3IUJ

apPEP_WT2 opened state


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Induced-fit mechanism for prolyl endopeptidase

Li, M.Chen, C.Davies, D.R.Chiu, T.K.

(2010) J Biol Chem 285: 21487-21495

  • DOI: 10.1074/jbc.M109.092692
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Prolyl peptidases cleave proteins at proline residues and are of importance for cancer, neurological function, and type II diabetes. Prolyl endopeptidase (PEP) cleaves neuropeptides and is a drug target for neuropsychiatric diseases such as post-trau ...

    Prolyl peptidases cleave proteins at proline residues and are of importance for cancer, neurological function, and type II diabetes. Prolyl endopeptidase (PEP) cleaves neuropeptides and is a drug target for neuropsychiatric diseases such as post-traumatic stress disorder, depression, and schizophrenia. Previous structural analyses showing little differences between native and substrate-bound structures have suggested a lock-and-key catalytic mechanism. We now directly demonstrate from seven structures of Aeromonus punctata PEP that the mechanism is instead induced fit: the native enzyme exists in a conformationally flexible opened state with a large interdomain opening between the beta-propeller and alpha/beta-hydrolase domains; addition of substrate to preformed native crystals induces a large scale conformational change into a closed state with induced-fit adjustments of the active site, and inhibition of this conformational change prevents substrate binding. Absolute sequence conservation among 28 orthologs of residues at the active site and critical residues at the interdomain interface indicates that this mechanism is conserved in all PEPs. This finding has immediate implications for the use of conformationally targeted drug design to improve specificity of inhibition against this family of proline-specific serine proteases.


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, Louisiana State University Health Sciences Center, New Orleans, Louisiana 70112, USA.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Prolyl endopeptidaseA693Aeromonas caviaeMutation(s): 0 
Gene Names: prolyl endopeptidase
Find proteins for Q9X6R4 (Aeromonas caviae)
Explore Q9X6R4 
Go to UniProtKB:  Q9X6R4
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
AL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.80 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.181 
  • R-Value Observed: 0.181 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.64α = 90
b = 85.131β = 90
c = 148.17γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SHELXmodel building
ARPmodel building
CNSrefinement
HKL-2000data reduction
HKL-2000data scaling
SHELXphasing

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

  • Deposited Date: 2009-08-31 
  • Released Date: 2010-05-05 
  • Deposition Author(s): Chiu, T.K.

Revision History 

  • Version 1.0: 2010-05-05
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-11-01
    Changes: Refinement description