Evidence map›Paper›PMID 11916856›Full record

ArticleBiophysical journal2002

Syringomycin E channel: a lipidic pore stabilized by lipopeptide?

Valery V Malev, Ludmila V Schagina, Philip A Gurnev, Jon Y Takemoto, Ekaterina M Nestorovich, Sergey M Bezrukov

Open access · bronzeAbstract read
In one paragraph

Article in Biophysical journal, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 33 papers.

0numbers the graph read from it
0cells of the map it votes in
33citing papers in PubMed
1.8field-weighted citation impact, top 15% 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

33 citing papers in PubMed, 84 citations in OpenAlex.

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  16. Article
  17. Cyclic Lipodepsipeptides FromFrontiers in microbiology · 2018
    Review
  18. Article
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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 5 institutions in 2 countries.

Valery V MalevInstitute of Cytology, St. Petersburg, 194064, Russia.
Ludmila V Schagina
Philip A Gurnev
Jon Y Takemoto
Ekaterina M Nestorovich
Sergey M Bezrukov
Institute of Cytology · RUEunice Kennedy Shriver National Institute of Child Health and Human Development · USNational Institutes of Health · USSt Petersburg University · RUUtah State University · US

Funding

BIOPHYSICS OF MESOSCOPIC ION CHANNELSZ01HD000242 · NICHD · CHILD HEALTH AND HUMAN DEVELOPMENT · PI BEZRUKOV, SERGEY M · 1998 to 2003
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6 · The paper itself

Abstract

Highly reproducible ion channels of the lipopeptide antibiotic syringomycin E demonstrate unprecedented involvement of the host bilayer lipids. We find that in addition to a pronounced influence of lipid species on the open-channel ionic conductance, the membrane lipids play a crucial role in channel gating. The effective gating charge, which characterizes sensitivity of the conformational equilibrium of the syringomycin E channels to the transmembrane voltage, is modified by the lipid charge and lipid dipolar moment. We show that the type of host lipid determines not only the absolute value but also the sign of the gating charge. With negatively charged bilayers, the gating charge sign inverts with increased salt concentration or decreased pH. We also demonstrate that the replacement of lamellar lipid by nonlamellar with the negative spontaneous curvature inhibits channel formation. These observations suggest that the asymmetric channel directly incorporates lipids. The charges and dipoles resulting from the structural inclusion of lipids are important determinants of the overall energetics that underlies channel gating. We conclude that the syringomycin E channel may serve as a biophysical model to link studies of ion channels with those of lipidic pores in membrane fusion.

Indexed as

Anti-Bacterial AgentsCalciumCell MembraneDose-Response Relationship, DrugElectrolytesKineticsLipid BilayersLipidsPeptidesPeptides, CyclicPhosphatidylcholinesPhosphatidylethanolaminesTime Factors1,2-dioleoyl-glycero-3-phosphatidyl ethanolamine1,2-oleoylphosphatidylcholineAnti-Bacterial AgentsCalciumElectrolytesLipid BilayersLipidsPeptidesPeptides, CyclicPhosphatidylcholinesPhosphatidylethanolaminessyringomycin E

Identifiers

PMID11916856
PMCPMC1301994
OpenAlexW2005816143

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.