Stabilization of pores in lipid bilayers by anisotropic inclusions

Article Abstract:

A theoretical model that predicts the existence of stable pores in a lipid membrane, induced by the presence of anisotropic inclusions is presented. It is observed that the optimal pore size is governed by the shape of the anisotropic inclusions, saddle-like inclusions favor small pores, whereas more wedgelike inclusions give rise to larger pore sizes. Results indicate that the model is simple and approximate, but provides a lucid and reproducible framework to investigate pore formation in lipid membranes.

Anisotropy

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Molecular dynamics study on the effects of chain branching on the physical properties of lipid bilayers: 2. Permeability

Article Abstract:

The effects of chain branching on the water and nonionic (neutral) solute permeability of lipid bilayers in a molecular dynamics simulation comparing two bilayers: dipalmitoylphosphatidylcholine (DPPC) and diphytanoylphosphatidylcholine (DPhPC). The effects of chain branching on proton permeability were also discussed in the context of the proton-wire hypothesis.

Molecular dynamics, Chemistry, Physical and theoretical, Physical chemistry

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Bridging like-charged macroions through long divalent rodlike ions

Article Abstract:

A density functional theory is developed for rodlike ions sandwiched between two like-charged planar surfaces. The results have highlighted the importance of the rodlike internal structure that condensing agents like polyamines, peptides or polymer segments have displayed.

Density functionals, Density functional theory, Mechanical properties, Polyamines, Metal ions, Electrostatic interactions, Structure

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