3MH4

HtrA proteases are activated by a conserved mechanism that can be triggered by distinct molecular cues


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.257 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

HtrA proteases have a conserved activation mechanism that can be triggered by distinct molecular cues

Krojer, T.Sawa, J.Huber, R.Clausen, T.

(2010) Nat.Struct.Mol.Biol. 17: 844-852

  • DOI: 10.1038/nsmb.1840
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • HtrA proteases are tightly regulated proteolytic assemblies that are essential for maintaining protein homeostasis in extracytosolic compartments. Though HtrA proteases have been characterized in detail, their precise molecular mechanism for switchin ...

    HtrA proteases are tightly regulated proteolytic assemblies that are essential for maintaining protein homeostasis in extracytosolic compartments. Though HtrA proteases have been characterized in detail, their precise molecular mechanism for switching between different functional states is still unknown. To address this, we carried out biochemical and structural studies of DegP from Escherichia coli. We show that effector-peptide binding to the PDZ domain of DegP induces oligomer conversion from resting hexameric DegP6 into proteolytically active 12-mers and 24-mers (DegP12/24). Moreover, our data demonstrate that a specific protease loop (L3) functions as a conserved molecular switch of HtrA proteases. L3 senses the activation signal-that is, the repositioned PDZ domain of substrate-engaged DegP12/24 or the binding of allosteric effectors to regulatory HtrA proteases such as DegS-and transmits this information to the active site. Implications for protein quality control and regulation of oligomeric enzymes are discussed.


    Organizational Affiliation

    Research Institute of Molecular Pathology, Vienna, Austria.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Protease do
A, B
456Escherichia coli (strain K12)Mutation(s): 1 
Gene Names: degP (htrA, ptd)
EC: 3.4.21.107
Find proteins for P0C0V0 (Escherichia coli (strain K12))
Go to UniProtKB:  P0C0V0
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.1 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.257 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 120.708α = 90.00
b = 120.708β = 90.00
c = 232.984γ = 120.00
Software Package:
Software NamePurpose
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing
CNSrefinement
DNAdata collection
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-06-30
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2014-03-05
    Type: Database references