Evidence map›Paper›PMID 11775737›Full record

ArticleJournal of biomolecular NMR2001

Membrane-bound structure and alignment of the antimicrobial beta-sheet peptide gramicidin S derived from angular and distance constraints by solid state 19F-NMR.

J Salgado, S L Grage, L H Kondejewski, R S Hodges, R N McElhaney, A S Ulrich

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Article in Journal of biomolecular NMR, 2001. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 38 papers.

0numbers the graph read from it
0cells of the map it votes in
38citing papers in PubMed
3.1field-weighted citation impact, top 8% 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

38 citing papers in PubMed, 120 citations in OpenAlex.

  1. Probing theRSC chemical biology · 2026
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  2. Determination of accurateJournal of magnetic resonance (San Diego, Calif. : 1997) · 2022
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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

6 authors at 2 institutions in 2 countries.

J SalgadoDepartment of Molecular Biology, University of Jena, Germany.
S L Grage
L H Kondejewski
R S Hodges
R N McElhaney
A S Ulrich
Friedrich Schiller University Jena · DEUniversity of Alberta · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The antimicrobial properties of the cyclic beta-sheet peptide gramicidin S are attributed to its destabilizing effect on lipid membranes. Here we present the membrane-bound structure and alignment of a derivative of this peptide, based on angular and distance constraints. Solid-state 19F-NMR was used to study a 19F-labelled gramicidin S analogue in dimyristoylphosphatidylcholine bilayers at a lipid:peptide ratio of 80:1 and above. Two equivalent leucine side chains were replaced by the non-natural amino acid 4F-phenylglycine, which serves as a highly sensitive reporter on the structure and dynamics of the peptide backbone. Using a modified CPMG multipulse sequence, the distance between the two 19F-labels was measured from their homonuclear dipolar coupling as 6 A. in good agreement with the known backbone structure of natural gramicidin S in solution. By analyzing the anisotropic chemical shift of the 19F-labels in macroscopically oriented membrane samples, we determined the alignment of the peptide in the bilayer and described its temperature-dependent mobility. In the gel phase, the 19F-labelled gramicidin S is aligned symmetrically with respect to the membrane normal, i.e., with its cyclic beta-sheet backbone lying flat in the plane of the bilayer, which is fully consistent with its amphiphilic character. Upon raising the temperature to the liquid crystalline state, a considerable narrowing of the 19F-NMR chemical shift dispersion is observed, which is attributed the onset of global rotation of the peptide and further wobbling motions. This study demonstrates the potential of the 19F nucleus to describe suitably labelled polypeptides in membranes, requiring only little material and short NMR acquisition times.

Indexed as

Anti-Bacterial AgentsBacteriaCell MembraneCircular DichroismDimyristoylphosphatidylcholineFluorineGramicidinLipid BilayersMembrane ProteinsMicrobial Sensitivity TestsModels, MolecularNuclear Magnetic Resonance, BiomolecularProtein Structure, SecondaryProtein Structure, TertiaryAnti-Bacterial AgentsDimyristoylphosphatidylcholineFluorineGramicidinLipid BilayersMembrane Proteins

Identifiers

PMID11775737
OpenAlexW2416883710

What OpenQuestion holds

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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.