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- PDB-8js8: Cryo-EM structure of SV2A in complex with BoNT/A2 Hc and levetiracetam -

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Basic information

Entry
Database: PDB / ID: 8js8
TitleCryo-EM structure of SV2A in complex with BoNT/A2 Hc and levetiracetam
Components
  • Botulinum neurotoxin
  • Synaptic vesicle glycoprotein 2A
KeywordsTRANSPORT PROTEIN / Synaptic vesicle / epilepsy
Function / homology
Function and homology information


Toxicity of botulinum toxin type F (botF) / Toxicity of botulinum toxin type D (botD) / Toxicity of botulinum toxin type E (botE) / Toxicity of botulinum toxin type A (botA) / host cell presynaptic membrane / host cell cytoplasmic vesicle / presynaptic active zone / host cell cytosol / synaptic vesicle priming / protein transmembrane transporter activity ...Toxicity of botulinum toxin type F (botF) / Toxicity of botulinum toxin type D (botD) / Toxicity of botulinum toxin type E (botE) / Toxicity of botulinum toxin type A (botA) / host cell presynaptic membrane / host cell cytoplasmic vesicle / presynaptic active zone / host cell cytosol / synaptic vesicle priming / protein transmembrane transporter activity / transmembrane transporter activity / neuromuscular junction / GABA-ergic synapse / metalloendopeptidase activity / intracellular calcium ion homeostasis / synaptic vesicle / cell-cell junction / synaptic vesicle membrane / toxin activity / neuron projection / protein kinase binding / host cell plasma membrane / glutamatergic synapse / endoplasmic reticulum / proteolysis / extracellular region / zinc ion binding / plasma membrane
Similarity search - Function
: / SV2A/B/C luminal domain / Synaptic vesicle protein SV2 / Sugar transporter, conserved site / Major facilitator, sugar transporter-like / Sugar (and other) transporter / Clostridium neurotoxin, translocation / Clostridium neurotoxin, Translocation domain / Clostridium neurotoxin, translocation domain / Clostridium neurotoxin, receptor-binding C-terminal ...: / SV2A/B/C luminal domain / Synaptic vesicle protein SV2 / Sugar transporter, conserved site / Major facilitator, sugar transporter-like / Sugar (and other) transporter / Clostridium neurotoxin, translocation / Clostridium neurotoxin, Translocation domain / Clostridium neurotoxin, translocation domain / Clostridium neurotoxin, receptor-binding C-terminal / Clostridium neurotoxin, C-terminal receptor binding / Clostridial neurotoxin zinc protease / Botulinum/Tetanus toxin, catalytic chain / Clostridium neurotoxin, receptor binding N-terminal / Clostridium neurotoxin, N-terminal receptor binding / Kunitz inhibitor STI-like superfamily / Major facilitator superfamily / Major Facilitator Superfamily / Major facilitator superfamily domain / Major facilitator superfamily (MFS) profile. / MFS transporter superfamily / Concanavalin A-like lectin/glucanase domain superfamily
Similarity search - Domain/homology
: / Bontoxilysin-A / Synaptic vesicle glycoprotein 2A
Similarity search - Component
Biological speciesHomo sapiens (human)
Clostridium botulinum (bacteria)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.88 Å
AuthorsYamagata, A.
Funding support Japan, 1items
OrganizationGrant numberCountry
Japan Society for the Promotion of Science (JSPS)JP22H02564 Japan
CitationJournal: Nat Commun / Year: 2024
Title: Structural basis for antiepileptic drugs and botulinum neurotoxin recognition of SV2A.
Authors: Atsushi Yamagata / Kaori Ito / Takehiro Suzuki / Naoshi Dohmae / Tohru Terada / Mikako Shirouzu /
Abstract: More than one percent of people have epilepsy worldwide. Levetiracetam (LEV) is a successful new-generation antiepileptic drug (AED), and its derivative, brivaracetam (BRV), shows improved efficacy. ...More than one percent of people have epilepsy worldwide. Levetiracetam (LEV) is a successful new-generation antiepileptic drug (AED), and its derivative, brivaracetam (BRV), shows improved efficacy. Synaptic vesicle glycoprotein 2a (SV2A), a putative membrane transporter in the synaptic vesicles (SVs), has been identified as a target of LEV and BRV. SV2A also serves as a receptor for botulinum neurotoxin (BoNT), which is the most toxic protein and has paradoxically emerged as a potent reagent for therapeutic and cosmetic applications. Nevertheless, no structural analysis on AEDs and BoNT recognition by full-length SV2A has been available. Here we describe the cryo-electron microscopy structures of the full-length SV2A in complex with the BoNT receptor-binding domain, BoNT/A2 H and either LEV or BRV. The large fourth luminal domain of SV2A binds to BoNT/A2 H through protein-protein and protein-glycan interactions. LEV and BRV occupy the putative substrate-binding site in an outward-open conformation. A propyl group in BRV creates additional contacts with SV2A, explaining its higher binding affinity than that of LEV, which was further supported by label-free spectral shift assay. Numerous LEV derivatives have been developed as AEDs and positron emission tomography (PET) tracers for neuroimaging. Our work provides a structural framework for AEDs and BoNT recognition of SV2A and a blueprint for the rational design of additional AEDs and PET tracers.
History
DepositionJun 19, 2023Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0May 1, 2024Provider: repository / Type: Initial release
Revision 1.1May 8, 2024Group: Database references / Category: citation
Item: _citation.page_last / _citation.pdbx_database_id_PubMed / _citation.title
Revision 1.2Oct 16, 2024Group: Data collection / Structure summary
Category: em_admin / pdbx_entry_details / pdbx_modification_feature
Item: _em_admin.last_update / _pdbx_entry_details.has_protein_modification

