Go-and-Back method: Effective estimation of the hidden motion of proteins from single-molecule time series

Details Go-and-Back method: Effective estimation of the hidden motion of proteins from single-molecule time series Go-and-Back method: Effective estimation of the hidden motion of proteins from single-molecule time series

2010-11-17

arxiv.org/abs/1011.4222v2

Physics

Chemical Physics

10 pages, 7 figures

Scientific paper

We present an effective method for estimating the motion of proteins from the motion of attached probe particles in single-molecule experiments. The framework naturally incorporates Langevin dynamics to compute the most probable trajectory of the protein. By using a perturbation expansion technique, we achieve computational costs more than four orders of magnitude smaller than the conventional gradient descent method without loss of simplicity in the computation algorithm. We present illustrative applications of the method using simple models of single-molecule experiments and confirm that the proposed method yields reasonable and stable estimates of the hidden motion in a highly efficient manner.

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