1E8N

PROLYL OLIGOPEPTIDASE FROM PORCINE BRAIN, MUTANT, COMPLEXED WITH PEPTIDE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.192 

wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structures of Prolyl Oligopeptidase Substrate/ Inhibitor Complexes. Use of Inhibitor Binding for Titration of the Catalytic Histidine Residue

Fulop, V.Szeltner, Z.Renner, V.Polgar, L.

(2001) J Biol Chem 276: 1262

  • DOI: 10.1074/jbc.M007003200
  • Primary Citation of Related Structures:  
    1E8M, 1E8N

  • PubMed Abstract: 
  • Structure determination of the inactive S554A variant of prolyl oligopeptidase complexed with an octapeptide has shown that substrate binding is restricted to the P4-P2' region. In addition, it has revealed a hydrogen bond network of potential catalytic importance not detected in other serine peptidases ...

    Structure determination of the inactive S554A variant of prolyl oligopeptidase complexed with an octapeptide has shown that substrate binding is restricted to the P4-P2' region. In addition, it has revealed a hydrogen bond network of potential catalytic importance not detected in other serine peptidases. This involves a unique intramolecular hydrogen bond between the P1' amide and P2 carbonyl groups and another between the P2' amide and Nepsilon2 of the catalytic histidine 680 residue. It is argued that both hydrogen bonds promote proton transfer from the imidazolium ion to the leaving group. Another complex formed with the product-like inhibitor benzyloxycarbonyl-glycyl-proline, indicating that the carboxyl group of the inhibitor forms a hydrogen bond with the Nepsilon2 of His(680). Because a protonated histidine makes a stronger interaction with the carboxyl group, it offers a possibility of the determination of the real pK(a) of the catalytic histidine residue. This was found to be 6.25, lower than that of the well studied serine proteases. The new titration method gave a single pK(a) for prolyl oligopeptidase, whose reaction exhibited a complex pH dependence for k(cat)/K(m), and indicated that the observed pK(a) values are apparent. The procedure presented may be applicable for other serine peptidases.


    Related Citations: 
    • Catalysis of Serine Oligopeptidases is Controlled by a Gating Filter Mechanism
      Fulop, V., Szeltner, Z., Polgar, L.
      (2000) EMBO Rep 1: 277
    • Prolyl Oligopeptidase: An Unusual Beta-Propeller Domain Regulates Proteolysis
      Fulop, V., Bocskei, Z., Polgar, L.
      (1998) Cell 94: 161

    Organizational Affiliation

    Department of Biological Sciences, University of Warwick, Gibbet Hill Road, Coventry CV4 7AL, United Kingdom.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROLYL ENDOPEPTIDASEA710Sus scrofaMutation(s): 1 
Gene Names: PREP
EC: 3.4.21.26
UniProt
Find proteins for P23687 (Sus scrofa)
Explore P23687 
Go to UniProtKB:  P23687
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
PEPTIDE INHIBITORB [auth I]9synthetic constructMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.50 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.192 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 70.7α = 90
b = 99.7β = 90
c = 110.7γ = 90
Software Package:
Software NamePurpose
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 2000-09-27 
  • Released Date: 2001-01-16 
  • Deposition Author(s): Fulop, V.

Revision History  (Full details and data files)

  • Version 1.0: 2001-01-16
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
  • Version 1.2: 2016-12-28
    Changes: Source and taxonomy
  • Version 1.3: 2019-07-24
    Changes: Data collection, Derived calculations