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

Downloads & links

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Assembly

Deposited unit
A: Synaptic vesicle glycoprotein 2A
B: Botulinum neurotoxin
hetero molecules


Theoretical massNumber of molelcules
Total (without water)134,4136
Polymers133,2302
Non-polymers1,1834
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Synaptic vesicle glycoprotein 2A


Mass: 83774.008 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: SV2A / Production host: Spodoptera frugiperda (fall armyworm) / References: UniProt: Q7L0J3
#2: Protein Botulinum neurotoxin


Mass: 49456.191 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Clostridium botulinum (bacteria) / Production host: Escherichia coli (E. coli) / References: UniProt: D2KCK3
#3: Polysaccharide 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta- ...2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-[alpha-L-fucopyranose-(1-6)]2-acetamido-2-deoxy-beta-D-glucopyranose


Type: oligosaccharide / Mass: 570.542 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
DescriptorTypeProgram
DGlcpNAcb1-4[LFucpa1-6]DGlcpNAcb1-Glycam Condensed SequenceGMML 1.0
WURCS=2.0/2,3,2/[a2122h-1b_1-5_2*NCC/3=O][a1221m-1a_1-5]/1-1-2/a4-b1_a6-c1WURCSPDB2Glycan 1.1.0
[]{[(4+1)][b-D-GlcpNAc]{[(4+1)][b-D-GlcpNAc]{}[(6+1)][a-L-Fucp]{}}}LINUCSPDB-CARE
#4: Sugar ChemComp-NAG / 2-acetamido-2-deoxy-beta-D-glucopyranose / N-acetyl-beta-D-glucosamine / 2-acetamido-2-deoxy-beta-D-glucose / 2-acetamido-2-deoxy-D-glucose / 2-acetamido-2-deoxy-glucose / N-ACETYL-D-GLUCOSAMINE


Type: D-saccharide, beta linking / Mass: 221.208 Da / Num. of mol.: 2
Source method: isolated from a genetically manipulated source
Formula: C8H15NO6 / Feature type: SUBJECT OF INVESTIGATION
IdentifierTypeProgram
DGlcpNAcbCONDENSED IUPAC CARBOHYDRATE SYMBOLGMML 1.0
N-acetyl-b-D-glucopyranosamineCOMMON NAMEGMML 1.0
b-D-GlcpNAcIUPAC CARBOHYDRATE SYMBOLPDB-CARE 1.0
GlcNAcSNFG CARBOHYDRATE SYMBOLGMML 1.0
#5: Chemical ChemComp-UKX / (2S)-2-(2-oxidanylidenepyrrolidin-1-yl)butanamide / levetiracetam


Mass: 170.209 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: C8H14N2O2 / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
Has protein modificationY

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

ComponentName: SV2A in complex with BoNT/A2 Hc domain and anti-epileptic drug, levetiracetam
Type: COMPLEX / Entity ID: #2 / Source: RECOMBINANT
Molecular weightExperimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Clostridium botulinum (bacteria)
Buffer solutionpH: 7.5
Details: 20 mM Hepes (pH7.5), 150 mM NaCl, 0.001% LMNG, 0.0002% cholesterol hemisuccinate
SpecimenEmbedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 297 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 / Nominal defocus max: 2000 nm / Nominal defocus min: 800 nm / Cs: 2.7 mm
Image recordingElectron dose: 50.8 e/Å2 / Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Num. of grids imaged: 1 / Num. of real images: 6518

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Processing

EM software
IDNameVersionCategory
1cryoSPARCparticle selection
4cryoSPARCCTF correction
7Cootmodel fitting
9cryoSPARCinitial Euler assignment
10cryoSPARCfinal Euler assignment
11cryoSPARCclassification
12cryoSPARC3D reconstruction
13PHENIX1.2model refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 6409122
3D reconstructionResolution: 2.88 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 646723 / Symmetry type: POINT
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0038383
ELECTRON MICROSCOPYf_angle_d0.5611335
ELECTRON MICROSCOPYf_dihedral_angle_d4.5681140
ELECTRON MICROSCOPYf_chiral_restr0.0441244
ELECTRON MICROSCOPYf_plane_restr0.0031428

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