Membrane budding and encapsulation induced by semi-flexible polymers

Details Membrane budding and encapsulation induced by semi-flexible polymers Membrane budding and encapsulation induced by semi-flexible polymers

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..519..507k&link_type=abstract

STATISTICAL PHYSICS: Third Tohwa University International Conference. AIP Conference Proceedings, Volume 519, pp. 507-509 (2000

Physics

1

Proteins, Membranes, Bilayers, And Vesicles, Thermodynamics Of Solutions

Scientific paper

The interaction between semiflexible polymers and membranes poses an important problem for biological applications. We investigate the curvature of a membrane induced by a long, semiflexible chain using a scaling theory. It is found that the interaction strength coupled with the chain stiffness competes with thermal fluctuation to determine the membrane bending. Either in isotropic/adsorbed phase or oriented/weakly-adsorbed phase, the polymer forms loops, which drive entropically the membrane to have positive curvature, leading to budding. On the other hand, in oriented/strongly-adsorbed phase, the interaction dominates the entropy, leading to negative curvature and eventually encapsulation of the polymer by the membrane. .

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