Evidence map›Paper›PMID 20734112›Full record

ArticleJournal of biomolecular NMR2010

Optimizing ¹⁹F NMR protein spectroscopy by fractional biosynthetic labeling.

Julianne L Kitevski-LeBlanc, Ferenc Evanics, R Scott Prosser

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Article in Journal of biomolecular NMR, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.

0numbers the graph read from it
0cells of the map it votes in
12citing 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

12 citing papers in PubMed.

  1. Article
  2. Article
  3. Development of a single cultureJournal of fluorine chemistry · 2022
    Article
  4. Article
  5. Beilstein journal of organic chemistry · 2021
    Review
  6. Article
  7. SAR by (Protein-Observed)Accounts of chemical research · 2019
    Review
  8. Article
  9. AromaticNature methods · 2019
    Article
  10. Selective Radical Trifluoromethylation of Native Residues in Proteins.Journal of the American Chemical Society · 2018
    Article
  11. Glycoconjugate journal · 2017
    Article
  12. 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

3 authors.

Julianne L Kitevski-LeBlancDepartment of Chemistry, University of Toronto, UTM, 3359 Mississauga Rd., North Mississauga, ON L5L1C6, Canada.
Ferenc Evanics
R Scott Prosser

Funding

Canadian Institutes of Health Research
6 · The paper itself

Abstract

In protein NMR experiments which employ nonnative labeling, incomplete enrichment is often associated with inhomogeneous line broadening due to the presence of multiple labeled species. We investigate the merits of fractional enrichment strategies using a monofluorinated phenylalanine species, where resolution is dramatically improved over that achieved by complete enrichment. In NMR studies of calmodulin, a 148 residue calcium binding protein, ¹⁹F and ¹H-¹⁵N HSQC spectra reveal a significant extent of line broadening and the appearance of minor conformers in the presence of complete (>95%) 3-fluorophenylalanine labeling. The effects of varying levels of enrichment of 3-fluorophenylalanine (i.e. between 3 and >95%) were further studied by ¹⁹F and ¹H-¹⁵N HSQC spectra, ¹⁵N T(1) and T(2) relaxation measurements, ¹⁹F T(2) relaxation, translational diffusion and heat denaturation experiments via circular dichroism. Our results show that while several properties, including translational diffusion and thermal stability show little variation between non-fluorinated and >95% ¹⁹F labeled samples, ¹⁹F and ¹H-¹⁵N HSQC spectra show significant improvements in line widths and resolution at or below 76% enrichment. Moreover, high levels of fluorination (>80%) appear to increase protein disorder as evidenced by backbone ¹⁵N dynamics. In this study, reasonable signal to noise can be achieved between 60-76% ¹⁹F enrichment, without any detectable perturbations from labeling.

Indexed as

AnimalsCalmodulinFluorine CompoundsIsotope LabelingMolecular Dynamics SimulationNitrogen IsotopesNuclear Magnetic Resonance, BiomolecularPhenylalanineProtein StabilityXenopus Proteins3-fluorophenylalanineCalmodulinFluorine CompoundsNitrogen IsotopesPhenylalanineXenopus Proteins

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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.