Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/327986
Type: Artigo
Title: The Diversity And Expansion Of The Trans-sialidase Gene Family Is A Common Feature In Trypanosoma Cruzi Clade Members
Author: Angel Chiurillo
Miguel; Cortez
Danielle R.; Lima
Fabio M.; Cortez
Caroline; Luis Ramirez
Jose; Martins
Andre G.; Serrano
Myrna G.; Teixeira
Marta M. G.; da Silveira
Jose Franco
Abstract: Trans-sialidase (TS) is a polymorphic protein superfamily described in members of the protozoan genus Trypanosoma. Of the eight TS groups recently described, TS group I proteins (some of which have catalytic activity) are present in the distantly related Trypanosoma brucei and Trypanosoma cruzi phylogenetic clades, whereas other TS groups have only been described in some species belonging to the T. cruzi clade. In the present study we analyzed the repertoire, distribution and phylogenetic relationships of TS genes among species of the T. cruzi clade based on sequence similarity, multiple sequence alignment and tree-reconstruction approaches using TS sequences obtained with the aid of PCR-based strategies or retrieved from genome databases. We included the following representative isolates of the T. cruzi clade from South America: T. cruzi, T. cruzi Tcbat, Trypanosoma cruzi marinkellei, Trypanosoma dionisii, Trypanosoma rangeli and Trypanosoma conorhini. The cloned sequences encoded conserved TS protein motifs Asp-box and VTVxNVxLYNR but lacked the FRIP motif (conserved in TS group I). The T. conorhini sequences were the most divergent The hybridization patterns of IS probes with chromosomal bands confirmed the abundance of these sequences in species in the T. cruzi clade. Divergence and relationship analysis placed most of the TS sequences in the groups defined in T. cruzi. Further examination of members of TS group II, which includes T. cruzi surface glycoproteins implicated in host cell attachment and invasion, showed that sequences of T. cruzi Tcbat grouped with those of T. cruzi genotype TcI. Our analysis indicates that different members of the T. cruzi clade, with different vertebrate hosts, vectors and pathogenicity, share the extensive expansion and sequence diversification of the TS gene family. Altogether, our results are congruent with the evolutionary history of the T. cruzi clade and represent a contribution to the understanding of the molecular evolution and role of TS proteins in trypanosomes. (C) 2015 Elsevier B.V. All rights reserved.
Subject: Trypanosoma Cruzi Clade
Trans-sialidase
Gene Superfamily
Conserved Motif
Phylogeny
Dtus
Editor: Elsevier Science BV
Amsterdam
Rights: fechado
Identifier DOI: 10.1016/j.meegid.2015.11.024
Address: http://www.sciencedirect.com/science/article/pii/S156713481530054X
Date Issue: 2016
Appears in Collections:Unicamp - Artigos e Outros Documentos

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