3R4S

Cell entry of botulinum neurotoxin type C is dependent upon interaction with two ganglioside molecules


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

The biological activity of botulinum neurotoxin type C is dependent upon novel types of ganglioside binding sites.

Strotmeier, J.Gu, S.Jutzi, S.Mahrhold, S.Zhou, J.Pich, A.Eichner, T.Bigalke, H.Rummel, A.Jin, R.Binz, T.

(2011) Mol Microbiol 81: 143-156

  • DOI: 10.1111/j.1365-2958.2011.07682.x
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • The seven botulinum neurotoxins (BoNT) cause muscle paralysis by selectively cleaving core components of the vesicular fusion machinery. Their extraordinary activity primarily relies on highly specific entry into neurons. Data on BoNT/A, B, E, F and ...

    The seven botulinum neurotoxins (BoNT) cause muscle paralysis by selectively cleaving core components of the vesicular fusion machinery. Their extraordinary activity primarily relies on highly specific entry into neurons. Data on BoNT/A, B, E, F and G suggest that entry follows a dual receptor interaction with complex gangliosides via an established ganglioside binding region and a synaptic vesicle protein. Here, we report high resolution crystal structures of the BoNT/C cell binding fragment alone and in complex with sialic acid. The WY-motif characteristic of the established ganglioside binding region was located on an exposed loop. Sialic acid was co-ordinated at a novel position neighbouring the binding pocket for synaptotagmin in BoNT/B and G and the sialic acid binding site in BoNT/D and TeNT respectively. Employing synaptosomes and immobilized gangliosides binding studies with BoNT/C mutants showed that the ganglioside binding WY-loop, the newly identified sialic acid-co-ordinating pocket and the area corresponding to the established ganglioside binding region of other BoNTs are involved in ganglioside interaction. Phrenic nerve hemidiaphragm activity tests employing ganglioside deficient mice furthermore evidenced that the biological activity of BoNT/C depends on ganglioside interaction with at least two binding sites. These data suggest a unique cell binding and entry mechanism for BoNT/C among clostridial neurotoxins.


    Organizational Affiliation

    Institut für Toxikologie, OE 5340 Institut für Biochemie, OE 4310, Medizinische Hochschule Hannover, Carl-Neuberg-Str 1, 30625 Hannover, Germany.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Botulinum neurotoxin type C1
A, B
443Clostridium botulinumMutation(s): 0 
EC: 3.4.24.69
Find proteins for P18640 (Clostridium botulinum C phage)
Go to UniProtKB:  P18640
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SLB
Query on SLB

Download CCD File 
A, B
5-N-ACETYL-BETA-D-NEURAMINIC ACID
C11 H19 N O9
SQVRNKJHWKZAKO-PFQGKNLYSA-N
 Ligand Interaction
SIA
Query on SIA

Download CCD File 
A, B
O-SIALIC ACID
C11 H19 N O9
SQVRNKJHWKZAKO-YRMXFSIDSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.15 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 98.381α = 90
b = 77.047β = 116.73
c = 108.567γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-06-08
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2018-03-07
    Changes: Experimental preparation