2ZLE

Cryo-EM structure of DegP12/OMP

Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 28.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.2 of the entry. See complete history. 


Literature

Structural basis for the regulated protease and chaperone function of DegP

Krojer, T., Sawa, J., Saibil, H.R., Ehrmann, M., Clausen, T.

(2008) Nature 453: 885-890

  • DOI: 10.1038/nature07004
  • Primary Citation of Related Structures:  
    2ZLE, 3CS0

  • PubMed Abstract: 

    • All organisms have to monitor the folding state of cellular proteins precisely. The heat-shock protein DegP is a protein quality control factor in the bacterial envelope that is involved in eliminating misfolded proteins and in the biogenesis of outer-membrane proteins ...

    All organisms have to monitor the folding state of cellular proteins precisely. The heat-shock protein DegP is a protein quality control factor in the bacterial envelope that is involved in eliminating misfolded proteins and in the biogenesis of outer-membrane proteins. Here we describe the molecular mechanisms underlying the regulated protease and chaperone function of DegP from Escherichia coli. We show that binding of misfolded proteins transforms hexameric DegP into large, catalytically active 12-meric and 24-meric multimers. A structural analysis of these particles revealed that DegP represents a protein packaging device whose central compartment is adaptable to the size and concentration of substrate. Moreover, the inner cavity serves antagonistic functions. Whereas the encapsulation of folded protomers of outer-membrane proteins is protective and might allow safe transit through the periplasm, misfolded proteins are eliminated in the molecular reaction chamber. Oligomer reassembly and concomitant activation on substrate binding may also be critical in regulating other HtrA proteases implicated in protein-folding diseases.

    Organizational Affiliation: 

    Research Institute for Molecular Pathology - IMP, Dr Bohrgasse 7, A-1030 Vienna, Austria.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Protease do
A, B, C, E, F, G, H, I, J, K, L, M
A, B, C, E, F, G, H, I, J, K, L, M
448Escherichia coliMutation(s): 0 
Gene Names: degP, htrA, ptd
EC: 3.4.21 (PDB Primary Data), 3.4.21.107 (UniProt)
Membrane Entity: Yes 
UniProt
Find proteins for P0C0V0 (Escherichia coli (strain K12))
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Go to UniProtKB:  P0C0V0
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP0C0V0
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Outer membrane protein CD346Escherichia coliMutation(s): 0 
Gene Names: ompC, meoA, par
Membrane Entity: Yes 
UniProt
Find proteins for P06996 (Escherichia coli (strain K12))
Explore P06996 
Go to UniProtKB:  P06996
Entity Groups  
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UniProt GroupP06996
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 28.0 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

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View more in-depth experimental data

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-06-03
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2017-02-08
    Changes: Other