Evidence map›Paper›PMID 23284170›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2013

High-pressure NMR reveals close similarity between cold and alcohol protein denaturation in ubiquitin.

Navratna Vajpai, Lydia Nisius, Maciej Wiktor, Stephan Grzesiek

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

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25citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

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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

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3 · Its place in the literature

Who cites it

25 citing papers in PubMed.

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  13. Study of protein folding under native conditions by rapidly switching the hydrostatic pressure inside an NMR sample cell.Proceedings of the National Academy of Sciences of the United States of America · 2018
    Article
  14. Article
  15. Computational investigation of cold denaturation in the Trp-cage miniprotein.Proceedings of the National Academy of Sciences of the United States of America · 2016
    Article
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4 · The record

Corrections and comments

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5 · Who and what money

Authors and funding

4 authors.

Navratna VajpaiFocal Area Structural Biology and Biophysics, Biozentrum, University of Basel, 4056 Basel, Switzerland.
Lydia Nisius
Maciej Wiktor
Stephan Grzesiek

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Proteins denature not only at high, but also at low temperature as well as high pressure. These denatured states are not easily accessible for experiment, because usually heat denaturation causes aggregation, whereas cold or pressure denaturation occurs at temperatures well below the freezing point of water or pressures above 5 kbar, respectively. Here we have obtained atomic details of the pressure-assisted, cold-denatured state of ubiquitin at 2,500 bar and 258 K by high-resolution NMR techniques. Under these conditions, a folded, native-like and a disordered state exist in slow exchange. Secondary chemical shifts show that the disordered state has structural propensities for a native-like N-terminal β-hairpin and α-helix and a nonnative C-terminal α-helix. These propensities are very similar to the previously described alcohol-denatured (A-)state. Similar to the A-state, (15)N relaxation data indicate that the secondary structure elements move as independent segments. The close similarity of pressure-assisted, cold-denatured, and alcohol-denatured states with native and nonnative secondary elements supports a hierarchical mechanism of folding and supports the notion that similar to alcohol, pressure and cold reduce the hydrophobic effect. Indeed, at nondenaturing concentrations of methanol, a complete transition from the native to the A-state can be achieved at ambient temperature by varying the pressure from 1 to 2,500 bar. The methanol-assisted pressure transition is completely reversible and can also be induced in protein G. This method should allow highly detailed studies of protein-folding transitions in a continuous and reversible manner.

Indexed as

Protein DenaturationProtein UnfoldingCold TemperatureEthanolHumansKineticsMagnetic Resonance SpectroscopyMethanolModels, MolecularPressureProtein Structure, SecondaryProtein Structure, TertiaryThermodynamicsUbiquitinEthanolMethanolUbiquitin

Identifiers

PMID23284170
PMCPMC3562818

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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.