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arXiv 0810.2232cond-mat.stat-mech
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蛋白质动力学马尔可夫模型中的非马尔可夫涨落

Non-Markovian fluctuations in Markovian models of protein dynamics

Arti Dua, R. Adhikari

摘要:

最近使用荧光光谱的实验已经能够探测蛋白质中构象波动的动力学。波动是高斯的,但不按指数衰减,因此是非马尔可夫的。我们提出了一个理论,其中非马尔可夫波动动力学自然出现的马尔可夫波动的正常模式的蛋白质的叠加。正常模式的类Rouse动力学与实验测量的关联函数非常一致。我们提供了简单的缩放参数合理化我们的结果。

英文摘要:

Recent experiments using fluorescence spectroscopy have been able to probe the dynamics of conformational fluctuations in proteins. The fluctuations are Gaussian but do not decay exponentially, and are therefore, non-Markovian. We present a theory where non-Markovian fluctuation dynamics emerges naturally from the superposition of the Markovian fluctuations of the normal modes of the protein. A Rouse-like dynamics of the normal modes provides very good agreement to the experimentally measured correlation functions. We provide simple scaling arguments rationalising our results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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