Membrane buckling induced by curved filaments

Details Membrane buckling induced by curved filaments Membrane buckling induced by curved filaments

2009-03-19

arxiv.org/abs/0903.3363v2

Phys. Rev. Lett. 103, 038101 (2009)

Physics

Biological Physics

4 pages, 3 figures; title and abstract modified, typos corrected, references added

Scientific paper

10.1103/PhysRevLett.103.038101

We present a novel buckling instability relevant to membrane budding in eukaryotic cells. In this mechanism, curved filaments bind to a lipid bilayer without changing its intrinsic curvature. As more and more filaments adsorb, newly added ones are more and more strained, which destabilizes the flat membrane. We perform a linear stability analysis of filament-dressed membranes and find that the buckling threshold is within reasonable in vivo parameter values. We account for the formation of long tubes previously observed in cells and in purified systems. We study strongly deformed dressed membranes and their bifurcation diagram numerically. Our mechanism could be validated by a simple experiment.

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