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- EMDB-65407: The cryo-EM structure of NapIM_type1 amyloid beta 42 fibril. -

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Basic information

Entry
Database: EMDB / ID: EMD-65407
TitleThe cryo-EM structure of NapIM_type1 amyloid beta 42 fibril.
Map data
Sample
  • Tissue: amyloid beta
    • Protein or peptide: Amyloid-beta precursor protein
  • Ligand: ~{N},~{N}-dimethyl-6-[(~{E})-2-(1,3,3-trimethylindol-1-ium-2-yl)ethenyl]naphthalen-2-amine
Keywordsamyloid / PROTEIN FIBRIL
Function / homology
Function and homology information


amyloid-beta complex / growth cone lamellipodium / cellular response to norepinephrine stimulus / collateral sprouting in absence of injury / growth cone filopodium / microglia development / hippocampal neuron apoptotic process / Formyl peptide receptors bind formyl peptides and many other ligands / regulation of Wnt signaling pathway / axo-dendritic transport ...amyloid-beta complex / growth cone lamellipodium / cellular response to norepinephrine stimulus / collateral sprouting in absence of injury / growth cone filopodium / microglia development / hippocampal neuron apoptotic process / Formyl peptide receptors bind formyl peptides and many other ligands / regulation of Wnt signaling pathway / axo-dendritic transport / axon midline choice point recognition / regulation of synapse structure or activity / astrocyte activation involved in immune response / NMDA selective glutamate receptor signaling pathway / regulation of spontaneous synaptic transmission / mating behavior / growth factor receptor binding / peptidase activator activity / Insertion of tail-anchored proteins into the endoplasmic reticulum membrane / positive regulation of amyloid fibril formation / Golgi-associated vesicle / PTB domain binding / astrocyte projection / Lysosome Vesicle Biogenesis / Deregulated CDK5 triggers multiple neurodegenerative pathways in Alzheimer's disease models / neuron remodeling / nuclear envelope lumen / dendrite development / regulation of multicellular organism growth / TRAF6 mediated NF-kB activation / positive regulation of protein metabolic process / signaling receptor activator activity / negative regulation of long-term synaptic potentiation / transition metal ion binding / Advanced glycosylation endproduct receptor signaling / The NLRP3 inflammasome / modulation of excitatory postsynaptic potential / main axon / intracellular copper ion homeostasis / ECM proteoglycans / Notch signaling pathway / response to insulin-like growth factor stimulus / positive regulation of T cell migration / regulation of presynapse assembly / neuronal dense core vesicle / swimming behavior / Purinergic signaling in leishmaniasis infection / positive regulation of calcium-mediated signaling / adult locomotory behavior / positive regulation of mitotic cell cycle / axonogenesis / extracellular matrix organization / cellular response to manganese ion / positive regulation of chemokine production / neuron projection maintenance / clathrin-coated pit / astrocyte activation / Mitochondrial protein degradation / regulation of neuron apoptotic process / ionotropic glutamate receptor signaling pathway / platelet alpha granule lumen / learning / response to interleukin-1 / cellular response to copper ion / positive regulation of glycolytic process / cellular response to cAMP / endosome lumen / trans-Golgi network membrane / positive regulation of interleukin-1 beta production / dendritic shaft / positive regulation of long-term synaptic potentiation / protein serine/threonine kinase binding / locomotory behavior / central nervous system development / Post-translational protein phosphorylation / serine-type endopeptidase inhibitor activity / regulation of long-term neuronal synaptic plasticity / microglial cell activation / cellular response to nerve growth factor stimulus / visual learning / positive regulation of non-canonical NF-kappaB signal transduction / TAK1-dependent IKK and NF-kappa-B activation / synapse organization / positive regulation of interleukin-6 production / recycling endosome / response to lead ion / Golgi lumen / positive regulation of JNK cascade / cognition / Regulation of Insulin-like Growth Factor (IGF) transport and uptake by Insulin-like Growth Factor Binding Proteins (IGFBPs) / cellular response to amyloid-beta / neuron projection development / endocytosis / positive regulation of inflammatory response / calcium ion transport / positive regulation of tumor necrosis factor production / Platelet degranulation / heparin binding / regulation of translation / regulation of gene expression
Similarity search - Function
Amyloidogenic glycoprotein, copper-binding / Amyloidogenic glycoprotein, copper-binding domain conserved site / Amyloidogenic glycoprotein, copper-binding domain superfamily / Copper-binding of amyloid precursor, CuBD / Amyloid precursor protein (APP) copper-binding (CuBD) domain signature. / Amyloidogenic glycoprotein, heparin-binding / Amyloid A4 N-terminal heparin-binding / Amyloidogenic glycoprotein, amyloid-beta peptide superfamily / Beta-amyloid peptide (beta-APP) / Amyloidogenic glycoprotein, amyloid-beta peptide ...Amyloidogenic glycoprotein, copper-binding / Amyloidogenic glycoprotein, copper-binding domain conserved site / Amyloidogenic glycoprotein, copper-binding domain superfamily / Copper-binding of amyloid precursor, CuBD / Amyloid precursor protein (APP) copper-binding (CuBD) domain signature. / Amyloidogenic glycoprotein, heparin-binding / Amyloid A4 N-terminal heparin-binding / 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, E2 domain / E2 domain superfamily / Amyloidogenic glycoprotein, heparin-binding domain superfamily / E2 domain of amyloid precursor protein / Amyloid precursor protein (APP) E1 domain profile. / Amyloid precursor protein (APP) E2 domain profile. / amyloid A4 / Amyloidogenic glycoprotein / Proteinase inhibitor I2, Kunitz, conserved site / Pancreatic trypsin inhibitor (Kunitz) family signature. / BPTI/Kunitz family of serine protease inhibitors. / Pancreatic trypsin inhibitor Kunitz domain / Kunitz/Bovine pancreatic trypsin inhibitor domain / Pancreatic trypsin inhibitor (Kunitz) family profile. / Pancreatic trypsin inhibitor Kunitz domain superfamily / PH-like domain superfamily
Similarity search - Domain/homology
Amyloid-beta precursor protein
Similarity search - Component
Biological speciesHomo sapiens (human)
Methodhelical reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsZhao QY / Cui BY / Liu C
Funding support1 items
OrganizationGrant numberCountry
Not funded
CitationJournal: To Be Published
Title: The cryo-EM structure of NapIM_type1 amyloid beta 42 fibril.
Authors: Zhao QY / Cui BY / Liu C
History
DepositionJul 18, 2025-
Header (metadata) releaseJul 22, 2026-
Map releaseJul 22, 2026-
UpdateJul 22, 2026-
Current statusJul 22, 2026Processing site: PDBc / Status: Released

