1TE0

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.245 

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
  • Also Cited By: 4RQY

  • 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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protease degS
A, B
318Escherichia coli (strain K12)Mutation(s): 0 
Gene Names: degS (hhoB, htrH)
EC: 3.4.21.107
Find proteins for P0AEE3 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AEE3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.295 
  • R-Value Work: 0.245 
  • Space Group: I 2 3
Unit Cell:
Length (Å)Angle (°)
a = 166.280α = 90.00
b = 166.280β = 90.00
c = 166.280γ = 90.00
Software Package:
Software NamePurpose
XDSdata scaling
PHASERphasing
XDSdata reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

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