Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 111.46 kDa 
• Atom Count: 7,786 
• Modelled Residue Count: 902 
• Deposited Residue Count: 944 
• Unique protein chains: 1

 1FV3

THE HC FRAGMENT OF TETANUS TOXIN COMPLEXED WITH AN ANALOGUE OF ITS GANGLIOSIDE RECEPTOR GT1B

• PDB DOI:  https://doi.org/10.2210/pdb1FV3/pdb

• Classification: TOXIN
• Organism(s): Clostridium tetani
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2000-09-18 Released: 2001-09-05 
• Deposition Author(s): Fotinou, C., Emsley, P., Black, I., Ando, H., Ishida, H., Kiso, M., Sinha, K.A., Fairweather, N.F., Isaacs, N.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.306 
• R-Value Work: 0.237 
• R-Value Observed: 0.239 

Literature

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

• PubMed: 11418600 
• 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.

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Related Citations: 

• The Structures of the HC Fragment of Tetanus Toxin with Carbohydrate Subunit Complexes Provide Insight into Ganglioside Binding
  Emsley, P., Fotinou, C., Black, I., Fairweather, N.F., Charles, I.G., Watts, C., Hewitt, E., Isaacs, N.W.
  (2000) J Biol Chem 275: 8889

• Structure of the receptor binding fragment Hc of tetanus neurotoxin
  Umland, T.C., Wingert, L.M., Swaminathan, S., Furey, W.F., Schmidt, J.J., Sax, M.
  (1997) Nat Struct Biol 4: 788

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Organizational Affiliation: 

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

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TETANUS TOXIN HEAVY CHAIN	A, B	472	Clostridium tetani	Mutation(s): 0  EC: 3.4.24.68
UniProt
Find proteins for P04958 (Clostridium tetani (strain Massachusetts / E88)) Explore P04958  Go to UniProtKB:  P04958

Oligosaccharides

Help

Entity ID: 2
Molecule	Chains	Chain Length	2D Diagram	Glycosylation
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	C, D	7		N/A
Glycosylation Resources
GlyTouCan:  G19543NY GlyCosmos:  G19543NY GlyGen:  G19543NY

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
CEQ	E [auth A], G [auth B]	ETHYL-TRIMETHYL-SILANE C5 H14 Si UKAJDOBPPOAZSS-UHFFFAOYSA-N
PO4	F [auth B]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 0.306 
• R-Value Work: 0.237 
• R-Value Observed: 0.239 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 91.311	α = 90
b = 53.068	β = 89.78
c = 118.278	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
AMoRE	phasing
REFMAC	refinement
CCP4	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2001-09-05 
Deposition Author(s): Fotinou, C., Emsley, P., Black, I., Ando, H., Ishida, H., Kiso, M., Sinha, K.A., Fairweather, N.F., Isaacs, N.W.

Revision History  

• 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: Advisory, Refinement description, Version format compliance
• Version 1.3: 2016-06-08
  Changes: Database references
• Version 2.0: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Advisory, Atomic model, Data collection, Derived calculations, Structure summary