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Computational reconstruction of mitochondria-encoded mammal ancestral proteins (1504.03845v1)

Published 15 Apr 2015 in q-bio.GN

Abstract: A method based on mapping a symbolic sequence into a set of patterns (strings resulting from the sequence parsing) is proposed as a tool for the reconstruction of ancestral sequences. The set union of patterns comprises all the patterns present in the family of related proteins sequences of an extant species. The set of most frequent patterns among protein sequences is selected and concatenated. The resulting sequence of amino acids is supposed to be the ancestral protein of the family. No sequences alignment and phylogenetic tree of the species family are necessary. The method is used for inferring the ancestral amino acid sequences of thirteen mitochondria-encoded protein families of mammal species. Statistical distribution of the similarity between extant and ancestral sequences exhibits some structures related to environmental changes in the past.

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