The Hc fragment of tetanus toxin complexed with an analogue of its ganglioside receptor GT1B

Experimental Data Snapshot

  • Resolution: 2.50 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.225 

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This is version 2.0 of the entry. See complete history


The crystal structure of tetanus toxin Hc fragment complexed with a synthetic GT1b analogue suggests cross-linking between ganglioside receptors and the toxin.

Fotinou, C.Emsley, P.Black, I.Ando, H.Ishida, H.Kiso, M.Sinha, K.A.Fairweather, N.F.Isaacs, N.W.

(2001) J Biol Chem 276: 32274-32281

  • DOI: https://doi.org/10.1074/jbc.M103285200
  • Primary Citation of Related Structures:  
    1FV2, 1FV3

  • PubMed Abstract: 

    Tetanus toxin, a member of the family of Clostridial neurotoxins, is one of the most potent toxins known. The crystal structure of the complex of the COOH-terminal fragment of the heavy chain with an analogue of its ganglioside receptor, GT1b, provides the first direct identification and characterization of the ganglioside-binding sites. The ganglioside induces cross-linking by binding to two distinct sites on the Hc molecule. The structure sheds new light on the binding of Clostridial neurotoxins to receptors on neuronal cells and provides important information relevant to the design of anti-tetanus and anti-botulism therapeutic agents.

  • Organizational Affiliation

    Department of Chemistry, University of Glasgow, Glasgow, G12 8QQ, Scotland, United Kingdom.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
TETANUS TOXIN HEAVY CHAIN472Clostridium tetaniMutation(s): 0 
Find proteins for P04958 (Clostridium tetani (strain Massachusetts / E88))
Explore P04958 
Go to UniProtKB:  P04958
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP04958
Sequence Annotations
  • Reference Sequence


Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
N-acetyl-alpha-neuraminic acid-(2-3)-beta-D-galactopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-galactopyranose-(1-4)-[N-acetyl-alpha-neuraminic acid-(2-8)-N-acetyl-beta-neuraminic acid-(2-3)]beta-D-galactopyranose-(1-4)-beta-D-glucopyranose
Glycosylation Resources
GlyTouCan:  G19543NY
GlyCosmos:  G19543NY
GlyGen:  G19543NY
Small Molecules
Experimental Data & Validation

Experimental Data

  • Resolution: 2.50 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.225 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 45.849α = 90
b = 52.172β = 99.55
c = 117.353γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
CCP4data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-09-05
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary