Evidence map›Paper›PMID 22454493›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2012

Folding without charges.

Martin Kurnik, Linda Hedberg, Jens Danielsson, Mikael Oliveberg

Open access · bronzeAbstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 31 papers.

0numbers the graph read from it
0cells of the map it votes in
31citing papers in PubMed
2.8field-weighted citation impact, top 9% 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

31 citing papers in PubMed, 58 citations in OpenAlex.

  1. Cysteine thiol-to-sulfonate oxidation induces unfolding for the functional switching of the extracellular HMGB1 protein.Proceedings of the National Academy of Sciences of the United States of America · 2026
    Article
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  6. Dissecting the stability determinants of a challenging de novo protein fold using massively parallel design and experimentation.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  7. Physicochemical classification of organisms.Proceedings of the National Academy of Sciences of the United States of America · 2022
    Article
  8. Review
  9. Article
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  11. Article
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  15. Effects of protein size, thermodynamic stability, and net charge on cotranslational folding on the ribosome.Proceedings of the National Academy of Sciences of the United States of America · 2018
    Article
  16. Size and topology modulate the effects of frustration in protein folding.Proceedings of the National Academy of Sciences of the United States of America · 2018
    Article
  17. Review
  18. Review
  19. Physicochemical code for quinary protein interactions inProceedings of the National Academy of Sciences of the United States of America · 2017
    Article
  20. Article
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 2 institutions in 2 countries.

Martin KurnikDepartment of Biochemistry and Biophysics, Arrhenius Laboratories of Natural Sciences, Stockholm University, S-106 91 Stockholm, Sweden.
Linda Hedberg
Jens Danielsson
Mikael Oliveberg
Stockholm University · SEUniversity of California, San Diego · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Surface charges of proteins have in several cases been found to function as "structural gatekeepers," which avoid unwanted interactions by negative design, for example, in the control of protein aggregation and binding. The question is then if side-chain charges, due to their desolvation penalties, play a corresponding role in protein folding by avoiding competing, misfolded traps? To find out, we removed all 32 side-chain charges from the 101-residue protein S6 from Thermus thermophilus. The results show that the charge-depleted S6 variant not only retains its native structure and cooperative folding transition, but folds also faster than the wild-type protein. In addition, charge removal unleashes pronounced aggregation on longer timescales. S6 provides thus an example where the bias toward native contacts of a naturally evolved protein sequence is independent of charges, and point at a fundamental difference in the codes for folding and intermolecular interaction: specificity in folding is governed primarily by hydrophobic packing and hydrogen bonding, whereas solubility and binding relies critically on the interplay of side-chain charges.

Indexed as

Protein FoldingBacterial ProteinsKineticsMagnetic Resonance SpectroscopyModels, MolecularProtein StabilityProtein Structure, QuaternaryRibosomal Protein S6SolubilitySolutionsStatic ElectricityThermodynamicsThermus thermophilusBacterial ProteinsRibosomal Protein S6Solutions

Identifiers

PMID22454493
PMCPMC3326513
OpenAlexW2117731486

What OpenQuestion holds

Textmetadata
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.