Diffusion Process of Myosin and Utilization of ATP Energy in F-Actin Solution
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概要
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Theoretical calculation has been made on the problem of random flights of myosin particle, where it is assumed that individual myosin particle can on F-actin-activated ATP hydrolysis and then diffuse freely in the aqueous solution. The apparent diffusion coefficient of such myosin particles is formulated as D=D_0(1-f)+(1/9)L_0Vf, where D_0 is the diffusion coefficient of the free particles in the absence of ATP and F-actin, f is the fraction of the particles bound on F-actin filaments, L_0 is the average length of F-actin, and V is the sliding velocity of the particles on F-actin filements. It is suggested that the sliding velocity V can be estimated experimentally on the basis of the above equation. An equivalent but more generally applicable equation than the above equation has also been derived by solving the Brownian motion of myosin particle describad by the Langevin's equation. The factors which influence on efficiency of the energy transformation from chemical to mechanical are discussed.
- 社団法人日本物理学会の論文
- 1974-04-15
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