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- EMDB-23270: Cryo-EM structure of the N-terminal alpha-synuclein truncation 41-140 -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-23270 | |||||||||
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Title | Cryo-EM structure of the N-terminal alpha-synuclein truncation 41-140 | |||||||||
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![]() | N-terminal alpha-synuclein truncation / PROTEIN FIBRIL | |||||||||
Function / homology | ![]() 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 / mitochondrial membrane organization / negative regulation of chaperone-mediated autophagy / 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 / 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 / dopamine uptake involved in synaptic transmission / dynein complex binding / regulation of dopamine secretion / positive regulation of receptor recycling / protein kinase inhibitor activity / negative regulation of thrombin-activated receptor signaling pathway / response to type II interferon / cuprous ion binding / positive regulation of exocytosis / synaptic vesicle exocytosis / positive regulation of endocytosis / kinesin binding / cysteine-type endopeptidase inhibitor activity involved in apoptotic process / response to magnesium ion / synaptic vesicle endocytosis / regulation of presynapse assembly / negative regulation of serotonin uptake / alpha-tubulin binding / phospholipid metabolic process / supramolecular fiber organization / axon terminus / mitochondrial ATP synthesis coupled electron transport / inclusion body / fatty acid metabolic process / cellular response to copper ion / cellular response to epinephrine stimulus / Hsp70 protein binding / response to interleukin-1 / adult locomotory behavior / negative regulation of cysteine-type endopeptidase activity involved in apoptotic process / positive regulation of release of sequestered calcium ion into cytosol / SNARE binding / excitatory postsynaptic potential / long-term synaptic potentiation / phosphoprotein binding / protein tetramerization / regulation of transmembrane transporter activity / synapse organization / microglial cell activation / negative regulation of protein kinase activity / regulation of long-term neuronal synaptic plasticity / protein destabilization / ferrous iron binding / tau protein binding / positive regulation of protein serine/threonine kinase activity / PKR-mediated signaling / receptor internalization / phospholipid binding / activation of cysteine-type endopeptidase activity involved in apoptotic process / synaptic vesicle membrane / positive regulation of inflammatory response / positive regulation of peptidyl-serine phosphorylation / actin cytoskeleton / actin binding / cellular response to oxidative stress / histone binding / cell cortex / growth cone / chemical synaptic transmission / neuron apoptotic process / negative regulation of neuron apoptotic process / transcription cis-regulatory region binding / postsynapse / amyloid fibril formation / response to lipopolysaccharide / molecular adaptor activity / oxidoreductase activity / lysosome / response to xenobiotic stimulus Similarity search - Function | |||||||||
Biological species | ![]() | |||||||||
Method | helical reconstruction / cryo EM / Resolution: 3.2 Å | |||||||||
![]() | Xiaodan N / Ryan PM | |||||||||
Funding support | ![]()
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![]() | ![]() Title: The N terminus of α-synuclein dictates fibril formation. Authors: Ryan P McGlinchey / Xiaodan Ni / Jared A Shadish / Jiansen Jiang / Jennifer C Lee / ![]() Abstract: The generation of α-synuclein (α-syn) truncations from incomplete proteolysis plays a significant role in the pathogenesis of Parkinson's disease. It is well established that C-terminal truncations ...The generation of α-synuclein (α-syn) truncations from incomplete proteolysis plays a significant role in the pathogenesis of Parkinson's disease. It is well established that C-terminal truncations exhibit accelerated aggregation and serve as potent seeds in fibril propagation. In contrast, mechanistic understanding of N-terminal truncations remains ill defined. Previously, we found that disease-related C-terminal truncations resulted in increased fibrillar twist, accompanied by modest conformational changes in a more compact core, suggesting that the N-terminal region could be dictating fibril structure. Here, we examined three N-terminal truncations, in which deletions of 13-, 35-, and 40-residues in the N terminus modulated both aggregation kinetics and fibril morphologies. Cross-seeding experiments showed that out of the three variants, only ΔN13-α-syn (14‒140) fibrils were capable of accelerating full-length fibril formation, albeit slower than self-seeding. Interestingly, the reversed cross-seeding reactions with full-length seeds efficiently promoted all but ΔN40-α-syn (41-140). This behavior can be explained by the unique fibril structure that is adopted by 41-140 with two asymmetric protofilaments, which was determined by cryogenic electron microscopy. One protofilament resembles the previously characterized bent β-arch kernel, comprised of residues E46‒K96, whereas in the other protofilament, fewer residues (E61‒D98) are found, adopting an extended β-hairpin conformation that does not resemble other reported structures. An interfilament interface exists between residues K60‒F94 and Q62‒I88 with an intermolecular salt bridge between K80 and E83. Together, these results demonstrate a vital role for the N-terminal residues in α-syn fibril formation and structure, offering insights into the interplay of α-syn and its truncations. | |||||||||
History |
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Structure visualization
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 3.2 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 8.8 KB 8.8 KB | Display Display | ![]() |
Images | ![]() | 194.5 KB | ||
Filedesc metadata | ![]() | 4.7 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 336.4 KB | Display | ![]() |
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Full document | ![]() | 336 KB | Display | |
Data in XML | ![]() | 6.1 KB | Display | |
Data in CIF | ![]() | 6.8 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7lc9MC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 0.83 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : N-terminal alpha-synuclein truncation 41-140
Entire | Name: N-terminal alpha-synuclein truncation 41-140 |
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Components |
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-Supramolecule #1: N-terminal alpha-synuclein truncation 41-140
Supramolecule | Name: N-terminal alpha-synuclein truncation 41-140 / type: complex / ID: 1 / Parent: 0 / Macromolecule list: all |
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Source (natural) | Organism: ![]() |
-Macromolecule #1: Alpha-synuclein
Macromolecule | Name: Alpha-synuclein / type: protein_or_peptide / ID: 1 / Number of copies: 12 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 10.346242 KDa |
Recombinant expression | Organism: ![]() ![]() |
Sequence | String: GSKTKEGVVH GVATVAEKTK EQVTNVGGAV VTGVTAVAQK TVEGAGSIAA ATGFVKKDQL GKNEEGAPQE GILEDMPVDP DNEAYEMPS EEGYQDYEPE A UniProtKB: Alpha-synuclein |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | helical reconstruction |
Aggregation state | filament |
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Sample preparation
Buffer | pH: 7.4 |
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Vitrification | Cryogen name: ETHANE |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K2 SUMMIT (4k x 4k) / Average electron dose: 55.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
Final reconstruction | Applied symmetry - Helical parameters - Δz: 4.8 Å Applied symmetry - Helical parameters - Δ&Phi: -1.64 ° Applied symmetry - Helical parameters - Axial symmetry: C1 (asymmetric) Resolution.type: BY AUTHOR / Resolution: 3.2 Å / Resolution method: FSC 0.143 CUT-OFF / Number images used: 20867 |
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Startup model | Type of model: NONE |
Final angle assignment | Type: NOT APPLICABLE |