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Ribosome Dwell Times and the Protein Copy Number Distribution
Authors:Mieke Gorissen  Carlo Vanderzande
Institution:1.Faculty of Sciences,Hasselt University,Diepenbeek,Belgium;2.Instituut Theoretische Fysica,Katholieke Universiteit Leuven,Heverlee,Belgium
Abstract: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 model that relates P(E) to the distributions of the times to produce the first E proteins.
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