abstract bibtex

How do lipid molecules in membranes perform a flip-flop? The flip-flops of lipid molecules play a crucial role in the formation and flexibility of membranes. However, little has been determined about the behavior of flip-flops, either experimentally, or in molecular dynamics simulations. Here, we provide numerical results of the flip-flops of model lipid molecules in a model membrane and investigate the statistical properties, using millisecond-order coarse-grained molecular simulations (dissipative particle dynamics). We find that there are three different ways of flip-flops, which can be clearly characterized by their paths on the free energy surface. Furthermore, we found that the probability of the number of the flip-flops is well fitted by the Poisson distribution, and the probability density function for the inter-occurrence times of flip-flops coincides with that of the forward recurrence times. These results indicate that the occurrence of flip-flops is a Poisson process, which will play an important role in the flexibilities of membranes.

@article{ id = {1ff0ca1b-fae8-3521-be70-2a9ff4697e3d}, title = {Poisson property of the occurrence of flip-flops in a model membrane.}, type = {article}, year = {2014}, identifiers = {[object Object]}, created = {2014-12-10T04:09:01.000Z}, pages = {064901}, volume = {140}, websites = {http://scitation.aip.org/content/aip/journal/jcp/140/6/10.1063/1.4863330}, month = {2}, publisher = {AIP Publishing}, day = {14}, accessed = {2014-06-03}, file_attached = {false}, profile_id = {6708b05a-e661-38c6-9bb8-cf4f304b6385}, group_id = {424eb3e1-9b50-35ed-91d3-65c78c3164d7}, last_modified = {2014-12-10T09:11:31.000Z}, read = {false}, starred = {false}, authored = {false}, confirmed = {true}, hidden = {false}, citation_key = {Arai2014a}, abstract = {How do lipid molecules in membranes perform a flip-flop? The flip-flops of lipid molecules play a crucial role in the formation and flexibility of membranes. However, little has been determined about the behavior of flip-flops, either experimentally, or in molecular dynamics simulations. Here, we provide numerical results of the flip-flops of model lipid molecules in a model membrane and investigate the statistical properties, using millisecond-order coarse-grained molecular simulations (dissipative particle dynamics). We find that there are three different ways of flip-flops, which can be clearly characterized by their paths on the free energy surface. Furthermore, we found that the probability of the number of the flip-flops is well fitted by the Poisson distribution, and the probability density function for the inter-occurrence times of flip-flops coincides with that of the forward recurrence times. These results indicate that the occurrence of flip-flops is a Poisson process, which will play an important role in the flexibilities of membranes.}, bibtype = {article}, author = {Arai, Noriyoshi and Akimoto, Takuma and Yamamoto, Eiji and Yasui, Masato and Yasuoka, Kenji}, journal = {J. Chem. Phys.}, number = {6} }

Downloads: 0