Сибирский федеральный университет

Тип публикации: статья из журнала

Год издания: 2017

Идентификатор DOI: 10.1134/S0006350917030253

Ключевые слова: biological membrane, lipid density gradient, soliton, viscoelasticity

Аннотация: Physical mechanisms for the modulation of lipid nanodomain dynamics and transport of small molecules across the lipid bilayer of biological membranes can have considerable functional significance. The longitudinal propagating compression–expansion mode in a single-component lipid bilayer is considered on a spatial scale comparable to the bilayer thickness. The expression used for free energy per lipid molecule includes a term with the gradient of the area per lipid molecule. The finite character of the stress relaxation time in the lipid bilayer, which causes significant attenuation of viscous damping at sufficiently high frequencies, is taken into account. A hydrodynamic ad hoc model that describes soliton-like excitations in the bilayer is proposed. The possibility of formation and propagation of nanoscale pulses of lipid density with velocities determined by surface compressibility of the bilayer (similarly to the propagation of sound) is demonstrated for the picosecond time scale.

Журнал: Biophysics

Выпуск журнала: Т. 62, № 3

Номера страниц: 396-406

ISSN журнала: 00063509

Место издания: Москва

Издатель: Pleiades Publishing, Ltd. (Плеадес Паблишинг, Лтд)

• Zakhvataev V.E. (Siberian Federal University)

• РИНЦ (eLIBRARY.RU)
• Scopus