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Statistical Properties of the Dichotomous Noise Generated in Biochemical Processes

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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.

References
1.
Kojima H, Kikumoto M, Sakakibara H, Oiwa K . Mechanical Properties of a Single-Headed Processive Motor, Inner-Arm Dynein Subspecies-c of ChlamydomonasStudied at the Single Molecule Level. J Biol Phys. 2013; 28(3):335-45. PMC: 3456751. DOI: 10.1023/A:1020300319224. View

2.
Shao Q, Gao Y . On the hand-over-hand mechanism of kinesin. Proc Natl Acad Sci U S A. 2006; 103(21):8072-7. PMC: 1472431. DOI: 10.1073/pnas.0602828103. View

3.
Lu H, Xun L, Xie X . Single-molecule enzymatic dynamics. Science. 1998; 282(5395):1877-82. DOI: 10.1126/science.282.5395.1877. View

4.
Bruno W, Yang J, Pearson J . Using independent open-to-closed transitions to simplify aggregated Markov models of ion channel gating kinetics. Proc Natl Acad Sci U S A. 2005; 102(18):6326-31. PMC: 1088360. DOI: 10.1073/pnas.0409110102. View

5.
Liu X, Pollack G . Stepwise sliding of single actin and Myosin filaments. Biophys J. 2003; 86(1 Pt 1):353-8. PMC: 1303800. DOI: 10.1016/S0006-3495(04)74111-9. View