Evidence map›Paper›PMID 17968536›Full record

ArticleEuropean biophysics journal : EBJ2008

Effect of divalent cations on the structure of the antibiotic daptomycin.

Steven W Ho, David Jung, Jennifer R Calhoun, James D Lear, Mark Okon, Walter R P Scott, Robert E W Hancock, Suzana K Straus

Abstract read
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In one paragraph

Article in European biophysics journal : EBJ, 2008. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 52 papers.

0numbers the graph read from it
0cells of the map it votes in
52citing papers in PubMed
2.1field-weighted citation impact, top 14% 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

52 citing papers in PubMed, 113 citations in OpenAlex.

  1. Article
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  7. Understanding the selectivityFrontiers in bioinformatics · 2025
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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

8 authors at 2 institutions in 2 countries.

Steven W HoDepartment of Chemistry, University of British Columbia, 2036 Main Mall, Vancouver, BC, Canada.
David Jung
Jennifer R Calhoun
James D Lear
Mark Okon
Walter R P Scott
Robert E W Hancock
Suzana K Straus
University of British Columbia · CAUniversity of Pennsylvania · US

Funding

XRAY CRYSTALLOGRAPHIC STRUCTURE ANALYSIS: PROTEIN SORTINGP41RR001081 · NCRR · UNIVERSITY OF CALIFORNIA, SAN FRANCISCO · PI FERRIN, THOMAS E · 1985 to 2011
$17.6M
BIOORGANIC MODELS FOR TRANSMEMBRANE PROTEINSR01GM060610 · NIGMS · UNIVERSITY OF PENNSYLVANIA · PI DEGRADO, WILLIAM · 2000 to 2009
$2.2M
NCRR NIH HHS P41 RR-01081NIGMS NIH HHS GM60610
6 · The paper itself

Abstract

Daptomycin, a cyclic anionic lipopeptide antibiotic, whose three-dimensional structure was recently solved using solution state NMR (Ball et al. 2004; Jung et al. 2004; Rotondi and Gierasch 2005), requires calcium for function. To date, the exact nature of the interaction between divalent cations, such as Ca(2+) or Mg(2+), has not been fully characterized. It has, however, been suggested that addition of Ca(2+) to daptomycin in a 1:1 molar ratio induces aggregation. Moreover, it has been suggested that certain residues, e.g. Asp3 and Asp7, which are essential for activity (Grunewald et al. 2004; Kopp et al. 2006), may also be important for Ca(2+) binding (Jung et al. 2004). In this work, we have tried: (1) to further pinpoint how Ca(2+) affects daptomycin structure/oligomerization using analytical ultracentrifugation; and (2) to determine whether a specific calcium binding site exists, based on one-dimensional (13)C NMR spectra and molecular dynamics (MD) simulations. The centrifugation results indicated that daptomycin formed micelles of between 14 and 16 monomers in the presence of a 1:1 molar ratio of Ca(2+) and daptomycin. The (13)C NMR data indicated that addition of calcium had a significant effect on the Trp1 and Kyn13 residues, indicating that either calcium binds in this region or that these residues may be important for oligomerization. Finally, the molecular dynamics simulation results indicated that the conformational change of daptomycin upon calcium binding might not be as significant as originally proposed. Similar studies on the divalent cation Mg(2+) are also presented. The implication of these results for the biological function of daptomycin is discussed.

Indexed as

Cations, DivalentAlgorithmsAnti-Infective AgentsBinding SitesCalciumComputer SimulationDaptomycinMagnesiumMagnetic Resonance SpectroscopyMicellesModels, StatisticalMolecular ConformationPeptidesProtein ConformationUltracentrifugationAnti-Infective AgentsCalciumCations, DivalentDaptomycinMagnesiumMicellesPeptides

Identifiers

PMID17968536
OpenAlexW2169308762

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.