1KY9

Crystal Structure of DegP (HtrA)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.226 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Crystal structure of DegP (HtrA) reveals a new protease-chaperone machine.

Krojer, T.Garrido-Franco, M.Huber, R.Ehrmann, M.Clausen, T.

(2002) Nature 416: 455-459

  • DOI: 10.1038/416455a
  • Primary Citation of Related Structures:  
    1KY9

  • PubMed Abstract: 
  • Molecular chaperones and proteases monitor the folded state of other proteins. In addition to recognizing non-native conformations, these quality control factors distinguish substrates that can be refolded from those that need to be degraded. To investigate the molecular basis of this process, we have solved the crystal structure of DegP (also known as HtrA), a widely conserved heat shock protein that combines refolding and proteolytic activities ...

    Molecular chaperones and proteases monitor the folded state of other proteins. In addition to recognizing non-native conformations, these quality control factors distinguish substrates that can be refolded from those that need to be degraded. To investigate the molecular basis of this process, we have solved the crystal structure of DegP (also known as HtrA), a widely conserved heat shock protein that combines refolding and proteolytic activities. The DegP hexamer is formed by staggered association of trimeric rings. The proteolytic sites are located in a central cavity that is only accessible laterally. The mobile side-walls are constructed by twelve PDZ domains, which mediate the opening and closing of the particle and probably the initial binding of substrate. The inner cavity is lined by several hydrophobic patches that may act as docking sites for unfolded polypeptides. In the chaperone conformation, the protease domain of DegP exists in an inactive state, in which substrate binding in addition to catalysis is abolished.


    Organizational Affiliation

    Max-Planck-Institut für Biochemie, Abteilung Strukturforschung, Am Klopferspitz 18A, 82152 Martinsried, Germany.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PROTEASE DO AB448Escherichia coliMutation(s): 15 
Gene Names: degP
EC: 3.4.21 (PDB Primary Data), 3.4.21.107 (UniProt)
Find proteins for P0C0V0 (Escherichia coli (strain K12))
Explore P0C0V0 
Go to UniProtKB:  P0C0V0
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A,BL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.80 Å
  • R-Value Free: 0.275 
  • R-Value Work: 0.218 
  • R-Value Observed: 0.226 
  • Space Group: P 63 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 121.374α = 90
b = 121.374β = 90
c = 233.667γ = 120
Software Package:
Software NamePurpose
SHARPphasing
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2002-04-03
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance