Molecular dynamics simulation of a lipid diamond cubic phase

  • Marrink S
  • Tieleman D
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This paper presents the first atomistic simulation of a cubic membrane phase. Using the molecular dynamics simulation technique both the global and the local organization of glycerolmonoolein molecules inside the diamond cubic phase are studied. Multinanosecond simulations reveal that the center of the cubic bilayer remains close to the infinite periodic minimal surface that describes the diamond geometry. We further show that the equilibrium structure of the surfactant molecules inside the cubic phase is very similar to their structure inside a simulated lamellar bilayer. The small differences arise from the packing constraints of the surfactants within the cubic phase which has an area per surfactant that increases toward the bilayer center.

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  • S. J. Marrink

  • D. P. Tieleman

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