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- PDB-6rtb: cryo-em structure of alpha-synuclein fibril polymorph 2B -

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Basic information

Entry
Database: PDB / ID: 6rtb
Titlecryo-em structure of alpha-synuclein fibril polymorph 2B
ComponentsAlpha-synuclein
KeywordsPROTEIN FIBRIL / amyloid / parkinson
Function / homology
Function and homology information


negative regulation of mitochondrial electron transport, NADH to ubiquinone / neutral lipid metabolic process / regulation of phospholipase activity / negative regulation of monooxygenase activity / regulation of acyl-CoA biosynthetic process / negative regulation of dopamine uptake involved in synaptic transmission / negative regulation of norepinephrine uptake / positive regulation of glutathione peroxidase activity / positive regulation of SNARE complex assembly / positive regulation of hydrogen peroxide catabolic process ...negative regulation of mitochondrial electron transport, NADH to ubiquinone / neutral lipid metabolic process / regulation of phospholipase activity / negative regulation of monooxygenase activity / regulation of acyl-CoA biosynthetic process / negative regulation of dopamine uptake involved in synaptic transmission / negative regulation of norepinephrine uptake / positive regulation of glutathione peroxidase activity / positive regulation of SNARE complex assembly / positive regulation of hydrogen peroxide catabolic process / supramolecular fiber / negative regulation of transporter activity / negative regulation of chaperone-mediated autophagy / mitochondrial membrane organization / regulation of reactive oxygen species biosynthetic process / positive regulation of protein localization to cell periphery / regulation of synaptic vesicle recycling / negative regulation of platelet-derived growth factor receptor signaling pathway / negative regulation of exocytosis / regulation of glutamate secretion / response to iron(II) ion / dopamine biosynthetic process / regulation of norepinephrine uptake / positive regulation of neurotransmitter secretion / SNARE complex assembly / synaptic vesicle priming / dopamine uptake involved in synaptic transmission / regulation of macrophage activation / regulation of locomotion / mitochondrial ATP synthesis coupled electron transport / positive regulation of inositol phosphate biosynthetic process / negative regulation of microtubule polymerization / synaptic vesicle transport / dynein complex binding / positive regulation of receptor recycling / regulation of dopamine secretion / positive regulation of endocytosis / protein kinase inhibitor activity / negative regulation of thrombin-activated receptor signaling pathway / response to type II interferon / cuprous ion binding / synaptic vesicle exocytosis / positive regulation of exocytosis / cysteine-type endopeptidase inhibitor activity involved in apoptotic process / response to magnesium ion / kinesin binding / alpha-tubulin binding / regulation of presynapse assembly / synaptic vesicle endocytosis / negative regulation of serotonin uptake / localization / phospholipid metabolic process / axon terminus / supramolecular fiber organization / inclusion body / cellular response to copper ion / cellular response to epinephrine stimulus / excitatory postsynaptic potential / response to interleukin-1 / adult locomotory behavior / SNARE binding / Hsp70 protein binding / positive regulation of release of sequestered calcium ion into cytosol / fatty acid metabolic process / long-term synaptic potentiation / regulation of transmembrane transporter activity / synapse organization / ferrous iron binding / protein tetramerization / phospholipid binding / phosphoprotein binding / microglial cell activation / regulation of long-term neuronal synaptic plasticity / negative regulation of protein kinase activity / tau protein binding / protein destabilization / PKR-mediated signaling / negative regulation of cysteine-type endopeptidase activity involved in apoptotic process / positive regulation of protein serine/threonine kinase activity / receptor internalization / synaptic vesicle membrane / positive regulation of inflammatory response / activation of cysteine-type endopeptidase activity involved in apoptotic process / actin cytoskeleton / cellular response to oxidative stress / positive regulation of peptidyl-serine phosphorylation / actin binding / cell cortex / growth cone / histone binding / chemical synaptic transmission / postsynapse / neuron apoptotic process / negative regulation of neuron apoptotic process / amyloid fibril formation / response to lipopolysaccharide / lysosome / molecular adaptor activity / oxidoreductase activity / transcription cis-regulatory region binding
Similarity search - Function
Synuclein / Alpha-synuclein / Synuclein
Similarity search - Domain/homology
Biological speciesHomo sapiens (human)
MethodELECTRON MICROSCOPY / helical reconstruction / cryo EM / Resolution: 3.46 Å
AuthorsGuerrero-Ferreira, R. / Taylor, N.M.I. / Arteni, A.A. / Melki, R. / Meier, B.H. / Bockmann, A. / Bousset, L. / Stahlberg, H.
Funding support Switzerland, France, 2items
OrganizationGrant numberCountry
Swiss National Science FoundationCRSII3_154461 Switzerland
European Union116060 France
Citation
Journal: Elife / Year: 2019
Title: Two new polymorphic structures of human full-length alpha-synuclein fibrils solved by cryo-electron microscopy.
Authors: Ricardo Guerrero-Ferreira / Nicholas Mi Taylor / Ana-Andreea Arteni / Pratibha Kumari / Daniel Mona / Philippe Ringler / Markus Britschgi / Matthias E Lauer / Ali Makky / Joeri Verasdonck / ...Authors: Ricardo Guerrero-Ferreira / Nicholas Mi Taylor / Ana-Andreea Arteni / Pratibha Kumari / Daniel Mona / Philippe Ringler / Markus Britschgi / Matthias E Lauer / Ali Makky / Joeri Verasdonck / Roland Riek / Ronald Melki / Beat H Meier / Anja Böckmann / Luc Bousset / Henning Stahlberg /
Abstract: Intracellular inclusions rich in alpha-synuclein are a hallmark of several neuropathological diseases including Parkinson's disease (PD). Previously, we reported the structure of alpha-synuclein ...Intracellular inclusions rich in alpha-synuclein are a hallmark of several neuropathological diseases including Parkinson's disease (PD). Previously, we reported the structure of alpha-synuclein fibrils (residues 1-121), composed of two protofibrils that are connected via a densely-packed interface formed by residues 50-57 (Guerrero-Ferreira, eLife 218;7:e36402). We here report two new polymorphic atomic structures of alpha-synuclein fibrils termed polymorphs 2a and 2b, at 3.0 Å and 3.4 Å resolution, respectively. These polymorphs show a radically different structure compared to previously reported polymorphs. The new structures have a 10 nm fibril diameter and are composed of two protofilaments which interact via intermolecular salt-bridges between amino acids K45, E57 (polymorph 2a) or E46 (polymorph 2b). The non-amyloid component (NAC) region of alpha-synuclein is fully buried by previously non-described interactions with the N-terminus. A hydrophobic cleft, the location of familial PD mutation sites, and the nature of the protofilament interface now invite to formulate hypotheses about fibril formation, growth and stability.
#1: Journal: Biorxiv / Year: 2019
Title: Two new polymorphic structures of alpha-synuclein solved by cryo-electron microscopy
Authors: Guerrero-Ferreira, R. / Taylor, N.M.I. / Arteni, A.A. / Melki, R. / Meier, B.H. / Bockmann, A. / Bousset, L. / Stahlberg, H.
History
DepositionMay 22, 2019Deposition site: PDBE / Processing site: PDBE
Revision 1.0Jun 26, 2019Provider: repository / Type: Initial release
Revision 1.1Dec 18, 2019Group: Database references / Other
Category: atom_sites / cell ...atom_sites / cell / citation / citation_author
Item: _atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] ..._atom_sites.fract_transf_matrix[1][1] / _atom_sites.fract_transf_matrix[2][2] / _atom_sites.fract_transf_matrix[3][3] / _cell.Z_PDB
Revision 1.2Feb 10, 2021Group: Source and taxonomy / Category: em_entity_assembly_naturalsource / Item: _em_entity_assembly_naturalsource.organism

