1CHP

SURPRISING LEADS FOR A CHOLERA TOXIN RECEPTOR BINDING ANTAGONIST; CRYSTALLOGRAPHIC STUDIES OF CTB MUTANTS


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.178 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Surprising leads for a cholera toxin receptor-binding antagonist: crystallographic studies of CTB mutants.

Merritt, E.A.Sarfaty, S.Chang, T.T.Palmer, L.M.Jobling, M.G.Holmes, R.K.Hol, W.G.

(1995) Structure 3: 561-570

  • Primary Citation of Related Structures:  1CHQ

  • PubMed Abstract: 
  • Because agents which inhibit the receptor binding of cholera toxin constitute possible lead compounds for the structure-based design of anti-cholera drugs, detailed investigation of the toxin's receptor-binding site is of key importance. The substitu ...

    Because agents which inhibit the receptor binding of cholera toxin constitute possible lead compounds for the structure-based design of anti-cholera drugs, detailed investigation of the toxin's receptor-binding site is of key importance. The substitution Gly-->Asp at residue 33 of the cholera toxin B subunit (CTB) has been reported to abolish receptor-binding ability. The substitution Arg35-->Asp has been reported to result in deficient assembly of the AB5 holotoxin. The molecular basis for these effects was not readily apparent from analysis of an earlier crystal structure of the wild-type toxin B pentamer in a complex with the receptor pentasaccharide.


    Related Citations: 
    • Analysis of Structure and Function of the B Subunit of Cholera Toxin by the Use of Site-Directed Mutagenesis
      Jobling, M.G.,Holmes, R.K.
      (1991) Mol.Microbiol. 5: 1755
    • 2.2 Angstroms Crystal Structure of Cholera Toxin B5 Pentamer Bound to Receptor GM1 Pentasaccharide
      Merritt, E.A.,Sarfaty, S.,Van Den Akker, F.,L'Hoir, C.,Martial, J.A.,Hol, W.G.J.
      (1994) Protein Sci. 3: 166


    Organizational Affiliation

    Department of Biological Structure, University of Washington, Seattle 98195, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
CHOLERA TOXIN B PENTAMER
D, E, F, G, H
103Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961)Gene Names: ctxB (toxB)
Find proteins for P01556 (Vibrio cholerae serotype O1 (strain ATCC 39315 / El Tor Inaba N16961))
Go to UniProtKB:  P01556
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
H
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.178 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 102.600α = 90.00
b = 66.610β = 131.57
c = 99.710γ = 90.00
Software Package:
Software NamePurpose
XENGENdata collection
X-PLORphasing
X-PLORrefinement
XENGENdata reduction
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-03-08
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance