1TII

ESCHERICHIA COLI HEAT LABILE ENTEROTOXIN TYPE IIB


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a new heat-labile enterotoxin, LT-IIb.

van den Akker, F.Sarfaty, S.Twiddy, E.M.Connell, T.D.Holmes, R.K.Hol, W.G.

(1996) Structure 4: 665-678


  • PubMed Abstract: 
  • Cholera toxin from Vibrio cholerae and the type I heat-labile enterotoxins (LT-Is) from Escherichia coli are oligomeric proteins with AB5 structures. The type II heat-labile enterotoxins (LT-IIs) from E. coli are structurally similar to, but antigeni ...

    Cholera toxin from Vibrio cholerae and the type I heat-labile enterotoxins (LT-Is) from Escherichia coli are oligomeric proteins with AB5 structures. The type II heat-labile enterotoxins (LT-IIs) from E. coli are structurally similar to, but antigenically distinct from, the type I enterotoxins. The A subunits of type I and type II enterotoxins are homologous and activate adenylate cyclase by ADP-ribosylation of a G protein subunit, G8 alpha. However, the B subunits of type I and type II enterotoxins differ dramatically in amino acid sequence and ganglioside-binding specificity. The structure of LT-IIb was determined both as a prototype for other LT-IIs and to provide additional insights into structure/function relationships among members of the heat-labile enterotoxin family and the superfamily of ADP-ribosylating protein toxins.


    Related Citations: 
    • Crystal Structure of a Cholera Toxin-Related Heat-Labile Enterotoxin from E. Coli
      Sixma, T.K.,Pronk, S.E.,Kalk, K.H.,Wartna, E.S.,Van Zanten, B.A.,Witholt, B.,Hol, W.G.
      (1991) Nature 351: 371
    • Cloning, Nucleotide Sequence, and Hybridization Studies of the Type Iib Heat-Labile Enterotoxin Gene of Escherichia Coli
      Pickett, C.L.,Twiddy, E.M.,Coker, C.,Holmes, R.K.
      (1989) J.Bacteriol. 171: 4945


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
HEAT LABILE ENTEROTOXIN TYPE IIB
D, E, F, G, H
99Escherichia coliMutation(s): 0 
Find proteins for P43529 (Escherichia coli)
Go to UniProtKB:  P43529
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
HEAT LABILE ENTEROTOXIN TYPE IIB
A
190Escherichia coliMutation(s): 0 
Find proteins for P43528 (Escherichia coli)
Go to UniProtKB:  P43528
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
HEAT LABILE ENTEROTOXIN TYPE IIB
C
53Escherichia coliMutation(s): 0 
Find proteins for P43528 (Escherichia coli)
Go to UniProtKB:  P43528
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.191 
  • Space Group: P 31 2 1
Unit Cell:
Length (Å)Angle (°)
a = 105.700α = 90.00
b = 105.700β = 90.00
c = 171.600γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing
X-PLORrefinement
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-08-17
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance