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Caveolae are invagination structures in plasma membrane, size of about 100 nm. The main function of caveolae is still under debate. Recently it is proposed that the caveolae become flattened as buffers of plasma membrane at hypo-osmotic shock. We performed theoretical analysis and computer simulation to test this hypothesis. In the theoretical analysis, we calculated force acted on the caveolae and found that, the direction of force depends on the shape of caveolae: the expanding force and constriction force are both expected. The constriction force may give the opposite result; constricted caveolae. Then we performed coarse-grained membrane (polygon membrane) simulation and confirmed the existence of constricted caveolae, which is a novel membrane structures.

seibutsu butsuri/seibutsu butsuri

2P193 Theoretical and simulation study for deformation of caveolae under hypo-osmotic condition(12. Cell biology,Poster,The 52nd Annual Meeting of the Biophysical Society of Japan(BSJ2014))