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- PDB-6l4s: cryo-em structure of alpha-synuclein fiber mutation type E46K -

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Entry
Database: PDB / ID: 6l4s
Titlecryo-em structure of alpha-synuclein fiber mutation type E46K
ComponentsAlpha-synuclein
KeywordsPROTEIN FIBRIL / alpha-syn fiber / Parkinson disease
Function / homology
Function and homology information


negative regulation of mitochondrial electron transport, NADH to ubiquinone / 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 / regulation of synaptic vesicle recycling ...negative regulation of mitochondrial electron transport, NADH to ubiquinone / 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 / regulation of synaptic vesicle recycling / negative regulation of chaperone-mediated autophagy / regulation of reactive oxygen species biosynthetic process / positive regulation of protein localization to cell periphery / mitochondrial membrane organization / negative regulation of exocytosis / regulation of glutamate secretion / dopamine biosynthetic process / response to iron(II) ion / positive regulation of neurotransmitter secretion / regulation of macrophage activation / negative regulation of dopamine metabolic process / negative regulation of platelet-derived growth factor receptor signaling pathway / SNARE complex assembly / negative regulation of thrombin-activated receptor signaling pathway / Lewy body / regulation of locomotion / negative regulation of microtubule polymerization / positive regulation of inositol phosphate biosynthetic process / synaptic vesicle priming / regulation of norepinephrine uptake / transporter regulator activity / protein kinase inhibitor activity / dopamine uptake involved in synaptic transmission / synaptic vesicle transport / regulation of dopamine secretion / positive regulation of receptor recycling / positive regulation of exocytosis / cuprous ion binding / mitochondrial ATP synthesis coupled electron transport / nuclear outer membrane / dynein complex binding / response to magnesium ion / synaptic vesicle exocytosis / positive regulation of endocytosis / negative regulation of serotonin uptake / response to type II interferon / kinesin binding / cysteine-type endopeptidase inhibitor activity / regulation of presynapse assembly / synaptic vesicle endocytosis / alpha-tubulin binding / beta-tubulin binding / phospholipase binding / supramolecular fiber organization / phospholipid metabolic process / behavioral response to cocaine / cellular response to fibroblast growth factor stimulus / inclusion body / cellular response to epinephrine stimulus / Hsp70 protein binding / enzyme inhibitor activity / axon terminus / response to interleukin-1 / cellular response to copper ion / positive regulation of release of sequestered calcium ion into cytosol / regulation of microtubule cytoskeleton organization / SNARE binding / adult locomotory behavior / glutathione metabolic process / protein tetramerization / excitatory postsynaptic potential / protein sequestering activity / tubulin binding / phosphoprotein binding / microglial cell activation / ferrous iron binding / fatty acid metabolic process / PKR-mediated signaling / receptor internalization / regulation of long-term neuronal synaptic plasticity / synapse organization / phospholipid binding / protein destabilization / tau protein binding / enzyme activator activity / terminal bouton / positive regulation of inflammatory response / long-term synaptic potentiation / 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 / amyloid fibril formation / chemical synaptic transmission
Similarity search - Function
Synuclein / Alpha-synuclein / Synuclein
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 3.37 Å
AuthorsLi, Y.W. / Zhao, K. / Liu, C. / Li, X.
CitationJournal: Nat Commun / Year: 2020
Title: Parkinson's disease associated mutation E46K of α-synuclein triggers the formation of a distinct fibril structure.
Authors: Kun Zhao / Yaowang Li / Zhenying Liu / Houfang Long / Chunyu Zhao / Feng Luo / Yunpeng Sun / Youqi Tao / Xiao-Dong Su / Dan Li / Xueming Li / Cong Liu /
Abstract: Amyloid aggregation of α-synuclein (α-syn) is closely associated with Parkinson's disease (PD) and other synucleinopathies. Several single amino-acid mutations (e.g. E46K) of α-syn have been ...Amyloid aggregation of α-synuclein (α-syn) is closely associated with Parkinson's disease (PD) and other synucleinopathies. Several single amino-acid mutations (e.g. E46K) of α-syn have been identified causative to the early onset of familial PD. Here, we report the cryo-EM structure of an α-syn fibril formed by N-terminally acetylated E46K mutant α-syn (Ac-E46K). The fibril structure represents a distinct fold of α-syn, which demonstrates that the E46K mutation breaks the electrostatic interactions in the wild type (WT) α-syn fibril and thus triggers the rearrangement of the overall structure. Furthermore, we show that the Ac-E46K fibril is less resistant to harsh conditions and protease cleavage, and more prone to be fragmented with an enhanced seeding capability than that of the WT fibril. Our work provides a structural view to the severe pathology of the PD familial mutation E46K of α-syn and highlights the importance of electrostatic interactions in defining the fibril polymorphs.
History
DepositionOct 21, 2019Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Apr 29, 2020Provider: repository / Type: Initial release
Revision 1.1Nov 10, 2021Group: Database references / Category: citation / citation_author / database_2
Item: _citation.country / _citation.journal_abbrev ..._citation.country / _citation.journal_abbrev / _citation.journal_id_CSD / _citation.journal_id_ISSN / _citation.journal_volume / _citation.page_first / _citation.page_last / _citation.pdbx_database_id_DOI / _citation.pdbx_database_id_PubMed / _citation.title / _citation.year / _database_2.pdbx_DOI / _database_2.pdbx_database_accession
Revision 1.2May 29, 2024Group: Data collection / Category: chem_comp_atom / chem_comp_bond

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Structure visualization

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Assembly

Deposited unit
A: Alpha-synuclein
B: Alpha-synuclein
C: Alpha-synuclein
D: Alpha-synuclein
E: Alpha-synuclein
F: Alpha-synuclein


Theoretical massNumber of molelcules
Total (without water)32,4136
Polymers32,4136
Non-polymers00
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area20230 Å2
ΔGint-86 kcal/mol
Surface area15550 Å2

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Components

#1: Protein
Alpha-synuclein / Non-A beta component of AD amyloid / Non-A4 component of amyloid precursor / NACP


Mass: 5402.157 Da / Num. of mol.: 6 / Mutation: E46K
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SNCA, NACP, PARK1 / Production host: Escherichia coli K-12 (bacteria) / Strain (production host): K-12 / References: UniProt: P37840

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: FILAMENT / 3D reconstruction method: helical reconstruction

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Sample preparation

ComponentName: alpha-synuclein fiber mutation type E46K / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli K-12 (bacteria) / Strain: K-12
Buffer solutionpH: 7.5
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 289 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: FEI TITAN KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD
Image recordingAverage exposure time: 8 sec. / Electron dose: 50 e/Å2 / Detector mode: SUPER-RESOLUTION / Film or detector model: GATAN K2 SUMMIT (4k x 4k)
Image scansMovie frames/image: 32 / Used frames/image: 1-32

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Processing

EM software
IDNameVersionCategory
4CTFFIND4CTF correction
12RELION3classification
13RELION33D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Helical symmertyAngular rotation/subunit: 179.371 ° / Axial rise/subunit: 2.376 Å / Axial symmetry: C1
3D reconstructionResolution: 3.37 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 18009 / Symmetry type: HELICAL

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