1LT6

HEAT-LABILE ENTEROTOXIN B-PENTAMER COMPLEXED WITH METANITROPHENYLGALACTOSIDE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.2 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

  • Primary Citation of Related Structures:  

  • 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, struc ...

    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: 
    • 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
    • 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


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HEAT-LABILE ENTEROTOXIN
D, E, F, G, H, L, M, N, O, P
103Escherichia coliMutation(s): 0 
Gene Names: eltB (ltpB)
Find proteins for P32890 (Escherichia coli)
Go to UniProtKB:  P32890
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GAA
Query on GAA

Download SDF File 
Download CCD File 
D, E, F, G, H, L, M, N, O, P
METANITROPHENYL-ALPHA-D-GALACTOSIDE
C12 H15 N O8
VCCMGHVCRFMITI-IIRVCBMXSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
GAAIC50: 500000 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.182 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 68.670α = 90.00
b = 95.360β = 100.77
c = 85.650γ = 90.00
Software Package:
Software NamePurpose
XENGENdata collection
MACROdata reduction
X-PLORrefinement
MACROdata scaling
XENGENdata reduction
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-12-03
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance