1F82

BOTULINUM NEUROTOXIN TYPE B CATALYTIC DOMAIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Cocrystal structure of synaptobrevin-II bound to botulinum neurotoxin type B at 2.0 A resolution.

Hanson, M.A.Stevens, R.C.

(2000) Nat Struct Biol 7: 687-692

  • DOI: 10.1038/77997
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Botulinum neurotoxin serotype B is a zinc protease that disrupts neurotransmitter release by cleaving synaptobrevin-II (Sb2), one of three SNARE proteins involved in neuronal synaptic vesicle fusion. The three-dimensional crystal structure of the apo ...

    Botulinum neurotoxin serotype B is a zinc protease that disrupts neurotransmitter release by cleaving synaptobrevin-II (Sb2), one of three SNARE proteins involved in neuronal synaptic vesicle fusion. The three-dimensional crystal structure of the apo botulinum neurotoxin serotype B catalytic domain (BoNT/B-LC) has been determined to 2.2 A resolution, and the complex of cleaved Sb2 with the catalytic domain (Sb2-BoNT/B-LC) has been determined to 2.0 A resolution. A comparison of the holotoxin catalytic domain and the isolated BoNT/B-LC structure shows a rearrangement of three active site loops. This rearrangement exposes the BoNT/B active site. The Sb2-BoNT/B-LC structure illustrates two distinct binding regions, which explains the specificity of each botulinum neurotoxin for its synaptic vesicle protein. This observation provides an explanation for the proposed cooperativity between binding of full-length substrate and catalysis and suggest a mechanism of synaptobrevin proteolysis employed by the clostridial neurotoxins.


    Organizational Affiliation

    Department of Chemistry and Molecular Biology, The Scripps Research Institute, La Jolla, California 92037, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
BOTULINUM NEUROTOXIN TYPE B
A
424Clostridium botulinumMutation(s): 0 
Gene Names: botB
EC: 3.4.24.69
Find proteins for P10844 (Clostridium botulinum)
Go to UniProtKB:  P10844
Protein Feature View
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.244 
  • R-Value Observed: 0.228 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 55.807α = 90
b = 62.684β = 90
c = 130.278γ = 90
Software Package:
Software NamePurpose
AMoREphasing
CNSrefinement
MAR345data collection
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2000-08-16
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2017-10-04
    Changes: Refinement description