1H9I

COMPLEX OF EETI-II MUTANT WITH PORCINE TRYPSIN


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.175 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of Ecballium Elaterium Trypsin Inhibitor II (Eeti-II): A Rigid Molecular Scaffold

Kraetzner, R.Debreczeni, J.E.Pape, T.Schneider, T.R.Wentzel, A.Kolmar, H.Sheldrick, G.M.Uson, I.

(2005) Acta Crystallogr.,Sect.D 61: 1255

  • DOI: 10.1107/S0907444905021207
  • Primary Citation of Related Structures:  1H9H, 1W7Z

  • PubMed Abstract: 
  • The Ecballium elaterium trypsin inhibitor II (EETI-II) belongs to the family of squash inhibitors and is one of the strongest inhibitors known for trypsin. The eight independent molecules of EETI-II in the crystal structure reported here provide a go ...

    The Ecballium elaterium trypsin inhibitor II (EETI-II) belongs to the family of squash inhibitors and is one of the strongest inhibitors known for trypsin. The eight independent molecules of EETI-II in the crystal structure reported here provide a good opportunity to test the hypothesis that this small cystine-knot protein (knottin) is sufficiently rigid to be used as a molecular scaffold for protein-engineering purposes. To extend this test, the structures of two complexes of EETI-II with trypsin have also been determined, one carrying a four-amino-acid mutation of EETI-II. The remarkable similarity of these structures confirms the rigidity of the molecular framework and hence its suitability as a molecular scaffold.


    Related Citations: 
    • Sequence Requirements of the Gpng Beta-Turn of the Ecballium Elaterium Trypsin Inhibitor II Explored by Combinatorial Library Screening
      Wentzel, A.,Christmann, A.,Kraetzner, R.,Kolmar, H.
      (1999) J.Biol.Chem. 274: 21037
    • Use of Restrained Molecular Dynamics in Water to Determine Three-Dimensional Protein Structure: Prediction of the Three-Dimensional Structure of Ecballium Elaterium Trypsin Inhibitor II
      Chiche, L.,Gaboriaud, C.,Heitz, A.,Mornon, J.P.,Castro, B.,Kollman, P.A.
      (1989) Proteins: Struct.,Funct., Genet. 6: 405
    • Min-21 and Min-23, the Smallest Peptides that Fold Like a Cystine-Stabilized Beta-Sheet Motif: Design, Solution Structure, and Thermal Stability
      Heitz, A.,Le-Nguyen, D.,Chiche, L.
      (1999) Biochemistry 38: 10615


    Organizational Affiliation

    Lehrstuhl für Strukturchemie, Georg-August-Universität Göttingen, Tammannstrasse 4, D37077 Göttingen, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
TRYPSIN
E
223Sus scrofaEC: 3.4.21.4
Find proteins for P00761 (Sus scrofa)
Go to UniProtKB:  P00761
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
TRYPSIN INHIBITOR II
I
36Ecballium elateriumN/A
Find proteins for P12071 (Ecballium elaterium)
Go to UniProtKB:  P12071
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
E
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.175 
  • Space Group: I 4
Unit Cell:
Length (Å)Angle (°)
a = 139.862α = 90.00
b = 139.862β = 90.00
c = 33.667γ = 90.00
Software Package:
Software NamePurpose
SHELXL-97refinement
SCALEPACKdata scaling
DENZOdata reduction
EPMRphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-07-26
    Type: Initial release
  • Version 1.1: 2011-05-07
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance