4LO4

Apo HA-70


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.871 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.186 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure of a Bimodular Botulinum Neurotoxin Complex Provides Insights into Its Oral Toxicity.

Lee, K.Gu, S.Jin, L.Le, T.T.Cheng, L.W.Strotmeier, J.Kruel, A.M.Yao, G.Perry, K.Rummel, A.Jin, R.

(2013) Plos Pathog. 9: e1003690-e1003690

  • DOI: 10.1371/journal.ppat.1003690
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Botulinum neurotoxins (BoNTs) are produced by Clostridium botulinum and cause the fatal disease botulism, a flaccid paralysis of the muscle. BoNTs are released together with several auxiliary proteins as progenitor toxin complexes (PTCs) to become hi ...

    Botulinum neurotoxins (BoNTs) are produced by Clostridium botulinum and cause the fatal disease botulism, a flaccid paralysis of the muscle. BoNTs are released together with several auxiliary proteins as progenitor toxin complexes (PTCs) to become highly potent oral poisons. Here, we report the structure of a ∼760 kDa 14-subunit large PTC of serotype A (L-PTC/A) and reveal insight into its absorption mechanism. Using a combination of X-ray crystallography, electron microscopy, and functional studies, we found that L-PTC/A consists of two structurally and functionally independent sub-complexes. A hetero-dimeric 290 kDa complex protects BoNT, while a hetero-dodecameric 470 kDa complex facilitates its absorption in the harsh environment of the gastrointestinal tract. BoNT absorption is mediated by nine glycan-binding sites on the dodecameric sub-complex that forms multivalent interactions with carbohydrate receptors on intestinal epithelial cells. We identified monosaccharides that blocked oral BoNT intoxication in mice, which suggests a new strategy for the development of preventive countermeasures for BoNTs based on carbohydrate receptor mimicry.


    Organizational Affiliation

    Department of Physiology and Biophysics, University of California, Irvine, California, United States of America.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HA-70
A
190Clostridium botulinumMutation(s): 0 
Gene Names: ha70
Find proteins for Q8KHU9 (Clostridium botulinum)
Go to UniProtKB:  Q8KHU9
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
HA-70
B
433Clostridium botulinumMutation(s): 0 
Gene Names: ha70
Find proteins for Q8KHU9 (Clostridium botulinum)
Go to UniProtKB:  Q8KHU9
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.871 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.186 
  • Space Group: I 41 3 2
Unit Cell:
Length (Å)Angle (°)
a = 261.750α = 90.00
b = 261.750β = 90.00
c = 261.750γ = 90.00
Software Package:
Software NamePurpose
PHASESphasing
PHENIXrefinement
SCALAdata scaling
MOSFLMdata reduction
Blu-Icedata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-10-30
    Type: Initial release