4A0V

model refined against the Symmetry-free cryo-EM map of TRiC-AMP-PNP


Experimental Data Snapshot

  • Method: ELECTRON MICROSCOPY
  • Resolution: 10.7 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

Symmetry-Free Cryo-Em Structures of the Chaperonin Tric Along its ATPase-Driven Conformational Cycle.

Cong, Y.Schroder, G.F.Meyer, A.S.Jakana, J.Ma, B.Dougherty, M.T.Schmid, M.F.Reissmann, S.Levitt, M.Ludtke, S.L.Frydman, J.Chiu, W.

(2012) Embo J. 31: 720

  • DOI: 10.1038/emboj.2011.366
  • Primary Citation of Related Structures:  4A0O, 4A0W, 4A13

  • PubMed Abstract: 
  • The eukaryotic group II chaperonin TRiC/CCT is a 16-subunit complex with eight distinct but similar subunits arranged in two stacked rings. Substrate folding inside the central chamber is triggered by ATP hydrolysis. We present five cryo-EM structure ...

    The eukaryotic group II chaperonin TRiC/CCT is a 16-subunit complex with eight distinct but similar subunits arranged in two stacked rings. Substrate folding inside the central chamber is triggered by ATP hydrolysis. We present five cryo-EM structures of TRiC in apo and nucleotide-induced states without imposing symmetry during the 3D reconstruction. These structures reveal the intra- and inter-ring subunit interaction pattern changes during the ATPase cycle. In the apo state, the subunit arrangement in each ring is highly asymmetric, whereas all nucleotide-containing states tend to be more symmetrical. We identify and structurally characterize an one-ring closed intermediate induced by ATP hydrolysis wherein the closed TRiC ring exhibits an observable chamber expansion. This likely represents the physiological substrate folding state. Our structural results suggest mechanisms for inter-ring-negative cooperativity, intra-ring-positive cooperativity, and protein-folding chamber closure of TRiC. Intriguingly, these mechanisms are different from other group I and II chaperonins despite their similar architecture.


    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
T-COMPLEX PROTEIN 1 SUBUNIT BETA
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P
513Bos taurusGene Names: CCT2
Find proteins for Q3ZBH0 (Bos taurus)
Go to Gene View: CCT2
Go to UniProtKB:  Q3ZBH0
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON MICROSCOPY
  • Resolution: 10.7 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: 2012-02-15
    Type: Initial release
  • Version 1.1: 2013-03-20
    Type: Other
  • Version 1.2: 2015-08-12
    Type: Database references
  • Version 1.3: 2017-04-19
    Type: Other