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Structure visualization

Supplemental images

emd_65407.png

Downloads & links

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Map

FileReleased
Projections & slices

Image control

Size
Brightness
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AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 288 pix.
= 239.04 Å		0.83 Å/pix.
x 288 pix.
= 239.04 Å		0.83 Å/pix.
x 288 pix.
= 239.04 Å

Surface

Projections

Slices (1/3)

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Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.83 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0135
Minimum - Maximum-0.038728464 - 0.06749686
Average (Standard dev.)0.00030725866 (±0.0030614622)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions288288288
Spacing288288288
CellA=B=C: 239.04 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_65407_half_map_1.map
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: #1

Fileemd_65407_half_map_2.map
Projections & Slices
AxesZYX

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Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : amyloid beta

EntireName: amyloid beta
Components
  • Tissue: amyloid beta
    • Protein or peptide: Amyloid-beta precursor protein
  • Ligand: ~{N},~{N}-dimethyl-6-[(~{E})-2-(1,3,3-trimethylindol-1-ium-2-yl)ethenyl]naphthalen-2-amine

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Supramolecule #1: amyloid beta

SupramoleculeName: amyloid beta / type: tissue / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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Macromolecule #1: Amyloid-beta precursor protein

MacromoleculeName: Amyloid-beta precursor protein / type: protein_or_peptide / ID: 1 / Number of copies: 12 / Enantiomer: LEVO
Source (natural)Organism: Homo sapiens (human)
Molecular weightTheoretical: 3.560128 KDa
SequenceString:
GYEVHHQKLV FFAEDVGSNK GAIIGLMVGG VVIA

UniProtKB: Amyloid-beta precursor protein

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Macromolecule #2: ~{N},~{N}-dimethyl-6-[(~{E})-2-(1,3,3-trimethylindol-1-ium-2-yl)e...

MacromoleculeName: ~{N},~{N}-dimethyl-6-[(~{E})-2-(1,3,3-trimethylindol-1-ium-2-yl)ethenyl]naphthalen-2-amine
type: ligand / ID: 2 / Number of copies: 1 / Formula: A1EUE
Molecular weightTheoretical: 355.495 Da

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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: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 BIOCONTINUUM (6k x 4k) / Average electron dose: 55.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Nominal defocus max: 2.4 µm / Nominal defocus min: 1.0 µm
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Final reconstructionApplied symmetry - Helical parameters - Δz: 2.4 Å
Applied symmetry - Helical parameters - Δ&Phi: 178.5 °
Applied symmetry - Helical parameters - Axial symmetry: C1 (asymmetric)
Resolution.type: BY AUTHOR / Resolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number images used: 11491
CTF correctionType: NONE
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

7q4b

Final angle assignmentType: NOT APPLICABLE
FSC plot (resolution estimation)

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