd_17167_half_map_2.map
Projections & Slices
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Histogram (log scale)

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Sample components

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Entire : in vitro Abeta(1-40) amyloid fibril

EntireName: in vitro Abeta(1-40) amyloid fibril
Components
  • Complex: in vitro Abeta(1-40) amyloid fibril
    • Protein or peptide: Amyloid-beta A4 protein

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Supramolecule #1: in vitro Abeta(1-40) amyloid fibril

SupramoleculeName: in vitro Abeta(1-40) amyloid fibril / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all / Details: morphology ii
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Amyloid-beta A4 protein

MacromoleculeName: Amyloid-beta A4 protein / type: protein_or_peptide / ID: 1 / Number of copies: 12 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 4.335852 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
DAEFRHDSGY EVHHQKLVFF AEDVGSNKGA IIGLMVGGVV

UniProtKB: Amyloid-beta A4 protein

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Experimental details

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Structure determination

Methodcryo EM
Processinghelical reconstruction
Aggregation statehelical array

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Sample preparation

Concentration0.005 mg/mL
BufferpH: 7.4 / Component - Concentration: 100.0 mM / Component - Formula: Na2HPO4 / Component - Name: Disodium phosphate
GridModel: C-flat-1.2/1.3 / Material: COPPER / Mesh: 400 / Support film - Material: CARBON / Support film - topology: HOLEY / Pretreatment - Type: GLOW DISCHARGE / Pretreatment - Time: 40 sec.
VitrificationCryogen name: ETHANE / Chamber humidity: 95 % / Instrument: LEICA PLUNGER

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: FEI FALCON IV (4k x 4k) / Number grids imaged: 1 / Number real images: 4628 / Average exposure time: 2.9 sec. / 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 / Cs: 2.7 mm / Nominal defocus max: 2.1 µm / Nominal defocus min: 0.6 µm / Nominal magnification: 130000
Sample stageCooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionApplied symmetry - Helical parameters - Δz: 2.372 Å
Applied symmetry - Helical parameters - Δ&Phi: 179.526 °
Applied symmetry - Helical parameters - Axial symmetry: C1 (asymmetric)
Resolution.type: BY AUTHOR / Resolution: 2.73 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION (ver. 3.1.3) / Number images used: 40968
Segment selectionNumber selected: 41423 / Software - Name: RELION (ver. 3.1.3)
Startup modelType of model: NONE
Final angle assignmentType: NOT APPLICABLE
FSC plot (resolution estimation)

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Atomic model buiding 1

RefinementSpace: REAL / Protocol: BACKBONE TRACE / Target criteria: correlation coefficient
Output model

PDB-8ot3:
unseeded Abeta(1-40) amyloid fibril (morphology ii)

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