4LO0

Apo HA17-HA33


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.06 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.189 

wwPDB Validation   3D Report Full Report


This is version 1.1 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 ...

    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
MoleculeChainsSequence LengthOrganismDetailsImage
HA-33A,
C [auth B]
296Clostridium botulinumMutation(s): 0 
Gene Names: HA-33ha33ha34HAHYH72_02050
UniProt
Find proteins for Q45871 (Clostridium botulinum)
Explore Q45871 
Go to UniProtKB:  Q45871
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ45871
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HA-17B [auth C]147Clostridium botulinumMutation(s): 0 
Gene Names: ha17HA-17HAEXM69_13435HYH72_02045
UniProt
Find proteins for Q45878 (Clostridium botulinum)
Explore Q45878 
Go to UniProtKB:  Q45878
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ45878
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.06 Å
  • R-Value Free: 0.217 
  • R-Value Work: 0.188 
  • R-Value Observed: 0.189 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 106.599α = 90
b = 118.68β = 90
c = 162.509γ = 90
Software Package:
Software NamePurpose
JBluIce-EPICSdata collection
PHASESphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data 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
  • Version 1.1: 2017-11-15
    Changes: Advisory, Refinement description