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Calculating hydrodynamic interactions for membrane-embedded objects
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DOI：10.1063/1.4896180.png)
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摘要
En 中文
A recently introduced numerical scheme for calculating self-diffusion coefficients of solid objects embedded in lipid bilayer membranes is extended to enable calculation of hydrodynamic interactions between multiple objects. The method is used to validate recent analytical predictions by Oppenheimer and Diamant [Biophys. J. 96, 3041 2009] related to the coupled diffusion of membrane embedded proteins and is shown to converge to known near-field lubrication results as objects closely approach one another; however, the present methodology also applies outside of the limiting regimes where analytical results are available. Multiple different examples involving pairs of disk-like objects with various constraints imposed on their relative motions demonstrate the importance of hydrodynamic interactions in the dynamics of proteins and lipid domains on membrane surfaces. It is demonstrated that the relative change in self-diffusion of a membrane embedded object upon perturbation by a similar proximal solid object displays a maximum for object sizes comparable to the Saffman-Delbruck length of the membrane. (C) 2014 AIP Publishing LLC.
Keyword:
2 SPHERICAL-PARTICLES
TRANSLATIONAL DIFFUSION
BROWNIAN-MOTION
MULTISUBUNIT STRUCTURES
ROTATIONAL DIFFUSION
LATERAL DIFFUSION
LIPID-BILAYERS
PROTEINS
MOBILITY
DYNAMICS
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IF:
3.1
论文数:
7.2W
被引数:
23.2W
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