2BKL

Structural and Mechanistic Analysis of Two Prolyl Endopeptidases: Role of Inter-Domain Dynamics in Catalysis and Specificity


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.160 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural and Mechanistic Analysis of Two Prolyl Endopeptidases: Role of Interdomain Dynamics in Catalysis and Specificity

Shan, L.Mathews, I.I.Khosla, C.

(2005) Proc.Natl.Acad.Sci.USA 102: 3599

  • DOI: 10.1073/pnas.0408286102
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Prolyl endopeptidases (PEPs) are a unique class of serine proteases with considerable therapeutic potential for the treatment of celiac sprue. The crystal structures of two didomain PEPs have been solved in alternative configurations, thereby providi ...

    Prolyl endopeptidases (PEPs) are a unique class of serine proteases with considerable therapeutic potential for the treatment of celiac sprue. The crystal structures of two didomain PEPs have been solved in alternative configurations, thereby providing insights into the mode of action of these enzymes. The structure of the Sphingomonas capsulata PEP, solved and refined to 1.8-A resolution, revealed an open configuration of the active site. In contrast, the inhibitor-bound PEP from Myxococcus xanthus was crystallized (1.5-A resolution) in a closed form. Comparative analysis of the two structures highlights a critical role for the domain interface in regulating interdomain dynamics and substrate specificity. Structure-based mutagenesis of the M. xanthus PEP confirms an important role for several interfacial residues. A salt bridge between Arg-572 and Asp-196/Glu-197 appears to act as a latch for opening or closing the didomain enzyme, and Arg-572 and Ile-575 may also help secure the incoming peptide substrate to the open form of the enzyme. Arg-618 and Asp-145 are responsible for anchoring the invariant proline residue in the active site of this postproline-cleaving enzyme. A model is proposed for the docking of a representative substrate PQPQLPYPQPQLP in the active site, where the N-terminal substrate residues interact extensively with the catalytic domain, and the C-terminal residues stretch into the propeller domain. Given the promise of the M. xanthus PEP as an oral therapeutic enzyme for treating celiac sprue, our results provide a strong foundation for further optimization of the PEP's clinically useful features.


    Related Citations: 
    • The Prolyl Oligopeptidase Family
      Polgar, L.
      (2002) Cell.Mol.Life.Sci. 59: 349
    • Comparative Biochemical Analysis of Three Bacterial Prolyl Endopeptidases: Implications for Celiac Sprue
      Shan, L.,Marti, T.,Sollid, L.M.,Gray, G.M.,Khosla, C.
      (2004) Biochem.J. 383: 311
    • Structural Basis for Gluten Intolerance in Celiac Sprue
      Shan, L.,Molberg, O.,Parrot, I.,Hausch, F.,Filiz, F.,Gray, G.M.,Sollid, L.M.,Khosla, C.
      (2002) Science 297: 2275


    Organizational Affiliation

    Department of Chemical Engineering, Stanford University, Stanford, CA 94305, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
PROLYL ENDOPEPTIDASE
A, B
695Myxococcus xanthusMutation(s): 0 
Gene Names: pep
Find proteins for Q9X5N2 (Myxococcus xanthus)
Go to UniProtKB:  Q9X5N2
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
A
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
ZAH
Query on ZAH

Download SDF File 
Download CCD File 
A, B
N-[(BENZYLOXY)CARBONYL]-L-ALANYL-L-PROLINE
Z-ALA PROLINAL
C16 H20 N2 O5
RSSOZTMMMIWOJB-AAEUAGOBSA-N
 Ligand Interaction
MES
Query on MES

Download SDF File 
Download CCD File 
A, B
2-(N-MORPHOLINO)-ETHANESULFONIC ACID
C6 H13 N O4 S
SXGZJKUKBWWHRA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.5 Å
  • R-Value Free: 0.182 
  • R-Value Work: 0.160 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 65.692α = 90.00
b = 114.718β = 103.60
c = 99.279γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
REFMACrefinement
HKL-2000data reduction
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2005-03-09
    Type: Initial release
  • Version 1.1: 2011-05-08
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance