Evidence map›Paper›PMID 31953415›Full record

ArticleNature communications2020

Bacterial Hsp70 resolves misfolded states and accelerates productive folding of a multi-domain protein.

Rahmi Imamoglu, David Balchin, Manajit Hayer-Hartl, F Ulrich Hartl

Open access · goldAbstract read
In one paragraph

Article in Nature communications, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 77 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
77citing papers in PubMed, 1 pooled it
7.9field-weighted citation impact, top 2% 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

77 citing papers in PubMed, 1 synthesis or guideline pooled it, 151 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Review
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  5. Review
  6. Article
  7. Mechanisms and regulation of the Hsp70 chaperone network.Nature reviews. Molecular cell biology · 2026
    Review
  8. Origin of class B J-domain proteins involved in amyloid transactions.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
  9. Article
  10. Article
  11. Article
  12. Review
  13. Article
  14. Trigger factor accelerates nascent chain compaction and folding.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  15. Article
  16. Article
  17. Review
  18. Review
  19. Article
  20. Article

17 more citing papers are in PubMed but not listed here.

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

4 authors at 1 institution in 1 country.

Rahmi ImamogluMax Planck Institute of Biochemistry, Department of Cellular Biochemistry, Martinsried, Germany.ORCID http://orcid.org/0000-0002-7695-8317
David BalchinMax Planck Institute of Biochemistry, Department of Cellular Biochemistry, Martinsried, Germany. balchin@biochem.mpg.de.ORCID http://orcid.org/0000-0002-5000-0995
Manajit Hayer-HartlMax Planck Institute of Biochemistry, Department of Cellular Biochemistry, Martinsried, Germany. mhartl@biochem.mpg.de.ORCID http://orcid.org/0000-0001-8213-6742
F Ulrich HartlMax Planck Institute of Biochemistry, Department of Cellular Biochemistry, Martinsried, Germany. uhartl@biochem.mpg.de.ORCID http://orcid.org/0000-0002-7941-135X
Max Planck Institute of Biochemistry · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The ATP-dependent Hsp70 chaperones (DnaK in E. coli) mediate protein folding in cooperation with J proteins and nucleotide exchange factors (E. coli DnaJ and GrpE, respectively). The Hsp70 system prevents protein aggregation and increases folding yields. Whether it also enhances the rate of folding remains unclear. Here we show that DnaK/DnaJ/GrpE accelerate the folding of the multi-domain protein firefly luciferase (FLuc) ~20-fold over the rate of spontaneous folding measured in the absence of aggregation. Analysis by single-pair FRET and hydrogen/deuterium exchange identified inter-domain misfolding as the cause of slow folding. DnaK binding expands the misfolded region and thereby resolves the kinetically-trapped intermediates, with folding occurring upon GrpE-mediated release. In each round of release DnaK commits a fraction of FLuc to fast folding, circumventing misfolding. We suggest that by resolving misfolding and accelerating productive folding, the bacterial Hsp70 system can maintain proteins in their native states under otherwise denaturing stress conditions.

Indexed as

Protein DomainsProtein FoldingAnimalsBinding SitesEscherichia coliEscherichia coli ProteinsFirefliesHeat-Shock ProteinsHSP40 Heat-Shock ProteinsHSP70 Heat-Shock ProteinsKineticsLuciferases, FireflyModels, MolecularMolecular ChaperonesProtein ConformationDnaJ protein, E colidnaK protein, E coliEscherichia coli ProteinsGrpE protein, E coliHeat-Shock ProteinsHSP40 Heat-Shock ProteinsHSP70 Heat-Shock ProteinsLuciferases, FireflyMolecular Chaperones

Identifiers

PMID31953415
PMCPMC6969021
OpenAlexW2999551925

What OpenQuestion holds

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LicenceCC BY
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.