Evidence map›Paper›PMID 34624315›Full record

ReviewThe Journal of biological chemistry2021

The interactions of molecular chaperones with client proteins: why are they so weak?

Taylor Arhar, Arielle Shkedi, Cory M Nadel, Jason E Gestwicki

Abstract readReview
In one paragraph

Review in The Journal of biological chemistry, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 32 papers.

0numbers the graph read from it
0cells of the map it votes in
32citing papers in PubMed
–field-weighted citation impact
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

32 citing papers in PubMed.

  1. Article
  2. Article
  3. Dynamic disorder is crucial for mitochondrial protein import.Protein science : a publication of the Protein Society · 2026
    Review
  4. Review
  5. Article
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  14. Review
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  17. Article
  18. Article
  19. Article
  20. Chaperone Activators.Sub-cellular biochemistry · 2024
    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

4 authors.

Taylor ArharDepartment of Pharmaceutical Chemistry and the Institute for Neurodegenerative Disease, University of California San Francisco, San Francisco California, USA.
Arielle ShkediDepartment of Pharmaceutical Chemistry and the Institute for Neurodegenerative Disease, University of California San Francisco, San Francisco California, USA.
Cory M NadelDepartment of Pharmaceutical Chemistry and the Institute for Neurodegenerative Disease, University of California San Francisco, San Francisco California, USA.
Jason E GestwickiDepartment of Pharmaceutical Chemistry and the Institute for Neurodegenerative Disease, University of California San Francisco, San Francisco California, USA. Electronic address: jason.gestwicki@ucsf.edu.

Funding

Molecular Chaperones and Small MoleculesR01NS059690 · NINDS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI Jason E Gestwicki · 2008 to 2026
$7.9M
PHARMACEUTICAL SCIENCES AND PHARMACOGENOMICST32GM007175 · NIGMS · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI AHITUV, NADAV, KROETZ, DEANNA L · 1985 to 2021
$7.1M
Probing the Role of Chaperone-TPR Complexes in Tau ProteostasisRF1AG068125 · NIA · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI CRAIK, CHARLES SCOTT, GESTWICKI, JASON E · 2020 to 2020
$2.2M
NIA NIH HHS RF1 AG068125NIGMS NIH HHS T32 GM007175NINDS NIH HHS R01 NS059690
6 · The paper itself

Abstract

The major classes of molecular chaperones have highly variable sequences, sizes, and shapes, yet they all bind to unfolded proteins, limit their aggregation, and assist in their folding. Despite the central importance of this process to protein homeostasis, it has not been clear exactly how chaperones guide this process or whether the diverse families of chaperones use similar mechanisms. For the first time, recent advances in NMR spectroscopy have enabled detailed studies of how unfolded, "client" proteins interact with both ATP-dependent and ATP-independent classes of chaperones. Here, we review examples from four distinct chaperones, Spy, Trigger Factor, DnaK, and HscA-HscB, highlighting the similarities and differences between their mechanisms. One striking similarity is that the chaperones all bind weakly to their clients, such that the chaperone-client interactions are readily outcompeted by stronger, intra- and intermolecular contacts in the folded state. Thus, the relatively weak affinity of these interactions seems to provide directionality to the folding process. However, there are also key differences, especially in the details of how the chaperones release clients and how ATP cycling impacts that process. For example, Spy releases clients in a largely folded state, while clients seem to be unfolded upon release from Trigger Factor or DnaK. Together, these studies are beginning to uncover the similarities and differences in how chaperones use weak interactions to guide protein folding.

Indexed as

Protein FoldingHumansMolecular ChaperonesProtein BindingProtein ConformationMolecular Chaperoneschaperonenuclear magnetic resonance (NMR)protein aggregationprotein foldingprotein–protein interactions (PPIs)

Identifiers

PMID34624315
PMCPMC8567204

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.