1TE0

Structural analysis of DegS, a stress sensor of the bacterial periplasm


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.245 
  • R-Value Observed: 0.247 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural analysis of DegS, a stress sensor of the bacterial periplasm.

Zeth, K.

(2004) FEBS Lett 569: 351-358

  • DOI: 10.1016/j.febslet.2004.06.012
  • Primary Citation of Related Structures:  
    1TE0

  • PubMed Abstract: 
  • Regulated proteolysis is a key event in transmembrane signalling between intracellular compartments. In Escherichia coli the membrane-bound protease DegS has been identified as the periplasmic stress sensor for unfolded outer membrane proteins (OMPs) ...

    Regulated proteolysis is a key event in transmembrane signalling between intracellular compartments. In Escherichia coli the membrane-bound protease DegS has been identified as the periplasmic stress sensor for unfolded outer membrane proteins (OMPs). DegS inititates a proteolytic cascade resulting in the release of sigmaE the transcription factor of periplasmic genes. The crystal structure of DegS protease reported at 2.2 A resolution reveals a trimeric complex with the monomeric protease domain in an inhibited state followed by the inhibitory PDZ domain. Noteably, domain architecture and communication of DegS are remarkably to homologous proteins known to date. Here the domain interface is mechanically locked by three intradomain salt bridges. Co-crystallisation trials in the presence of a 10-residue activating peptide did not result in significant structural intradomain shifts nor distortions in the crystal packing. These observations imply a mode of activation indicative of peptide-induced structural shifts imposed to the protease domain rather than disturbing the PDZ-protease interface.


    Organizational Affiliation

    Department of Membrane Biochemistry, Max-Planck-Institute for Biochemistry, Am Klopferspitz 18, D-82152 Martinsried, Germany. zeth@biochem.mpg.de



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protease degSAB318Escherichia coliMutation(s): 0 
Gene Names: degShhoBhtrHb3235Z4594ECS4108
EC: 3.4.21 (PDB Primary Data), 3.4.21.107 (UniProt)
Find proteins for P0AEE3 (Escherichia coli (strain K12))
Explore P0AEE3 
Go to UniProtKB:  P0AEE3
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.245 
  • R-Value Observed: 0.247 
  • Space Group: I 2 3
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 166.28α = 90
b = 166.28β = 90
c = 166.28γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
XDSdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2004-11-30
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Derived calculations, Version format compliance