2E4M

Crystal structure of hemagglutinin subcomponent complex (HA-33/HA-17) from Clostridium botulinum serotype D strain 4947


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.196 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

A Novel Subunit Structure of Clostridium botulinum Serotype D Toxin Complex with Three Extended Arms

Hasegawa, K.Watanabe, T.Suzuki, T.Yamano, A.Oikawa, T.Sato, Y.Kouguchi, H.Yoneyama, T.Niwa, K.Ikeda, T.Ohyama, T.

(2007) J Biol Chem 282: 24777-24783

  • DOI: 10.1074/jbc.M703446200
  • Primary Citation of Related Structures:  
    2E4M

  • PubMed Abstract: 
  • The botulinum neurotoxins (BoNTs) are the most potent toxins known in nature, causing the lethal disease known as botulism in humans and animals. The BoNTs act by inhibiting neurotransmitter release from cholinergic synapses. Clostridium botulinum strains produce large BoNTs toxin complexes, which include auxiliary non-toxic proteins that appear not only to protect BoNTs from the hostile environment of the digestive tract but also to assist BoNT translocation across the intestinal mucosal layer ...

    The botulinum neurotoxins (BoNTs) are the most potent toxins known in nature, causing the lethal disease known as botulism in humans and animals. The BoNTs act by inhibiting neurotransmitter release from cholinergic synapses. Clostridium botulinum strains produce large BoNTs toxin complexes, which include auxiliary non-toxic proteins that appear not only to protect BoNTs from the hostile environment of the digestive tract but also to assist BoNT translocation across the intestinal mucosal layer. In this study, we visualize for the first time a series of botulinum serotype D toxin complexes using negative stain transmission electron microscopy (TEM). The complexes consist of the 150-kDa BoNT, 130-kDa non-toxic non-hemagglutinin (NTNHA), and three kinds of hemagglutinin (HA) subcomponents: 70-kDa HA-70, 33-kDa HA-33, and 17-kDa HA-17. These components assemble sequentially to form the complex. A novel TEM image of the mature L-TC revealed an ellipsoidal-shaped structure with "three arms" attached. The "body" section was comprised of a single BoNT, a single NTNHA and three HA-70 molecules. The arm section consisted of a complex of HA-33 and HA-17 molecules. We determined the x-ray crystal structure of the complex formed by two HA-33 plus one HA-17. On the basis of the TEM image and biochemical results, we propose a novel 14-mer subunit model for the botulinum toxin complex. This unique model suggests how non-toxic components make up a "delivery vehicle" for BoNT.


    Organizational Affiliation

    Department of Food Science and Technology, Faculty of Bioindustry, Tokyo University of Agriculture, 196 Yasaka, Abashiri 099-2493, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Main hemagglutinin componentA, B286Clostridium botulinumMutation(s): 0 
Gene Names: ha33
UniProt
Find proteins for K4Q2R6 (Clostridium botulinum)
Explore K4Q2R6 
Go to UniProtKB:  K4Q2R6
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HA-17C146Clostridium botulinumMutation(s): 0 
UniProt
Find proteins for Q9LBR4 (Clostridium botulinum D phage)
Explore Q9LBR4 
Go to UniProtKB:  Q9LBR4
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.194 
  • R-Value Observed: 0.196 
  • Space Group: H 3 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 239.132α = 90
b = 239.132β = 90
c = 100.024γ = 120
Software Package:
Software NamePurpose
REFMACrefinement
CrystalCleardata collection
XTALVIEWrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2007-06-19
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance