Evidence map›Paper›PMID 24081985›Full record

ArticleThe Journal of general physiology2013

Molecular dynamics simulations of membrane proteins under asymmetric ionic concentrations.

Fatemeh Khalili-Araghi, Brigitte Ziervogel, James C Gumbart, Benoît Roux

Abstract read
In one paragraph

Article in The Journal of general physiology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers.

0numbers the graph read from it
0cells of the map it votes in
28citing 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

28 citing papers in PubMed.

  1. Article
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  16. Dual Resolution Membrane Simulations Using Virtual Sites.The journal of physical chemistry. B · 2020
    Article
  17. Review
  18. Review
  19. Article
  20. Ion-triggered selectivity in bacterial sodium channels.Proceedings of the National Academy of Sciences of the United States of America · 2018
    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

4 authors.

Fatemeh Khalili-AraghiDepartment of Biochemistry and Molecular Biology, Gordon Center for Integrative Science, The University of Chicago, Chicago, IL 60637.
Brigitte Ziervogel
James C Gumbart
Benoît Roux

Funding

Synthetic Antigen Binder CoreU54GM087519 · NIGMS · UNIVERSITY OF CHICAGO · PI NAKAMOTO, ROBERT K. · 2010 to 2017
$31.9M
Molecular And Cellular Biology Training ProgramT32GM007183 · NIGMS · UNIVERSITY OF CHICAGO · PI GLICK, BENJAMIN S, RICE, PHOEBE A · 1985 to 2021
$23.9M
Computational Studies of Ion Channels - Resubmission 01R01GM062342 · NIGMS · WEILL MEDICAL COLLEGE OF CORNELL UNIV · PI ROUX, BENOIT · 2001 to 2022
$8.7M
COMBATING INFECTION THROUGH ATOMIC-SCALE MODELING OF UNIQUE BACTERIAL SYSTEMSK22AI100927 · NIAID · GEORGIA INSTITUTE OF TECHNOLOGY · PI GUMBART, JAMES C. · 2013 to 2014
$269k
NIAID NIH HHS K22 AI100927NIAID NIH HHS K22-AI100927NIGMS NIH HHS R01 GM062342NIGMS NIH HHS R01-GM062342NIGMS NIH HHS T32 GM007183NIGMS NIH HHS U54 GM087519NIGMS NIH HHS U54-GM087519
6 · The paper itself

Abstract

A computational method is developed to allow molecular dynamics simulations of biomembrane systems under realistic ionic gradients and asymmetric salt concentrations while maintaining the conventional periodic boundary conditions required to minimize finite-size effects in an all-atom explicit solvent representation. The method, which consists of introducing a nonperiodic energy step acting on the ionic species at the edge of the simulation cell, is first tested with illustrative applications to a simple membrane slab model and a phospholipid membrane bilayer. The nonperiodic energy-step method is then used to calculate the reversal potential of the bacterial porin OmpF, a large cation-specific β-barrel channel, by simulating the I-V curve under an asymmetric 10:1 KCl concentration gradient. The calculated reversal potential of 28.6 mV is found to be in excellent agreement with the values of 26-27 mV measured from lipid bilayer experiments, thereby demonstrating that the method allows realistic simulations of nonequilibrium membrane transport with quantitative accuracy. As a final example, the pore domain of Kv1.2, a highly selective voltage-activated K(+) channel, is simulated in a lipid bilayer under conditions that recreate, for the first time, the physiological K(+) and Na(+) concentration gradients and the electrostatic potential difference of living cells.

Indexed as

Molecular Dynamics SimulationAction PotentialsAmino Acid SequenceAnimalsKv1.2 Potassium ChannelLipid BilayersMolecular Sequence DataPorinsPotassiumSodiumKv1.2 Potassium ChannelLipid BilayersOmpF proteinPorinsPotassiumSodium

Identifiers

PMID24081985
PMCPMC3787774

What OpenQuestion holds

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LicenceCC BY-NC-SA
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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.