Stochastic analysis of amino acid substitution in protein synthesis

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Abstract

We present a formal analysis of amino acid replacement during mRNA translation. Building on an abstract stochastic model of arrival of tRNAs and their processing at the ribosome, we compute probabilities of the insertion of amino acids into the nascent polypeptide chain. To this end, we integrate the probabilistic model checker Prism in the Matlab environment. We construct the substitution matrix containing the probabilities of an amino acid replacing another. The resulting matrix depends on various parameters, including availability and concentration of tRNA species, as well as their assignment to individual codons. We draw a parallel with the standard mutation matrices like Dayhoff and PET91, and analyze the mutual replacement of biologically similar amino acids. Partially supported by EU FP6-project ESIGNET.
Original languageEnglish
Title of host publicationComputational Methods in Systems Biology (6th International Conference, CMSB 2008, Rostock, Germany, October 12-15, 2008, Proceedings)
EditorsM. Heimer, A.M. Uhrmacher
Place of PublicationBerlin
PublisherSpringer
Pages367-386
ISBN (Print)978-3-540-88561-0
DOIs
Publication statusPublished - 2008

Publication series

NameLecture Notes in Computer Science
Volume5307
ISSN (Print)0302-9743

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