4A8D

DegP dodecamer with bound OMP


Experimental Data Snapshot

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

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Newly Folded Substrates Inside the Molecular Cage of the Htra Chaperone Degq

Malet, H.Canellas, F.Sawa, J.Yan, J.Thalassinos, K.Ehrmann, M.Clausen, T.Saibil, H.R.

(2012) Nat Struct Mol Biol 19: 152

  • DOI: 10.1038/nsmb.2210
  • Primary Citation of Related Structures:  
    4A8C, 4A8D, 4A8A, 4A8B, 4A9G

  • PubMed Abstract: 
  • The HtrA protein family combines chaperone and protease activities and is essential for protein quality control in many organisms. Whereas the mechanisms underlying the proteolytic function of HtrA proteins are well characterized, their chaperone activity remains poorly understood ...

    The HtrA protein family combines chaperone and protease activities and is essential for protein quality control in many organisms. Whereas the mechanisms underlying the proteolytic function of HtrA proteins are well characterized, their chaperone activity remains poorly understood. Here we describe cryo-EM structures of Escherichia coli DegQ in its 12- and 24-mer states in complex with model substrates, providing a structural model of HtrA chaperone action. Up to six lysozyme substrates bind inside the DegQ 12-mer cage and are visualized in a close-to-native state. An asymmetric reconstruction reveals the binding of a well-ordered lysozyme to four DegQ protomers. DegQ PDZ domains are located adjacent to substrate density and their presence is required for chaperone activity. The substrate-interacting regions appear conserved in 12- and 24-mer cages, suggesting a common mechanism of chaperone function.


    Related Citations: 
    • Structural Basis for the Regulated Protease and Chaperone Function of Degp.
      Krojer, T., Sawa, J., Schafer, E., Saibil, H.R., Ehrmann, M., Clausen, T.
      (2008) Nature 453: 885

    Organizational Affiliation

    Institute of Structural and Molecular Biology, Crystallography, Birkbeck College, London, UK.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PERIPLASMIC SERINE ENDOPROTEASE DEGPABCDEFGHABCDEFGHIJKL
448Escherichia coliMutation(s): 1 
EC: 3.4.21.107
Find proteins for P0C0V0 (Escherichia coli (strain K12))
Explore P0C0V0 
Go to UniProtKB:  P0C0V0
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
OUTER MEMBRANE PROTEIN C M346Escherichia coliMutation(s): 0 
Find proteins for P06996 (Escherichia coli (strain K12))
Explore P06996 
Go to UniProtKB:  P06996
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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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-01-11
    Type: Initial release
  • Version 1.1: 2012-02-15
    Changes: Other
  • Version 1.2: 2017-08-30
    Changes: Data collection, Refinement description