title: Statistical properties of the dichotomous noise generated in biochemical processes.
abstract: Dichotomous noise detected with the help of various single-molecule techniques convincingly reveals the actual occurrence of a multitude of conformational substates composing the native state of proteins. The nature of the stochastic dynamics of transitions between these substates is determined by the particular statistical properties of the noise observed. These involve nonexponential and possibly oscillatory time decay of the second order autocorrelation function, its relation to the third order autocorrelation function, and a relationship to dwell-time distribution densities and their correlations. Processes gated by specific conformational substates are distinguished from those with fluctuating barriers. This study throws light on the intriguing matter of the possibility of multiple stepping of the myosin motor along the actin filament per ATP molecule hydrolyzed.
authors.affiliation: Faculty of Physics, Adam Mickiewicz University, Umultowska 85, 61-614, Poznań, Poland. kurzphys@amu.edu.pl
authors.forename: Michał
authors.initials: M
authors.lastname: Kurzyński
mesh_terms: D008841:Actin Cytoskeleton / Q000737:chemistry / Q000378:metabolism; D000255:Adenosine Triphosphate / Q000378:metabolism; D008853:Microscopy / Q000379:methods; D008954:Models, Biological; D015233:Models, Statistical; D009218:Myosins / Q000737:chemistry / Q000378:metabolism; D052898:Optical Tweezers; D018408:Patch-Clamp Techniques; D011487:Protein Conformation; D013269:Stochastic Processes; D013995:Time
chemical_list: D000255:Adenosine Triphosphate; D009218:Myosins