3ZQ0

Visualizing GroEL-ES in the Act of Encapsulating a Non-Native Substrate Protein


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Visualizing Groel/Es in the Act of Encapsulating a Folding Protein

Chen, D.-H.Madan, D.Weaver, J.Lin, Z.Schroder, G.F.Chiu, W.Rye, H.S.

(2013) Cell 153: 1354

  • DOI: 10.1016/j.cell.2013.04.052
  • Primary Citation of Related Structures:  
    3ZPZ, 3ZQ0, 3ZQ1

  • PubMed Abstract: 
  • The GroEL/ES chaperonin system is required for the assisted folding of many proteins. How these substrate proteins are encapsulated within the GroEL-GroES cavity is poorly understood. Using symmetry-free, single-particle cryo-electron microscopy, we have characterized a chemically modified mutant of GroEL (EL43Py) that is trapped at a normally transient stage of substrate protein encapsulation ...

    The GroEL/ES chaperonin system is required for the assisted folding of many proteins. How these substrate proteins are encapsulated within the GroEL-GroES cavity is poorly understood. Using symmetry-free, single-particle cryo-electron microscopy, we have characterized a chemically modified mutant of GroEL (EL43Py) that is trapped at a normally transient stage of substrate protein encapsulation. We show that the symmetric pattern of the GroEL subunits is broken as the GroEL cis-ring apical domains reorient to accommodate the simultaneous binding of GroES and an incompletely folded substrate protein (RuBisCO). The collapsed RuBisCO folding intermediate binds to the lower segment of two apical domains, as well as to the normally unstructured GroEL C-terminal tails. A comparative structural analysis suggests that the allosteric transitions leading to substrate protein release and folding involve concerted shifts of GroES and the GroEL apical domains and C-terminal tails.


    Organizational Affiliation

    Verna and Marrs McLean Department of Biochemistry and Molecular Biology, National Center for Macromolecular Imaging, Baylor College of Medicine, Houston, TX 77030, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
60 KDA CHAPERONIN
A, B, C, D, E, F, G, H
A, B, C, D, E, F, G, H, I, J, K, L, M, N
524Escherichia coli BL21Mutation(s): 0 
UniProt
Find proteins for P0A6F5 (Escherichia coli (strain K12))
Explore P0A6F5 
Go to UniProtKB:  P0A6F5
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
10 KDA CHAPERONINO, P, Q, R, S, T, U97Escherichia coli K-12Mutation(s): 0 
Gene Names: groSgroESmopBb4142JW4102
UniProt
Find proteins for P0A6F9 (Escherichia coli (strain K12))
Explore P0A6F9 
Go to UniProtKB:  P0A6F9
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 9.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-06-19
    Type: Initial release
  • Version 1.1: 2017-08-23
    Changes: Data collection, Refinement description