Properties of soliton-transported bio-energy in alpha-helix protein molecules with three channels

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	Properties of soliton-transported bio-energy in alpha-helix protein molecules with three channels
	X. F. Pang ; M. J. Liu
刊名	Communications in Theoretical Physics
	2007
卷号	48 期号:2 页码:369-376
关键词	bio-energy transport soliton protein molecule Runge-Kutta method thermal stabilization davydov soliton finite-temperature improved model characteristic parameters thermodynamic properties biological temperature living systems polaron band heat bath quantum
ISSN号	0253-6102
中文摘要	We study numerically the propagating properties of soliton-transported bio-energy excited in the alpha-helix protein molecules with three channels in the cases of the short-time and long-time motions and its features of collision at temperature T = 0 and biological temperature T = 300 K by the dynamic equations in the improved Davydov theory and fourth-order Runge-Kutta method, respectively. From these simulation experiments we see that the new solitons in the improved model can move without dispersion at a constant speed retaining its shape and energy in the cases of motion of both short-time or T = 0 and long time or T = 300 K and can go through each other without scattering in their collisions. In these cases its lifetime is, at least, 120 ps at 300 K, in which the soliton can travel over about 700 amino acid residues. This result is consistent with analytic result obtained by quantum perturbed theory in this model. In the meanwhile, the influences of structure disorder of a-helix protein molecules, including the inhomogeneous distribution of amino acids with different masses and fluctuations of spring constant, dipole-dipole interaction, exciton-phonon coupling constant and diagonal disorder, on the solitons are also studied by the fourth-order Runge-Kutta method. The results show that the soliton still is very robust against the structure disorders and thermal perturbation of proteins at biological temperature 300 K. Therefore we can conclude that the new soliton in the a-helix protein molecules with three channels is a possible carrier of bio-energy transport and the improved model is possibly a candidate for the mechanism of this transport.
原文出处	://WOS:000249140700034
公开日期	2012-04-13
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/33776]
专题	金属研究所_中国科学院金属研究所
推荐引用方式 GB/T 7714	X. F. Pang,M. J. Liu. Properties of soliton-transported bio-energy in alpha-helix protein molecules with three channels[J]. Communications in Theoretical Physics,2007,48(2):369-376.
APA	X. F. Pang,&M. J. Liu.(2007).Properties of soliton-transported bio-energy in alpha-helix protein molecules with three channels.Communications in Theoretical Physics,48(2),369-376.
MLA	X. F. Pang,et al."Properties of soliton-transported bio-energy in alpha-helix protein molecules with three channels".Communications in Theoretical Physics 48.2(2007):369-376.