Y. Imafuku et al., MONTE-CARLO STUDY FOR FLUCTUATION ANALYSIS OF THE IN-VITRO MOTILITY DRIVEN BY PROTEIN MOTORS, Biophysical chemistry, 59(1-2), 1996, pp. 139-153
The fluctuation properties of the sliding movement of an individual cy
toskeletal filament driven by protein motors in vitro can be analyzed
by calculating the mean-square deviation of the displacement from the
average within its single trajectory. For this purpose, a Monte Carlo
simulation was used to define the conditions and limitations of a meth
od for smoothing (curved) noisy trajectories without affecting either
the steady or fluctuation characteristics inherent to the individual f
ilament sliding movement. By applying the method to real experimental
trajectory data, we show that an effective diffusion coefficient from
displacement fluctuations of a sliding filament can be obtained from i
ts single noisy trajectory even when it is curved.