Mm-cpn wildtype with ATP

Experimental Data Snapshot

  • Resolution: 7.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 

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This is version 1.3 of the entry. See complete history


Dual Action of ATP Hydrolysis Couples Lid Closure to Substrate Release into the Group II Chaperonin Chamber.

Douglas, N.R.Reissmann, S.Zhang, J.Chen, B.Jakana, J.Kumar, R.Chiu, W.Frydman, J.

(2011) Cell 144: 240-252

  • DOI: https://doi.org/10.1016/j.cell.2010.12.017
  • Primary Citation of Related Structures:  
    3IZH, 3IZI, 3IZJ, 3IZK, 3IZL, 3IZM, 3IZN

  • PubMed Abstract: 

    Group II chaperonins are ATP-dependent ring-shaped complexes that bind nonnative polypeptides and facilitate protein folding in archaea and eukaryotes. A built-in lid encapsulates substrate proteins within the central chaperonin chamber. Here, we describe the fate of the substrate during the nucleotide cycle of group II chaperonins. The chaperonin substrate-binding sites are exposed, and the lid is open in both the ATP-free and ATP-bound prehydrolysis states. ATP hydrolysis has a dual function in the folding cycle, triggering both lid closure and substrate release into the central chamber. Notably, substrate release can occur in the absence of a lid, and lid closure can occur without substrate release. However, productive folding requires both events, so that the polypeptide is released into the confined space of the closed chamber where it folds. Our results show that ATP hydrolysis coordinates the structural and functional determinants that trigger productive folding.

  • Organizational Affiliation

    Department of Biology, Stanford University, Stanford, CA 94305-5020, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P
513Methanococcus maripaludisMutation(s): 0 
Gene Names: hsp60MMP1515
Find proteins for Q877G8 (Methanococcus maripaludis)
Explore Q877G8 
Go to UniProtKB:  Q877G8
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ877G8
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 7.20 Å
  • Aggregation State: PARTICLE 
  • Reconstruction Method: SINGLE PARTICLE 
EM Software:
TaskSoftware PackageVersion

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2011-02-02
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2018-07-18
    Changes: Data collection
  • Version 1.3: 2024-02-21
    Changes: Data collection, Database references