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 
  • R-Value Observed: 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

  • DOI: 10.1016/s0969-2126(96)00073-1
  • Primary Citation of Related Structures:  
    1TII

  • 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 antigenically distinct from, the type I enterotoxins ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
HEAT LABILE ENTEROTOXIN TYPE IIBA [auth D], B [auth E], C [auth F], D [auth G], E [auth H]99Escherichia coliMutation(s): 0 
UniProt
Find proteins for P43529 (Escherichia coli)
Explore P43529 
Go to UniProtKB:  P43529
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
HEAT LABILE ENTEROTOXIN TYPE IIBF [auth A]190Escherichia coliMutation(s): 0 
UniProt
Find proteins for P43528 (Escherichia coli)
Explore P43528 
Go to UniProtKB:  P43528
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetailsImage
HEAT LABILE ENTEROTOXIN TYPE IIBG [auth C]53Escherichia coliMutation(s): 0 
UniProt
Find proteins for P43528 (Escherichia coli)
Explore P43528 
Go to UniProtKB:  P43528
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.266 
  • R-Value Work: 0.191 
  • R-Value Observed: 0.191 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 105.7α = 90
b = 105.7β = 90
c = 171.6γ = 120
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
X-PLORmodel building
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

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