Evidence map›Paper›PMID 25083874›Full record

ArticleCell2014

Stochastic but highly coordinated protein unfolding and translocation by the ClpXP proteolytic machine.

Juan Carlos Cordova, Adrian O Olivares, Yongdae Shin, Benjamin M Stinson, Stephane Calmat, Karl R Schmitz, Marie-Eve Aubin-Tam, Tania A Baker, Matthew J Lang, Robert T Sauer

Open access · bronzeAbstract read
In one paragraph

Article in Cell, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 87 papers.

0numbers the graph read from it
0cells of the map it votes in
87citing papers in PubMed
9.5field-weighted citation impact, top 1% 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

87 citing papers in PubMed, 143 citations in OpenAlex.

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  14. A proteolytic AAA+ machine poised to unfold a protein substrate.bioRxiv : the preprint server for biology · 2023
    Article
  15. Article
  16. Review
  17. Visualization of the Cdc48 AAA+ ATPase protein unfolding pathway.bioRxiv : the preprint server for biology · 2023
    Article
  18. Review
  19. Article
  20. Article

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

4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

10 authors at 4 institutions in 2 countries.

Juan Carlos CordovaDepartment of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235, USA.
Adrian O OlivaresDepartment of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Yongdae ShinDepartment of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Benjamin M StinsonDepartment of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Stephane CalmatDepartment of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Karl R SchmitzDepartment of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Marie-Eve Aubin-TamDepartment of Bionanoscience, Kavli Institute of Nanoscience, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, the Netherlands.
Tania A BakerDepartment of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA; Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Matthew J LangDepartment of Chemical and Biomolecular Engineering, Vanderbilt University, Nashville, TN 37235, USA; Department of Molecular Physiology and Biophysics, Vanderbilt University School of Medicine, Nashville, TN 37235, USA. Electronic address: matt.lang@vanderbilt.edu.
Robert T SauerDepartment of Biology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA. Electronic address: bobsauer@mit.edu.
Massachusetts Institute of Technology · USHoward Hughes Medical Institute · USVanderbilt University · USDelft University of Technology · NL

Funding

Sequence Determinants of Protein Structure and StabilityR01GM101988 · NIGMS · MASSACHUSETTS INSTITUTE OF TECHNOLOGY · PI SAUER, ROBERT T · 2012 to 2019
$3.5M
Howard Hughes Medical InstituteNIGMS NIH HHS GM-101988NIGMS NIH HHS R01 GM101988
6 · The paper itself

Abstract

ClpXP and other AAA+ proteases recognize, mechanically unfold, and translocate target proteins into a chamber for proteolysis. It is not known whether these remarkable molecular machines operate by a stochastic or sequential mechanism or how power strokes relate to the ATP-hydrolysis cycle. Single-molecule optical trapping allows ClpXP unfolding to be directly visualized and reveals translocation steps of ∼1-4 nm in length, but how these activities relate to solution degradation and the physical properties of substrate proteins remains unclear. By studying single-molecule degradation using different multidomain substrates and ClpXP variants, we answer many of these questions and provide evidence for stochastic unfolding and translocation. We also present a mechanochemical model that accounts for single-molecule, biochemical, and structural results for our observation of enzymatic memory in translocation stepping, for the kinetics of translocation steps of different sizes, and for probabilistic but highly coordinated subunit activity within the ClpX ring.

Indexed as

Adenosine TriphosphateEndopeptidase ClpEscherichia coli ProteinsModels, MolecularProtein Structure, TertiaryProtein UnfoldingProteolysisAdenosine TriphosphateClpP protease, E coliClpP protein, humanCLPX protein, humanEndopeptidase ClpEscherichia coli Proteins

Identifiers

PMID25083874
PMCPMC4134808
OpenAlexW2108065606

What OpenQuestion holds

Textmetadata
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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.