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- EMDB-60262: F0502B-bound WT polymorph 5a alpha-synuclein fibril -

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Basic information

Entry
Database: EMDB / ID: EMD-60262
TitleF0502B-bound WT polymorph 5a alpha-synuclein fibril
Map data
Sample
  • Complex: F0502B-bound WT polymorph 5a alpha-synuclein fibril
    • Protein or peptide: Alpha-synuclein
  • Ligand: 2-bromanyl-4-[(~{E})-2-[6-[2-(2-fluoranylethoxy)ethyl-methyl-amino]-5-methyl-1,3-benzothiazol-2-yl]ethenyl]phenol
Keywordsamyloid fibril / complex / PROTEIN FIBRIL
Function / homology
Function and homology information


regulation of phospholipase activity / negative regulation of monooxygenase activity / negative regulation of mitochondrial electron transport, NADH to ubiquinone / positive regulation of glutathione peroxidase activity / neutral lipid metabolic process / regulation of acyl-CoA biosynthetic process / negative regulation of dopamine uptake involved in synaptic transmission / negative regulation of norepinephrine uptake / positive regulation of SNARE complex assembly / positive regulation of hydrogen peroxide catabolic process ...regulation of phospholipase activity / negative regulation of monooxygenase activity / negative regulation of mitochondrial electron transport, NADH to ubiquinone / positive regulation of glutathione peroxidase activity / neutral lipid metabolic process / regulation of acyl-CoA biosynthetic process / negative regulation of dopamine uptake involved in synaptic transmission / negative regulation of norepinephrine uptake / positive regulation of SNARE complex assembly / positive regulation of hydrogen peroxide catabolic process / supramolecular fiber / negative regulation of transporter activity / mitochondrial membrane organization / negative regulation of chaperone-mediated autophagy / regulation of reactive oxygen species biosynthetic process / regulation of synaptic vesicle recycling / 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 / response to iron(II) ion / regulation of norepinephrine uptake / SNARE complex assembly / positive regulation of neurotransmitter secretion / dopamine biosynthetic process / regulation of locomotion / positive regulation of inositol phosphate biosynthetic process / synaptic vesicle priming / regulation of macrophage activation / negative regulation of microtubule polymerization / synaptic vesicle transport / dynein complex binding / dopamine uptake involved in synaptic transmission / positive regulation of receptor recycling / regulation of dopamine secretion / protein kinase inhibitor activity / negative regulation of thrombin-activated receptor signaling pathway / cuprous ion binding / response to magnesium ion / response to type II interferon / positive regulation of exocytosis / synaptic vesicle exocytosis / positive regulation of endocytosis / kinesin binding / cysteine-type endopeptidase inhibitor activity involved in apoptotic process / mitochondrial ATP synthesis coupled electron transport / synaptic vesicle endocytosis / regulation of presynapse assembly / negative regulation of serotonin uptake / alpha-tubulin binding / phospholipid metabolic process / supramolecular fiber organization / axon terminus / inclusion body / cellular response to copper ion / cellular response to epinephrine stimulus / Hsp70 protein binding / response to interleukin-1 / : / adult locomotory behavior / positive regulation of release of sequestered calcium ion into cytosol / SNARE binding / excitatory postsynaptic potential / fatty acid metabolic process / long-term synaptic potentiation / phosphoprotein binding / protein tetramerization / regulation of transmembrane transporter activity / protein destabilization / negative regulation of protein kinase activity / microglial cell activation / regulation of long-term neuronal synaptic plasticity / synapse organization / ferrous iron binding / positive regulation of protein serine/threonine kinase activity / tau protein binding / PKR-mediated signaling / receptor internalization / : / phospholipid binding / synaptic vesicle membrane / positive regulation of inflammatory response / actin cytoskeleton / positive regulation of peptidyl-serine phosphorylation / actin binding / cell cortex / cellular response to oxidative stress / histone binding / growth cone / chemical synaptic transmission / neuron apoptotic process / negative regulation of neuron apoptotic process / postsynapse / response to lipopolysaccharide / amyloid fibril formation / molecular adaptor activity / lysosome / transcription cis-regulatory region binding / oxidoreductase activity / positive regulation of apoptotic process
Similarity search - Function
Synuclein / Alpha-synuclein / Synuclein
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
Methodhelical reconstruction / cryo EM / Resolution: 2.9 Å
AuthorsLiu KE / Tao YQ / Li D / Liu C
Funding support1 items
OrganizationGrant numberCountry
Not funded
CitationJournal: Proc Natl Acad Sci U S A / Year: 2024
Title: Binding adaptability of chemical ligands to polymorphic α-synuclein amyloid fibrils.
Authors: Kaien Liu / Youqi Tao / Qinyue Zhao / Wencheng Xia / Xiang Li / Shenqing Zhang / Yuxuan Yao / Huaijiang Xiang / Chao Han / Li Tan / Bo Sun / Dan Li / Ang Li / Cong Liu /
Abstract: α-synuclein (α-syn) assembles into structurally distinct fibril polymorphs seen in different synucleinopathies, such as Parkinson's disease and multiple system atrophy. Targeting these unique ...α-synuclein (α-syn) assembles into structurally distinct fibril polymorphs seen in different synucleinopathies, such as Parkinson's disease and multiple system atrophy. Targeting these unique fibril structures using chemical ligands holds diagnostic significance for different disease subtypes. However, the molecular mechanisms governing small molecules interacting with different fibril polymorphs remain unclear. Here, we investigated the interactions of small molecules belonging to four distinct scaffolds, with different α-syn fibril polymorphs. Using cryo-electron microscopy, we determined the structures of these molecules when bound to the fibrils formed by E46K mutant α-syn and compared them to those bound with wild-type α-syn fibrils. Notably, we observed that these ligands exhibit remarkable binding adaptability, as they engage distinct binding sites across different fibril polymorphs. While the molecular scaffold primarily steered the binding locations and geometries on specific sites, the conjugated functional groups further refined this adaptable binding by fine-tuning the geometries and binding sites. Overall, our finding elucidates the adaptability of small molecules binding to different fibril structures, which sheds light on the diagnostic tracer and drug developments tailored to specific pathological fibril polymorphs.
History
DepositionMay 24, 2024-
Header (metadata) releaseSep 11, 2024-
Map releaseSep 11, 2024-
UpdateOct 16, 2024-
Current statusOct 16, 2024Processing site: PDBj / Status: Released

