Evidence map›Paper›PMID 26619265›Full record

ArticleNature structural & molecular biology2016

Substrate protein folds while it is bound to the ATP-independent chaperone Spy.

Frederick Stull, Philipp Koldewey, Julia R Humes, Sheena E Radford, James C A Bardwell

Abstract read
In one paragraph

Article in Nature structural & molecular biology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers.

0numbers the graph read from it
0cells of the map it votes in
53citing 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

53 citing papers in PubMed.

  1. Article
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  6. Making Proteins with Electricity.Reviews of physiology, biochemistry and pharmacology · 2025
    Review
  7. Review
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  9. Article
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  19. Article
  20. Stress-Responsive Periplasmic Chaperones in Bacteria.Frontiers in molecular biosciences · 2021
    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

5 authors.

Frederick Stull *Department of Molecular, Cellular and Developmental Biology, and the Howard Hughes Medical Institute, University of Michigan, Ann Arbor, Michigan, USA.
Philipp Koldewey *Department of Molecular, Cellular and Developmental Biology, and the Howard Hughes Medical Institute, University of Michigan, Ann Arbor, Michigan, USA.
Julia R HumesAstbury Centre for Structural and Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds, UK.
Sheena E RadfordAstbury Centre for Structural and Molecular Biology, School of Molecular and Cellular Biology, University of Leeds, Leeds, UK.
James C A BardwellDepartment of Molecular, Cellular and Developmental Biology, and the Howard Hughes Medical Institute, University of Michigan, Ann Arbor, Michigan, USA.

Funding

Mechanism of an Acid Activated ChaperoneR01GM102829 · NIGMS · UNIVERSITY OF MICHIGAN AT ANN ARBOR · PI BARDWELL, JAMES, JAKOB, URSULA H. · 2013 to 2016
$1.8M
Howard Hughes Medical InstituteNIGMS NIH HHS GM102829NIGMS NIH HHS R01 GM102829
6 · The paper itself

Abstract

Chaperones assist in the folding of many proteins in the cell. Although the most well-studied chaperones use cycles of ATP binding and hydrolysis to assist in protein folding, a number of chaperones have been identified that promote folding in the absence of high-energy cofactors. Precisely how ATP-independent chaperones accomplish this feat is unclear. Here we characterized the kinetic mechanism of substrate folding by the small ATP-independent chaperone Spy from Escherichia coli. Spy rapidly associates with its substrate, immunity protein 7 (Im7), thereby eliminating Im7's potential for aggregation. Remarkably, Spy then allows Im7 to fully fold into its native state while it remains bound to the surface of the chaperone. These results establish a potentially widespread mechanism whereby ATP-independent chaperones assist in protein refolding. They also provide compelling evidence that substrate proteins can fold while being continuously bound to a chaperone.

Indexed as

Protein FoldingCarrier ProteinsEscherichia coliEscherichia coli ProteinsKineticsMolecular ChaperonesPeriplasmic ProteinsProtein BindingCarrier ProteinsE colicin-binding immunity protein Im7, E coliEscherichia coli ProteinsMolecular ChaperonesPeriplasmic ProteinsSpy protein, E coli

Identifiers

PMID26619265
PMCPMC4847750

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Registered trials

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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.