4LO6

HA70-alpha2,6-SiaLC


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.187 

wwPDB Validation   3D Report Full Report


This is version 2.0 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:  
    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-70A190Clostridium 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
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HA-70B433Clostridium 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
Protein Feature View
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  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
N-acetyl-alpha-neuraminic acid-(2-6)-beta-D-galactopyranoseC 2N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G63069TR
GlyCosmos:  G63069TR
GlyGen:  G63069TR
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.186 
  • R-Value Observed: 0.187 
  • Space Group: I 41 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 261.48α = 90
b = 261.48β = 90
c = 261.48γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
PHASESphasing
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-10-30
    Type: Initial release
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Database references, Derived calculations, Structure summary