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Structure visualization

Supplemental images

emd_60262.png

Downloads & links

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Map

FileDownload / File: emd_60262.map.gz / Format: CCP4 / Size: 178 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Projections & slices

Image control

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AxesZ (Sec.)Y (Row.)X (Col.)
0.83 Å/pix.
x 360 pix.
= 298.8 Å		0.83 Å/pix.
x 360 pix.
= 298.8 Å		0.83 Å/pix.
x 360 pix.
= 298.8 Å

Surface

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Images are generated by Spider.

Voxel sizeX=Y=Z: 0.83 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.0146
Minimum - Maximum-0.02814452 - 0.063449636
Average (Standard dev.)0.00077890366 (±0.0035330637)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions360360360
Spacing360360360
CellA=B=C: 298.8 Å
α=β=γ: 90.0 °

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Supplemental data

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Half map: #2

Fileemd_60262_half_map_1.map
Projections & Slices
AxesZYX

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Half map: #1

Fileemd_60262_half_map_2.map
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Sample components

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Entire : F0502B-bound WT polymorph 5a alpha-synuclein fibril

EntireName: F0502B-bound WT polymorph 5a alpha-synuclein fibril
Components
  • Complex: F0502B-bound WT polymorph 5a alpha-synuclein fibril
    • Protein or peptide: Alpha-synuclein
  • Ligand: 2-bromanyl-4-[(~{E})-2-[6-[2-(2-fluoranylethoxy)ethyl-methyl-amino]-5-methyl-1,3-benzothiazol-2-yl]ethenyl]phenol

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Supramolecule #1: F0502B-bound WT polymorph 5a alpha-synuclein fibril

SupramoleculeName: F0502B-bound WT polymorph 5a alpha-synuclein fibril / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Homo sapiens (human)

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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: Homo sapiens (human)
Molecular weightTheoretical: 9.804276 KDa
Recombinant expressionOrganism: Escherichia coli (E. coli)
SequenceString:
(ACE)MDVFMKGLS KAKEGVVAAA EKTKQGVAEA AGKTKEGVLY VGSKTKEGVV HGVATVAEKT KEQVTNVGGA VVTGVT AVA QKTVEGAGSI AAATGFVKKD

UniProtKB: Alpha-synuclein

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Macromolecule #2: 2-bromanyl-4-[(~{E})-2-[6-[2-(2-fluoranylethoxy)ethyl-methyl-amin...

MacromoleculeName: 2-bromanyl-4-[(~{E})-2-[6-[2-(2-fluoranylethoxy)ethyl-methyl-amino]-5-methyl-1,3-benzothiazol-2-yl]ethenyl]phenol
type: ligand / ID: 2 / Number of copies: 15 / Formula: 1KI
Molecular weightTheoretical: 465.379 Da
Chemical component information

ChemComp-1KI:
2-bromanyl-4-[(~{E})-2-[6-[2-(2-fluoranylethoxy)ethyl-methyl-amino]-5-methyl-1,3-benzothiazol-2-yl]ethenyl]phenol

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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

BufferpH: 7.5
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K3 BIOQUANTUM (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: 2.0 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: 4.80877 Å
Applied symmetry - Helical parameters - Δ&Phi: -0.778114 °
Applied symmetry - Helical parameters - Axial symmetry: C1 (asymmetric)
Resolution.type: BY AUTHOR / Resolution: 2.9 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 60211
Startup modelType of model: PDB ENTRY
PDB model - PDB ID:

6l4s

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

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