4LO4

Apo HA-70


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.87 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.187 

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: https://doi.org/10.1371/journal.ppat.1003690
  • Primary Citation of Related Structures:  
    4LO0, 4LO1, 4LO2, 4LO3, 4LO4, 4LO5, 4LO6, 4LO7, 4LO8

  • 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 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:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
HA-70190Clostridium botulinumMutation(s): 0 
Gene Names: ha70
UniProt
Find proteins for Q8KHU9 (Clostridium botulinum)
Explore Q8KHU9 
Go to UniProtKB:  Q8KHU9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8KHU9
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
HA-70433Clostridium botulinumMutation(s): 0 
Gene Names: ha70
UniProt
Find proteins for Q8KHU9 (Clostridium botulinum)
Explore Q8KHU9 
Go to UniProtKB:  Q8KHU9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ8KHU9
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download Ideal Coordinates CCD File 
C [auth B]CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.87 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.187 
  • Space Group: I 41 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 261.75α = 90
b = 261.75β = 90
c = 261.75γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASESphasing
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

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