1AMH

UNCOMPLEXED RAT TRYPSIN MUTANT WITH ASP 189 REPLACED WITH SER (D189S)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The three-dimensional structure of Asp189Ser trypsin provides evidence for an inherent structural plasticity of the protease.

Szabo, E.Bocskei, Z.Naray-Szabo, G.Graf, L.

(1999) Eur.J.Biochem. 263: 20-26


  • PubMed Abstract: 
  • Trypsin mutant Asp189Ser, first described by Gráf et al. [Gráf, L., Jancsó, A., Szilágyi, L., Hegyi, G., Pintér, K., Náray-Szabó, G., Hepp, J., Medzihradszky, K. & Rutter, W.J. (1988) Proc. Natl Acad. Sci. USA 85, 4961-4965] has played an important r ...

    Trypsin mutant Asp189Ser, first described by Gráf et al. [Gráf, L., Jancsó, A., Szilágyi, L., Hegyi, G., Pintér, K., Náray-Szabó, G., Hepp, J., Medzihradszky, K. & Rutter, W.J. (1988) Proc. Natl Acad. Sci. USA 85, 4961-4965] has played an important role in recent studies on the structural basis of substrate-specific catalysis by serine proteases. The present work reports the three-dimensional structure of this mutant crystallized in unliganded form: the first unliganded rat trypsin structure reported. The X-ray structure of the Asp189Ser trypsin mutant in complex with bovine pancreatic trypsin inhibitor is already known. The X-ray structure of free Asp189Ser rat trypsin revealed that the single amino acid mutation at the bottom of the substrate binding pocket of trypsin resulted in extensive structural changes around the mutated site and in dimerization of the mutant, in contrast with the complexed enzyme the structure of which is practically the same as that of wild-type trypsin. The structural rearrangement in the mutant was shown to be restricted to the activation domain region providing further evidence for the allosteric property of this structural-functional unit of the enzyme. This study supports our view that the plasticity of the activation domain may play an important role in the mechanism of substrate-specific serine protease action.


    Related Citations: 
    • Electrostatic Complementarity within the Substrate-Binding Pocket of Trypsin
      Graf, L.,Jancso, A.,Szilagyi, L.,Hegyi, G.,Pinter, K.,Naray-Szabo, G.,Hepp, J.,Medzihradszky, K.,Rutter, W.J.
      (1988) Proc.Natl.Acad.Sci.USA 85: 4961
    • Exogenous Acetate Reconstitutes the Enzymatic Activity of Trypsin Asp189Ser
      Perona, J.J.,Hedstrom, L.,Wagner, R.L.,Rutter, W.J.,Craik, C.S.,Fletterick, R.J.
      (1994) Biochemistry 33: 3252
    • Structural Basis of the Activation and Action of Trypsin
      Huber, R.,Bode, W.
      (1978) Acc.Chem.Res. 11: 114


    Organizational Affiliation

    Department of Biochemistry, Eötvös L. University, Budapest, Hungary.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ANIONIC TRYPSIN
A, B
223Rattus norvegicusGene Names: Prss2 (Try2)
EC: 3.4.21.4
Find proteins for P00763 (Rattus norvegicus)
Go to UniProtKB:  P00763
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.182 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 45.920α = 90.00
b = 49.790β = 97.34
c = 89.880γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
BIOTEXdata scaling
BIOTEXdata collection
BIOTEXdata reduction
X-PLORmodel building
X-PLORrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-12-24
    Type: Initial release
  • Version 1.1: 2008-03-04
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance