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- EMDB-42294: Structure of recombinantly assembled murine alpha-synuclein fibrils -

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Basic information

Entry
Database: EMDB / ID: EMD-42294
TitleStructure of recombinantly assembled murine alpha-synuclein fibrils
Map data
Sample
  • Complex: alpha-synuclein
    • Protein or peptide: Alpha-synuclein
Keywordssynuclein / Parkinson's disease / neurodegeneration / amyloid / fibril / PROTEIN FIBRIL
Function / homology
Function and homology information


PKR-mediated signaling / regulation of neurotransmitter secretion / platelet alpha granule membrane / membrane organization / synaptic transmission, dopaminergic / neurotransmitter secretion / neutral lipid metabolic process / regulation of acyl-CoA biosynthetic process / negative regulation of dopamine uptake involved in synaptic transmission / negative regulation of norepinephrine uptake ...PKR-mediated signaling / regulation of neurotransmitter secretion / platelet alpha granule membrane / membrane organization / synaptic transmission, dopaminergic / neurotransmitter secretion / neutral lipid metabolic process / regulation of acyl-CoA biosynthetic process / negative regulation of dopamine uptake involved in synaptic transmission / negative regulation of norepinephrine uptake / response to desipramine / positive regulation of SNARE complex assembly / positive regulation of hydrogen peroxide catabolic process / supramolecular fiber / negative regulation of chaperone-mediated autophagy / mitochondrial membrane organization / arachidonate binding / regulation of reactive oxygen species metabolic process / negative regulation of platelet-derived growth factor receptor signaling pathway / positive regulation of protein localization to cell periphery / negative regulation of exocytosis / regulation of glutamate secretion / dopamine biosynthetic process / response to iron(II) ion / SNARE complex assembly / positive regulation of neurotransmitter secretion / negative regulation of dopamine metabolic process / regulation of macrophage activation / positive regulation of inositol phosphate biosynthetic process / negative regulation of microtubule polymerization / regulation of locomotion / synaptic vesicle transport / transporter regulator activity / synaptic vesicle priming / dopamine metabolic process / regulation of dopamine secretion / protein complex oligomerization / mitochondrial ATP synthesis coupled electron transport / dynein complex binding / negative regulation of thrombin-activated receptor signaling pathway / positive regulation of receptor recycling / cuprous ion binding / nuclear outer membrane / response to magnesium ion / positive regulation of exocytosis / positive regulation of endocytosis / regulation of neuronal synaptic plasticity / kinesin binding / synaptic vesicle endocytosis / cysteine-type endopeptidase inhibitor activity / positive regulation of synaptic transmission / regulation of presynapse assembly / response to type II interferon / negative regulation of serotonin uptake / alpha-tubulin binding / beta-tubulin binding / phospholipase binding / behavioral response to cocaine / phospholipid metabolic process / cellular response to fibroblast growth factor stimulus / inclusion body / axon terminus / Hsp70 protein binding / response to interleukin-1 / regulation of microtubule cytoskeleton organization / cellular response to copper ion / positive regulation of release of sequestered calcium ion into cytosol / adult locomotory behavior / SNARE binding / excitatory postsynaptic potential / protein tetramerization / phosphoprotein binding / microglial cell activation / ferrous iron binding / fatty acid metabolic process / regulation of long-term neuronal synaptic plasticity / synapse organization / protein destabilization / phospholipid binding / receptor internalization / tau protein binding / long-term synaptic potentiation / terminal bouton / positive regulation of inflammatory response / synaptic vesicle membrane / actin cytoskeleton / growth cone / actin binding / cellular response to oxidative stress / neuron apoptotic process / cell cortex / histone binding / response to lipopolysaccharide / microtubule binding / chemical synaptic transmission / negative regulation of neuron apoptotic process / mitochondrial outer membrane / cytoskeleton / oxidoreductase activity / postsynapse
Similarity search - Function
Synuclein / Alpha-synuclein / Synuclein
Similarity search - Domain/homology
Biological speciesMus musculus (house mouse)
Methodhelical reconstruction / cryo EM / Resolution: 3.1 Å
AuthorsZhou Y / Sokratian A
Funding support United States, 1 items
OrganizationGrant numberCountry
Michael J. Fox FoundationASAP-020527 United States
CitationJournal: Sci Adv / Year: 2024
Title: Mouse α-synuclein fibrils are structurally and functionally distinct from human fibrils associated with Lewy body diseases.
Authors: Arpine Sokratian / Ye Zhou / Meltem Tatli / Kevin J Burbidge / Enquan Xu / Elizabeth Viverette / Sonia Donzelli / Addison M Duda / Yuan Yuan / Huizhong Li / Samuel Strader / Nirali Patel / ...Authors: Arpine Sokratian / Ye Zhou / Meltem Tatli / Kevin J Burbidge / Enquan Xu / Elizabeth Viverette / Sonia Donzelli / Addison M Duda / Yuan Yuan / Huizhong Li / Samuel Strader / Nirali Patel / Lauren Shiell / Tuyana Malankhanova / Olivia Chen / Joseph R Mazzulli / Lalith Perera / Henning Stahlberg / Mario Borgnia / Alberto Bartesaghi / Hilal A Lashuel / Andrew B West /
Abstract: The intricate process of α-synuclein aggregation and fibrillization holds pivotal roles in Parkinson's disease (PD) and multiple system atrophy (MSA). While mouse α-synuclein can fibrillize in ...The intricate process of α-synuclein aggregation and fibrillization holds pivotal roles in Parkinson's disease (PD) and multiple system atrophy (MSA). While mouse α-synuclein can fibrillize in vitro, whether these fibrils commonly used in research to induce this process or form can reproduce structures in the human brain remains unknown. Here, we report the first atomic structure of mouse α-synuclein fibrils, which was solved in parallel by two independent teams. The structure shows striking similarity to MSA-amplified and PD-associated E46K fibrils. However, mouse α-synuclein fibrils display altered packing arrangements, reduced hydrophobicity, and heightened fragmentation sensitivity and evoke only weak immunological responses. Furthermore, mouse α-synuclein fibrils exhibit exacerbated pathological spread in neurons and humanized α-synuclein mice. These findings provide critical insights into the structural underpinnings of α-synuclein pathogenicity and emphasize a need to reassess the role of mouse α-synuclein fibrils in the development of related diagnostic probes and therapeutic interventions.
History
DepositionOct 10, 2023-
Header (metadata) releaseOct 9, 2024-
Map releaseOct 9, 2024-
UpdateMay 28, 2025-
Current statusMay 28, 2025Processing site: RCSB / Status: Released

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Structure visualization

Supplemental images

emd_42294.png

Downloads & links

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Map

FileDownload / File: emd_42294.map.gz / Format: CCP4 / Size: 8 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

Size
Brightness
Contrast
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AxesZ (Sec.)Y (Row.)X (Col.)
1.08 Å/pix.
x 128 pix.
= 138.24 Å		1.08 Å/pix.
x 128 pix.
= 138.24 Å		1.08 Å/pix.
x 128 pix.
= 138.24 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 1.08 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0146
Minimum - Maximum-0.053710554 - 0.08037511
Average (Standard dev.)0.00011187801 (±0.0037834584)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions128128128
Spacing128128128
CellA=B=C: 138.24 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_42294_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_42294_half_map_2.map
Projections & Slices
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Histogram

Histogram (log scale)

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Sample components

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Entire : alpha-synuclein

EntireName: alpha-synuclein
Components
  • Complex: alpha-synuclein
    • Protein or peptide: Alpha-synuclein

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Supramolecule #1: alpha-synuclein

SupramoleculeName: alpha-synuclein / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all
Source (natural)Organism: Mus musculus (house mouse)

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Macromolecule #1: Alpha-synuclein

MacromoleculeName: Alpha-synuclein / type: protein_or_peptide / ID: 1 / Number of copies: 12 / Enantiomer: LEVO
Source (natural)Organism: Mus musculus (house mouse)
Molecular weightTheoretical: 14.501185 KDa
Recombinant expressionOrganism: Escherichia coli BL21(DE3) (bacteria)
SequenceString:
MDVFMKGLSK AKEGVVAAAE KTKQGVAEAA GKTKEGVLYV GSKTKEGVVH GVTTVAEKTK EQVTNVGGAV VTGVTAVAQK TVEGAGNIA AATGFVKKDQ MGKGEEGYPQ EGILEDMPVD PGSEAYEMPS EEGYQDYEPE A

UniProtKB: Alpha-synuclein

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Experimental details

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Structure determination

Methodcryo EM
Processinghelical reconstruction
Aggregation statefilament

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Sample preparation

Concentration0.2 mg/mL
BufferpH: 7.4
Component:
ConcentrationFormulaName
137.0 mMNaClSodium Chloride
2.7 mMKClPotassium Chloride
10.0 mMNa2HPO4Sodium Phosphate Dibasic
1.8 mMKH2PO4Potassium Phosphate Monobasic

Details: Phosphate-buffered saline (PBS)
GridModel: Quantifoil R1.2/1.3 / Material: GOLD / Mesh: 300 / Support film - Material: GOLD / Support film - topology: HOLEY ARRAY / Support film - Film thickness: 50 / Pretreatment - Type: PLASMA CLEANING / Pretreatment - Time: 75 sec.
VitrificationCryogen name: ETHANE / Chamber humidity: 90 % / Chamber temperature: 293.15 K / Instrument: LEICA EM GP

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 2 / Average electron dose: 60.0 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
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: 4.84 Å
Applied symmetry - Helical parameters - Δ&Phi: -0.84 °
Applied symmetry - Helical parameters - Axial symmetry: C1 (asymmetric)
Algorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 3.1 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 27523
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: INSILICO MODEL
Final angle assignmentType: NOT APPLICABLE
FSC plot (resolution estimation)

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