3J03

Lidless Mm-cpn in the closed state with ATP/AlFx


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.8 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Cryo-EM structure of a group II chaperonin in the prehydrolysis ATP-bound state leading to lid closure.

Zhang, J.Ma, B.DiMaio, F.Douglas, N.R.Joachimiak, L.A.Baker, D.Frydman, J.Levitt, M.Chiu, W.

(2011) Structure 19: 633-639

  • DOI: 10.1016/j.str.2011.03.005
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Chaperonins are large ATP-driven molecular machines that mediate cellular protein folding. Group II chaperonins use their "built-in lid" to close their central folding chamber. Here we report the structure of an archaeal group II chaperonin in its pr ...

    Chaperonins are large ATP-driven molecular machines that mediate cellular protein folding. Group II chaperonins use their "built-in lid" to close their central folding chamber. Here we report the structure of an archaeal group II chaperonin in its prehydrolysis ATP-bound state at subnanometer resolution using single particle cryo-electron microscopy (cryo-EM). Structural comparison of Mm-cpn in ATP-free, ATP-bound, and ATP-hydrolysis states reveals that ATP binding alone causes the chaperonin to close slightly with a ∼45° counterclockwise rotation of the apical domain. The subsequent ATP hydrolysis drives each subunit to rock toward the folding chamber and to close the lid completely. These motions are attributable to the local interactions of specific active site residues with the nucleotide, the tight couplings between the apical and intermediate domains within the subunit, and the aligned interactions between two subunits across the rings. This mechanism of structural changes in response to ATP is entirely different from those found in group I chaperonins.


    Related Citations: 
    • Mechanism of folding chamber closure in a group II chaperonin.
      Zhang, J.,Baker, M.L.,Schroder, G.F.,Douglas, N.R.,Reissmann, S.,Jakana, J.,Dougherty, M.,Fu, C.J.,Levitt, M.,Ludtke, S.J.,Frydman, J.,Chiu, W.
      (2010) Nature 463: 379


    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Lidless Mm-cpn
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P
491Methanococcus maripaludisMutation(s): 0 
Find proteins for Q877G8 (Methanococcus maripaludis)
Go to UniProtKB:  Q877G8
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 4.8 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-05-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2012-03-21
    Type: Database references
  • Version 1.3: 2018-07-18
    Type: Data collection