2FZS

Crystal structure of E. coli ClpP with a Peptide Chloromethyl Ketone Covalently Bound at the Active Site


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.173 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure at 1.9A of E. coli ClpP with a peptide covalently bound at the active site.

Szyk, A.Maurizi, M.R.

(2006) J.Struct.Biol. 156: 165-174

  • DOI: 10.1016/j.jsb.2006.03.013

  • PubMed Abstract: 
  • ClpP, the proteolytic component of the ATP-dependent ClpAP and ClpXP chaperone/protease complexes, has 14 identical subunits organized in two stacked heptameric rings. The active sites are in an interior aqueous chamber accessible through axial chann ...

    ClpP, the proteolytic component of the ATP-dependent ClpAP and ClpXP chaperone/protease complexes, has 14 identical subunits organized in two stacked heptameric rings. The active sites are in an interior aqueous chamber accessible through axial channels. We have determined a 1.9 A crystal structure of Escherichia coli ClpP with benzyloxycarbonyl-leucyltyrosine chloromethyl ketone (Z-LY-CMK) bound at each active site. The complex mimics a tetrahedral intermediate during peptide cleavage, with the inhibitor covalently linked to the active site residues, Ser97 and His122. Binding is further stabilized by six hydrogen bonds between backbone atoms of the peptide and ClpP as well as by hydrophobic binding of the phenolic ring of tyrosine in the S1 pocket. The peptide portion of Z-LY-CMK displaces three water molecules in the native enzyme resulting in little change in the conformation of the peptide binding groove. The heptameric rings of ClpP-CMK are slightly more compact than in native ClpP, but overall structural changes were minimal (rmsd approximately 0.5 A). The side chain of Ser97 is rotated approximately 90 degrees in forming the covalent adduct with Z-LY-CMK, indicating that rearrangement of the active site residues to a active configuration occurs upon substrate binding. The N-terminal peptide of ClpP-CMK is stabilized in a beta-hairpin conformation with the proximal N-terminal residues lining the axial channel and the loop extending beyond the apical surface of the heptameric ring. The lack of major substrate-induced conformational changes suggests that changes in ClpP structure needed to facilitate substrate entry or product release must be limited to rigid body motions affecting subunit packing or contacts between ClpP rings.


    Organizational Affiliation

    Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
ATP-dependent Clp protease proteolytic subunit
A, B, C, D, E, F, G, H, I, J, K, L, M, N
193Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: clpP (lopP)
EC: 3.4.21.92
Find proteins for P0A6G7 (Escherichia coli (strain K12))
Go to UniProtKB:  P0A6G7
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download SDF File 
Download CCD File 
A, B, C, F, G, H, K, L, N
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
PGE
Query on PGE

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J, K, L, M, N
TRIETHYLENE GLYCOL
C6 H14 O4
ZIBGPFATKBEMQZ-UHFFFAOYSA-N
 Ligand Interaction
CMQ
Query on CMQ

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G, H, I, J, K, L, M, N
N~2~-[(BENZYLOXY)CARBONYL]-N-[(1S,2S)-2-HYDROXY-1-(4-HYDROXYBENZYL)PROPYL]-L-LEUCINAMIDE
C24 H32 N2 O5
ZUWYQZGBCBSHFK-HSQYWUDLSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.233 
  • R-Value Work: 0.173 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 190.700α = 90.00
b = 101.000β = 99.00
c = 155.400γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
HKL-2000data reduction
REFMACrefinement
AMoREphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-05-23
    Type: Initial release
  • Version 1.1: 2008-05-01
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance