1ETN

MOLECULAR STRUCTURE OF THE TOXIC DOMAIN OF HEAT-STABLE ENTEROTOXIN PRODUCED BY A PATHOGENIC STRAIN OF ESCHERICHIA COLI


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.89 Å
  • R-Value Work: 0.088 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

Literature

Molecular structure of the toxin domain of heat-stable enterotoxin produced by a pathogenic strain of Escherichia coli. A putative binding site for a binding protein on rat intestinal epithelial cell membranes.

Ozaki, H.Sato, T.Kubota, H.Hata, Y.Katsube, Y.Shimonishi, Y.

(1991) J.Biol.Chem. 266: 5934-5941


  • PubMed Abstract: 
  • Heat-stable enterotoxins are a family of toxin peptides that are produced by enterotoxigenic Escherichia coli and consist of 18 and 19 amino acid residues (Aimoto, S., Takao, T., Shimonishi, Y., Hara, S., Takeda, T., Takeda, Y., and Miwatani, T. (198 ...

    Heat-stable enterotoxins are a family of toxin peptides that are produced by enterotoxigenic Escherichia coli and consist of 18 and 19 amino acid residues (Aimoto, S., Takao, T., Shimonishi, Y., Hara, S., Takeda, T., Takeda, Y., and Miwatani, T. (1982) Eur. J. Biochem. 129, 257-263). A synthetic fully toxic analog of the enterotoxin, Mpr5-STp(5-17), where Mpr is beta-mercaptopropionic acid and which consists of 13 amino acid residues from Cys5 to Cys17 in a heat-stable enterotoxin but is deaminated at its N terminus (Kubota, H., Hidaka, Y., Ozaki, H., Ito, H., Hirayama, T., Takeda, Y., and Shimonishi, Y. (1989) Biochem. Biophys. Res. Commun. 161, 229-235), has been crystalized from water, and its crystal structure has been solved by a direct method and refined by least square procedures to give an R factor of 0.089. The crystal belongs to the orthorhombic space group P2(1)2(1)2(1) with unit cell constants a = 21.010 (2) A, b = 27.621 (4) A, and c = 12.781 (1) A. The asymmetric unit of the crystals contains one peptide molecule with 13 water molecules. A right-hand spiral peptide backbone extends throughout the molecule. Three beta-turns are located along this spiral and fixed tightly by three intramolecular disulfide linkages. The actual structure predicts the biniding region on the enterotoxin to the receptor protein on the membrane of rat intestinal epithelial cells.


    Related Citations: 
    • Structure-Activity Relationship of Escherichia Coli Heat-Stable Enterotoxin: Role of Ala Residue at Position 14 in Toxin-Receptor Interaction
      Yamasaki, S.,Sato, T.,Hidaka, Y.,Ozaki, H.,Ito, H.,Hirayama, T.,Takeda, Y.,Sugimura, T.,Tai, A.,Shimonishi, Y.
      (1990) Bull.Chem.Soc.Jpn. 63: 2063
    • Essential Structure for Full Enterotoxigenic Activity of Heat-Stable Enterotoxin Produced by Enterotoxigenic Escherichia Coli
      Yoshimura, S.,Ikemura, H.,Watanabe, H.,Aimoto, H.,Shimonishi, Y.,Hara, S.,Takeda, T.,Miwatani, T.,Takeda, Y.
      (1985) FEBS Lett. 181: 138
    • Structural Characteristics for Biological Activity of Heat-Stable Enterotoxin Produced by Enterotoxigenic Escherichia Coli: X-Ray Crystallography of Weakly Toxic and Nontoxic Analogs
      Sato, T.,Ozaki, H.,Hata, Y.,Kitagawa, Y.,Katsube, Y.,Shimonishi, Y.
      (1994) Biochemistry 33: 8641
    • Semi-Preparative Purification and Crystallization of Synthetic Analogs of Heat-Stable Enterotoxin of Enterotoxigenic Escherichia Coli
      Sato, T.,Ito, H.,Takeda, Y.,Shimonishi, Y.
      (1992) Bull.Chem.Soc.Jpn. 65: 938


    Organizational Affiliation

    Institute for Protein Research, Osaka University, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
5-BETA-MERCAPTOPROPIONATE HEAT-STABLE ENTEROTOXIN
A
13Escherichia coliGene Names: sta1
Find proteins for P01559 (Escherichia coli)
Go to UniProtKB:  P01559
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MPR
Query on MPR
A
NON-POLYMERC3 H6 O S

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 0.89 Å
  • R-Value Work: 0.088 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 21.010α = 90.00
b = 27.621β = 90.00
c = 12.781γ = 90.00
Software Package:
Software NamePurpose
FMLS/VPrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-01-29
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2013-06-19
    Type: Other
  • Version 1.4: 2017-11-29
    Type: Derived calculations, Other