1LT6

HEAT-LABILE ENTEROTOXIN B-PENTAMER COMPLEXED WITH METANITROPHENYLGALACTOSIDE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.182 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structural foundation for the design of receptor antagonists targeting Escherichia coli heat-labile enterotoxin.

Merritt, E.A.Sarfaty, S.Feil, I.K.Hol, W.G.

(1997) Structure 5: 1485-1499

  • DOI: 10.1016/s0969-2126(97)00298-0
  • Primary Citation of Related Structures:  
    1LT6, 1LT5

  • PubMed Abstract: 
  • Escherichia coli heat-labile enterotoxin (LT) is the causative agent of traveller's diarrhoea, and it is also responsible for the deaths of hundreds of thousands of children per year in developing countries. LT is highly homologous in sequence, structure and function to cholera toxin (CT) ...

    Escherichia coli heat-labile enterotoxin (LT) is the causative agent of traveller's diarrhoea, and it is also responsible for the deaths of hundreds of thousands of children per year in developing countries. LT is highly homologous in sequence, structure and function to cholera toxin (CT). Both toxins attack intestinal epithelial cells via specific binding to the branched pentasaccharide of ganglioside GM1 at the cell surface. A receptor-binding antagonist which blocked this interaction would potentially constitute a prophylactic drug conferring protection both against the severe effects of cholera itself and against the milder but more common disease caused by LT.


    Related Citations: 
    • Galactose-Binding Site in Escherichia Coli Heat-Labile Enterotoxin (Lt) and Cholera Toxin (Ct)
      Merritt, E.A., Sixma, T.K., Kalk, K.H., Van Zanten, B.A., Hol, W.G.
      (1994) Mol Microbiol 13: 745
    • Refined Structure of Escherichia Coli Heat-Labile Enterotoxin, a Close Relative of Cholera Toxin
      Sixma, T.K., Kalk, K.H., Van Zanten, B.A., Dauter, Z., Kingma, J., Witholt, B., Hol, W.G.
      (1993) J Mol Biol 230: 890

    Organizational Affiliation

    Department of Biological Structure University of Washington Seattle, WA 98195-7742, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HEAT-LABILE ENTEROTOXINDEFGHLMNDEFGHLMNOP
103Escherichia coliMutation(s): 0 
Gene Names: eltBltpB
Find proteins for P32890 (Escherichia coli)
Explore P32890 
Go to UniProtKB:  P32890
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.182 
  • R-Value Observed: 0.182 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 68.67α = 90
b = 95.36β = 100.77
c = 85.65γ = 90
Software Package:
Software NamePurpose
XENGENdata collection
MACROdata reduction
AMoREphasing
X-PLORrefinement
XENGENdata reduction
MACROdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1997-12-03
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations, Structure summary