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Structure visualization

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Assembly

Deposited unit
H: Alpha-synuclein
C: Alpha-synuclein
I: Alpha-synuclein
D: Alpha-synuclein
J: Alpha-synuclein
E: Alpha-synuclein
G: Alpha-synuclein
B: Alpha-synuclein
F: Alpha-synuclein
A: Alpha-synuclein


Theoretical massNumber of molelcules
Total (without water)144,76110
Polymers144,76110
Non-polymers00
Water0
1


  • Idetical with deposited unit
  • defined by software
  • Evidence: microscopy
TypeNameSymmetry operationNumber
identity operation1_5551
Buried area42320 Å2
ΔGint-151 kcal/mol
Surface area28530 Å2
MethodPISA

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Components

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


Mass: 14476.108 Da / Num. of mol.: 10
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SNCA, NACP, PARK1 / Production host: Escherichia coli (E. coli) / 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 fibril, polymorph 2B / Type: COMPLEX / Entity ID: all / Source: RECOMBINANT
Molecular weightUnits: KILODALTONS/NANOMETER / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.5
Buffer component
IDConc.NameFormulaBuffer-ID
150 mMTrisHCl1
2150 mMKCl1
SpecimenConc.: 10 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: COPPER / Grid mesh size: 300 divisions/in. / Grid type: Quantifoil R2/1
VitrificationInstrument: FEI VITROBOT MARK II / Cryogen name: ETHANE / Humidity: 80 % / Chamber temperature: 293 K
Details: 3 uL aliquots were applied onto second glow-discharged 300 mesh copper Quantifoil grids R2 1

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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 FIELDBright-field microscopy
Image recordingElectron dose: 69 e/Å2 / Detector mode: COUNTING / Film or detector model: GATAN K2 SUMMIT (4k x 4k)
Image scansMovie frames/image: 50

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Processing

SoftwareName: PHENIX / Version: 1.14_3260: / Classification: refinement
EM software
IDNameVersionCategory
2SerialEMimage acquisition
3FOCUSimage acquisition
5MotionCorr2CTF correction
8Cootmodel fitting
10PHENIXmodel refinement
11RELION2.1initial Euler assignment
12RELION2.1final Euler assignment
13RELION2.1classification
14Coot3D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Helical symmertyAngular rotation/subunit: -0.73 ° / Axial rise/subunit: 4.91 Å / Axial symmetry: C1
Particle selectionNum. of particles selected: 100323
3D reconstructionResolution: 3.46 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 28079 / Symmetry type: HELICAL
Atomic model buildingProtocol: AB INITIO MODEL

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