mRNA-translation的半马尔可夫模型
Semi-Markov models of mRNA-translation
摘要:
翻译是核糖体将信使RNA(mRNA)编码的信息转化为蛋白质的细胞过程。我们考虑到实验确定的,非指数,核糖体的步骤之间的等待时间的排斥过程的翻译模型。从使用现实的参数值的数值模拟,我们确定的分布P(E)的数量的蛋白质E产生的一个mRNA。我们发现,对于小E,这个分布不是几何的。我们提出了一个简化的和解析可解的半马尔可夫模型,涉及P(E)的时间分布,以产生第一个E蛋白。
英文摘要:
Translation is the cellular process in which ribosomes make proteins from information encoded on messenger RNA (mRNA). We model translation with an exclusion process taking into account the experimentally determined, non-exponential, waiting time between steps of a ribosome. From numerical simulations using realistic parameter values, we determine the distribution P(E) of the number of proteins E produced by one mRNA. We find that for small E this distribution is not geometric. We present a simplified and analytically solvable semi-Markov model that relates P(E) to the distributions of the times to produce the first E proteins.
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