Evidence map›Paper›PMID 24013077›Full record

ArticleJournal of molecular biology2014

The extracellular protein VlsE is destabilized inside cells.

Irisbel Guzman, Hannah Gelman, Jonathan Tai, Martin Gruebele

Abstract read
In one paragraph

Article in Journal of molecular biology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 34 papers.

0numbers the graph read from it
0cells of the map it votes in
34citing papers in PubMed
5.2field-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

34 citing papers in PubMed, 81 citations in OpenAlex.

  1. Review
  2. Crowding-induced stabilization and destabilization in a single protein.Protein science : a publication of the Protein Society · 2025
    Article
  3. Article
  4. Article
  5. Article
  6. In-cell destabilization of a homodimeric protein complex detected by DEER spectroscopy.Proceedings of the National Academy of Sciences of the United States of America · 2020
    Article
  7. An in vitro mimic of in-cell solvation for protein folding studies.Protein science : a publication of the Protein Society · 2020
    Article
  8. Article
  9. Proteins: "Boil 'Em, Mash 'Em, Stick 'Em in a Stew".The journal of physical chemistry. B · 2019
    Review
  10. Article
  11. Article
  12. A small single-domain protein folds through the same pathway on and off the ribosome.Proceedings of the National Academy of Sciences of the United States of America · 2018
    Article
  13. Review
  14. Review
  15. Article
  16. Quinary interactions with an unfolded state ensemble.Protein science : a publication of the Protein Society · 2017
    Article
  17. Article
  18. Physicochemical code for quinary protein interactions inProceedings of the National Academy of Sciences of the United States of America · 2017
    Article
  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

4 authors at 1 institution in 1 country.

Irisbel GuzmanDepartment of Biochemistry, University of Illinois, Urbana, IL 61801, USA.
Hannah GelmanDepartment of Physics, University of Illinois, Urbana, IL 61801, USA.
Jonathan TaiDepartment of Biochemistry, University of Illinois, Urbana, IL 61801, USA.
Martin GruebeleCenter for Biophysics and Computational Biology, University of Illinois, Urbana, IL 61801, USA; Department of Chemistry, University of Illinois, Urbana, IL 61801, USA; Department of Physics, University of Illinois, Urbana, IL 61801, USA. Electronic address: mgruebel@illinois.edu.
University of Illinois Urbana-Champaign · US

Funding

Training Program in Chemistry-Interface with BiologyT32GM070421 · NIGMS · UNIVERSITY OF ILLINOIS URBANA-CHAMPAIGN · PI HERGENROTHER, PAUL · 2005 to 2019
$5.4M
NIGMS NIH HHS T32 GM070421
6 · The paper itself

Abstract

We use U2OS cells as in vivo "test tubes" to study how the same cytoplasmic environment has opposite effects on the stability of two different proteins. Protein folding stability and kinetics were compared by fast relaxation imaging, which combines a temperature jump with fluorescence microscopy of FRET (Förster resonance energy transfer)-labeled proteins. While the stability of the cytoplasmic enzyme PGK (phosphoglycerate kinase) increases in cells, the stability of the cell surface antigen VlsE, which presumably did not evolve for stability inside cells, decreases. VlsE folding also slows down more than PGK folding in cells, relative to their respective aqueous buffer kinetics. Our FRET measurements provide evidence that VlsE is more compact inside cells than in aqueous buffer. Two kinetically distinct protein populations exist inside cells, making a connection with previous in vitro crowding studies. In addition, we confirm previous studies showing that VlsE is stabilized by 150mg/mL of the carbohydrate crowder Ficoll, even though it is destabilized in the cytoplasm relative to aqueous buffer. We propose two mechanisms for the observed destabilization of VlsE in U2OS cells: long-range interactions competing with crowding or shape-dependent crowding favoring more compact states inside the cell over the elongated aqueous buffer native state.

Indexed as

Antigens, BacterialBacterial ProteinsCell LineCytosolFluorescence Resonance Energy TransferHumansLipoproteinsPhosphoglycerate KinaseProtein FoldingProtein StabilityTemperatureAntigens, BacterialBacterial ProteinsLipoproteinsPhosphoglycerate KinaseVlsE protein, Borrelia burgdorferiextracellular proteinfast relaxation imaging (FReI)fluorescence resonance energy transfer (FRET)protein foldingvariable major protein-like sequence expressed (VlsE)

Identifiers

PMID24013077
PMCPMC4059009
OpenAlexW2026369792

What OpenQuestion holds

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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.