Indirect interactions of membrane-adsorbed cylinders.
Biological and biomimetic membranes often contain aggregates of embedded or adsorbed macromolecules. In this paper, the indirect interactions of cylindrical objects adhering to a planar membrane are considered theoretically. The adhesion of the cylinders causes a local perturbation of the equilibrium membrane shape, which leads to membrane-mediated interactions. For a planar membrane under lateral tension, the interaction is repulsive for a pair of cylinders adhering to the same side of the membrane, and attractive for cylinders adhering at opposite membrane sides. For a membrane in an external harmonic potential, the interaction of adsorbed cylinders is always attractive and increases if forces perpendicular to the membrane act on the cylinders.
Max-Planck-Institut für Kolloid- und Grenzflächenforschung, 14424 , Potsdam, Germany. thomas.weikl@mpikg-golm.mpg.de.
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D000327:Adsorption; D001665:Binding Sites; D002448:Cell Adhesion / Q000502:physiology*; D002462:Cell Membrane / Q000502:physiology*; D003198:Computer Simulation; D004548:Elasticity; D008051:Lipid Bilayers / Q000737:chemistry* / Q000378:metabolism*; D008560:Membrane Fluidity; D008567:Membranes, Artificial; D008954:Models, Biological; D008956:Models, Chemical; D055672:Static Electricity; D013314:Stress, Mechanical; D013499:Surface Properties
D008051:Lipid Bilayers; D008567:Membranes, Artificial