Title : Bayesian estimation of the internal structure of proteins from single-molecule measurements

Language: English
Type: Article
Authors: Makito Miyazaki and Takahiro Harada
Journal: Journal of Chemical Physics
ISSN: 0021-9606
Volume: 134
Number: 8
Month: 3
Year: 2011
Actual year: 2010
Pages: 32767-10
doi:   10.1063/1.3516587
Abstract: In single-molecule protein experiments, the observable variables are restricted within a small fraction of the entire degrees of freedom. Therefore, to investigate the physical nature of proteins in detail, we always need to estimate the hidden internal structure referring only to the accessible degrees of freedom. We formulate this problem on the basis of Bayesian inference, which can be applied to various complex systems. In the ideal case, we find that in general the framework actually works. Although careful numerical studies confirm that our method outperforms the conventional method by up to two orders of magnitude, we find a striking phenomenon: a loss-of-precision transition occurs abruptly when the design of the observation system is inappropriate. The basic features of the proposed method are illustrated using a simple but nontrivial model.

"Bayesian estimation of the internal structure of proteins from single-molecule measurements"

Makito Miyazaki and Takahiro Harada, Journal of Chemical Physics, 134, 32767-10 (2011)