Evidence map›Paper›PMID 16533838›Full record

ArticleBiophysical journal2006

Molecular simulation study of structural and dynamic properties of mixed DPPC/DPPE bilayers.

Sukit Leekumjorn, Amadeu K Sum

Abstract read
In one paragraph

Article in Biophysical journal, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 39 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
39citing papers in PubMed, 1 pooled it
–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

39 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Article
  3. Article
  4. Susceptibility ofMolecules (Basel, Switzerland) · 2024
    Article
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  13. Review
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  16. Molecular dynamics modeling of Pseudomonas aeruginosa outer membranes.Physical chemistry chemical physics : PCCP · 2018
    Article
  17. Article
  18. Article
  19. Article
  20. Three-Dimensional Microphase Separation and Synergistic Permeability in Stacked Lipid-Polymer Hybrid Membranes.Chemistry of materials : a publication of the American Chemical Society · 2017
    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

2 authors.

Sukit LeekumjornDepartment of Chemical Engineering, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA.
Amadeu K Sum

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Molecular dynamics simulations have been used to study structural and dynamic properties of fully hydrated mixed 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) and 1,2-dipalmitoyl-sn-glycero-3-phosphoethanolamine (DPPE) bilayers at 0, 25, 50, 75, and 100 mol % DPPE. Simulations were performed for 50 ns at 350 K and 1 bar for the liquid-crystalline state of the mixtures. Results show that the average area per headgroup reduces from 0.65 +/- 0.01 nm(2) in pure DPPC to 0.52 +/- 0.01 nm(2) in pure DPPE systems. The lipid tails become more ordered with increasing DPPE concentration, resulting in a slight increase in membrane thickness (3.43 +/- 0.01 nm in pure DPPC to 4.00 +/- 0.01 nm in pure DPPE). The calculated area per headgroup and order parameter for pure DPPE deviates significantly from available experimental measurements, suggesting that the force field employed requires further refinement. In-depth analysis of the hydrogen-bond distribution in DPPE molecules shows that the amine groups strongly interact with the phosphate and carbonyl groups through inter/intramolecular hydrogen bonds. This yields a bilayer structure with DPPE headgroups preferentially located near the lipid phosphate and ester oxygens. It is observed that increasing DPPE concentrations causes competitive hydrogen bonding between the amine groups (hydrogen-donor) and the phosphate/carbonyl groups or water (hydrogen-acceptor). Due to the increasing number of hydrogen-donors from DPPE molecules with increasing concentration, DPPE becomes more hydrated. Trajectory analysis shows that DPPE molecules in the lipid mixtures move laterally and randomly around the membrane surface and the movement becomes more localized with increasing DPPE concentrations. For the conditions and simulation time considered, no aggregation or phase separation was observed between DPPC and DPPE.

Indexed as

1,2-DipalmitoylphosphatidylcholineComputer SimulationHydrogen BondingLipid BilayersModels, ChemicalModels, MolecularOxygenPhosphatidylethanolaminesWater1,2-dipalmitoyl-3-phosphatidylethanolamine1,2-DipalmitoylphosphatidylcholineLipid BilayersOxygenPhosphatidylethanolaminesWater

Identifiers

PMID16533838
PMCPMC1459508

What OpenQuestion holds

Textmetadata
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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.