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马达蛋白定向运动及能量转换效率的研究
引用本文:王志坚,郭维生,彭艳辉,吉图.马达蛋白定向运动及能量转换效率的研究[J].现代生物医学进展,2007,7(10):1458-1460.
作者姓名:王志坚  郭维生  彭艳辉  吉图
作者单位:1. 内蒙古大学理工学院物理系,呼和浩特,010021;天水师范学院数理与信息科学学院物理系,甘肃,天水,741001
2. 内蒙古大学理工学院物理系,呼和浩特,010021
3. 东北农业大学生物物理系,哈尔滨,150030
基金项目:国家自然科学基金;内蒙古自治区教育厅高等学校科学研究项目;内蒙古人才工程项目;内蒙古大学校科研和教改项目
摘    要:通过建立非平衡涨落下的随机跃迁的两态模型,并利用非对称的周期势和Fokker-Planck方程及其本征值法计算两态模型的几率流和稳态几率流密。结果表明马达蛋白的定向运动与有效势的整体倾斜斜率有关,定性讨论了系统能量转换效率与负载有关。

关 键 词:分子马达  定向运动  有效势  Fokkcr-Planck方程  效率
文章编号:1673-6273(2007)10-1458-03
修稿时间:2007-06-06

Research on Directed Motion and Energy Conversion Efficiency of Motor Proteins
WANG Zhi-jian,GUO Wei-sheng,PENG Yan-hui,JI Tu.Research on Directed Motion and Energy Conversion Efficiency of Motor Proteins[J].Progress in Modern Biomedicine,2007,7(10):1458-1460.
Authors:WANG Zhi-jian  GUO Wei-sheng  PENG Yan-hui  JI Tu
Abstract:Stochastically two-state hopping model in the non-equilibrium fluctuation was established.The current and effective potential in the two-state model were calculated by equation of Fokker-Planck and asymmetric periodic potential.It was shown that the directed motion of motor proteins was relevant to the slope of the effective potential.The method of eigenvalue in Fokker-Planck's equa- tion was used to calculate the probability density in stable state.The energy conversion efficiency in the system was discussed qualitatively, and the results showed that the efficiency correlates with the external load.
Keywords:Molecular motors  Directed motion  Effective potential  Fokker-Planck equation  Efficiency
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