Evidence map›Paper›PMID 20573955›Full record

ArticleThe Journal of biological chemistry2010

Crystal structures of a group II chaperonin reveal the open and closed states associated with the protein folding cycle.

Jose H Pereira, Corie Y Ralston, Nicholai R Douglas, Daniel Meyer, Kelly M Knee, Daniel R Goulet, Jonathan A King, Judith Frydman, Paul D Adams

Open access · hybridAbstract read
In one paragraph

Article in The Journal of biological chemistry, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers.

0numbers the graph read from it
0cells of the map it votes in
41citing papers in PubMed
4.7field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

41 citing papers in PubMed, 74 citations in OpenAlex.

  1. CryoEM Strategies for Elucidating the Closed State Architecture of CCT.Methods in molecular biology (Clifton, N.J.) · 2026
    Article
  2. Article
  3. Article
  4. Article
  5. Article
  6. Chaperonins: Nanocarriers with Biotechnological Applications.Nanomaterials (Basel, Switzerland) · 2021
    Review
  7. Article
  8. An ensemble of cryo-EM structures of TRiC reveal its conformational landscape and subunit specificity.Proceedings of the National Academy of Sciences of the United States of America · 2019
    Article
  9. Review
  10. Article
  11. Intraring allostery controls the function and assembly of a hetero-oligomeric class II chaperonin.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2018
    Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Structural biology in antiviral drug discovery.Current opinion in pharmacology · 2016
    Review
  19. Article
  20. Review
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

9 authors at 4 institutions in 1 country.

Jose H PereiraPhysical Biosciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
Corie Y Ralston
Nicholai R Douglas
Daniel Meyer
Kelly M Knee
Daniel R Goulet
Jonathan A King
Judith Frydman
Paul D Adams
Massachusetts Institute of Technology · USStanford University · USLawrence Berkeley National Laboratory · USUniversity of California, Berkeley · US

Funding

Center for Protein Folding Machinery (RMI)PN2EY016525 · NEI · BAYLOR COLLEGE OF MEDICINE · PI CHIU, WAH · 2005 to 2015
$33.6M
Howard Hughes Medical InstituteNEI NIH HHS 2PN2EY016525NEI NIH HHS PN2 EY016525
6 · The paper itself

Abstract

Chaperonins are large protein complexes consisting of two stacked multisubunit rings, which open and close in an ATP-dependent manner to create a protected environment for protein folding. Here, we describe the first crystal structure of a group II chaperonin in an open conformation. We have obtained structures of the archaeal chaperonin from Methanococcus maripaludis in both a peptide acceptor (open) state and a protein folding (closed) state. In contrast with group I chaperonins, in which the equatorial domains share a similar conformation between the open and closed states and the largest motions occurs at the intermediate and apical domains, the three domains of the archaeal chaperonin subunit reorient as a single rigid body. The large rotation observed from the open state to the closed state results in a 65% decrease of the folding chamber volume and creates a highly hydrophilic surface inside the cage. These results suggest a completely distinct closing mechanism in the group II chaperonins as compared with the group I chaperonins.

Indexed as

Protein FoldingAdenosine TriphosphateCrystallography, X-RayGroup II ChaperoninsHydrolysisMethanococcusModels, MolecularProtein Structure, TertiaryAdenosine TriphosphateGroup II Chaperonins

Identifiers

PMID20573955
PMCPMC2934662
OpenAlexW2122967365

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.