6G5G

Crystal structure of an engineered Botulinum Neurotoxin type B mutant E1191M/S1199Y in complex with human synaptotagmin 2


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.190 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Engineered botulinum neurotoxin B with improved binding to human receptors has enhanced efficacy in preclinical models.

Elliott, M.Favre-Guilmard, C.Liu, S.M.Maignel, J.Masuyer, G.Beard, M.Boone, C.Carre, D.Kalinichev, M.Lezmi, S.Mir, I.Nicoleau, C.Palan, S.Perier, C.Raban, E.Zhang, S.Dong, M.Stenmark, P.Krupp, J.

(2019) Sci Adv 5: eaau7196-eaau7196

  • DOI: 10.1126/sciadv.aau7196
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Although botulinum neurotoxin serotype A (BoNT/A) products are common treatments for various disorders, there is only one commercial BoNT/B product, whose low potency, likely stemming from low affinity toward its human receptor synaptotagmin 2 (hSyt2 ...

    Although botulinum neurotoxin serotype A (BoNT/A) products are common treatments for various disorders, there is only one commercial BoNT/B product, whose low potency, likely stemming from low affinity toward its human receptor synaptotagmin 2 (hSyt2), has limited its therapeutic usefulness. We express and characterize two full-length recombinant BoNT/B1 proteins containing designed mutations E1191M/S1199Y (rBoNT/B1 MY ) and E1191Q/S1199W (rBoNT/B1 QW ) that enhance binding to hSyt2. In preclinical models including human-induced pluripotent stem cell neurons and a humanized transgenic mouse, this increased hSyt2 affinity results in high potency, comparable to that of BoNT/A. Last, we solve the cocrystal structure of rBoNT/B1 MY in complex with peptides of hSyt2 and its homolog hSyt1. We demonstrate that neuronal surface receptor binding limits the clinical efficacy of unmodified BoNT/B and that modified BoNT/B proteins have promising clinical potential.


    Organizational Affiliation

    Ipsen Bioinnovation, 102 Park Drive, Milton Park, Abingdon OX14 4RY, UK.,Department of Experimental Medical Science, Lund University, 221 00 Lund, Sweden.,Department of Urology, Boston Children's Hospital, Department of Microbiology and Immunobiology and Department of Surgery, Harvard Medical School, Boston, MA 02115, USA.,Department of Biochemistry and Biophysics, Stockholm University, Stockholm SE-106 91, Sweden.,Ipsen Innovation, 5 Avenue du Canada, 91940 Les Ulis, France.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Botulinum neurotoxin type B
A, B
1291Clostridium botulinumMutation(s): 2 
Gene Names: botB
Find proteins for P10844 (Clostridium botulinum)
Go to UniProtKB:  P10844
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Synaptotagmin 2
P
21Pongo abeliiMutation(s): 0 
Find proteins for H2PUC2 (Pongo abelii)
Go to UniProtKB:  H2PUC2
Small Molecules
Ligands 6 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ACT
Query on ACT

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Download CCD File 
B
ACETATE ION
C2 H3 O2
QTBSBXVTEAMEQO-UHFFFAOYSA-M
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
B
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
EDO
Query on EDO

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Download CCD File 
A
1,2-ETHANEDIOL
ETHYLENE GLYCOL
C2 H6 O2
LYCAIKOWRPUZTN-UHFFFAOYSA-N
 Ligand Interaction
MG
Query on MG

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A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
PEG
Query on PEG

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B
DI(HYDROXYETHYL)ETHER
C4 H10 O3
MTHSVFCYNBDYFN-UHFFFAOYSA-N
 Ligand Interaction
TRS
Query on TRS

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Download CCD File 
B
2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
TRIS BUFFER
C4 H12 N O3
LENZDBCJOHFCAS-UHFFFAOYSA-O
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.223 
  • R-Value Work: 0.190 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 166.600α = 90.00
b = 211.050β = 90.00
c = 120.320γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
PHASERphasing
MOSFLMdata reduction
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Swedish Research CouncilSweden--

Revision History 

  • Version 1.0: 2019-01-16
    Type: Initial release
  • Version 1.1: 2019-02-20
    Type: Data collection, Database references