Genomic assemblies of newly sequenced Trypanosoma cruzi strains reveal new genomic expansion and greater complexity
Entity
UAM. Departamento de Biología Molecular; Centro de Biología Molecular Severo Ochoa (CBM); Instituto de Investigación del Hospital de La Princesa (IP)Publisher
Nature Research (part of Springer Nature)Date
2018-10-02Citation
10.1038/s41598-018-32877-2
Scientific Reports 8.1 (2018) 14631
ISSN
2045-2322DOI
10.1038/s41598-018-32877-2Funded by
This work was supported by the “Consejo Nacional de Ciencia y Tecnología” (CONACYT, México) through the FC-H Ph.D. studentship number 411595 and the “Consejo de Ciencia, Tecnología e Innovación de Hidalgo (CITNOVA, México);; “Ministerio de Economía y competitividad” (SAF2015-63868-R (MINECO/FEDER) to N.G., SAF2016-75988-R (MINECO/FEDER) to M.F.); “Red de Investigación de Centros de Enfermedades Tropicales” (RICET RD12/0018/0004 to M.F.); European Union (HEALTH-FE-2008-22303, ChagasEpiNet to M.F.); Comunidad de Madrid (S-2010/BMD-2332 to M.F.); and Institutional grants from “Fundación Ramón Areces” and “Banco de Santander”Project
Gobierno de España. SAF2015-63868-R; Gobierno de España. SAF2016-75988-R; info:eu-repo/grantAgreement/EC/FP7/22303; Comunidad de Madrid. S-2010/BMD-2332/INDISNETEditor's Version
https://doi.org/10.1038/s41598-018-32877-2Subjects
Trypanosoma cruzi; New genomic; Expansion and greater complexity; Strains; Biología y Biomedicina / BiologíaRights
© The Author(s) 2018Abstract
Chagas disease is a complex illness caused by the protozoan Trypanosoma cruzi displaying highly diverse clinical outcomes. In this sense, the genome sequence elucidation and comparison between strains may lead to disease understanding. Here, two new T. cruzi strains, have been sequenced, Y using Illumina and Bug2148 using PacBio, assembled, analyzed and compared with the T. cruzi annotated genomes available to date. The assembly stats from the new sequences show effective improvement of T. cruzi genome over the actual ones. Such as, the largest contig assembled (1.3 Mb in Bug2148) in de novo attempts and the highest mean assembly coverage (71X for Y). Our analysis reveals a new genomic expansion and greater complexity for those multi-copy gene families related to infection process and disease development, such as Trans-sialidases, Mucins and Mucin Associated Surface Proteins, among others. On one side, we demonstrate that multi-copy gene families are located near telomeric regions of the “chromosome-like” 1.3 Mb contig assembled of Bug2148, where they likely suffer high evolutive pressure. On the other hand, we identified several strain-specific single copy genes that might help to understand the differences in infectivity and physiology among strains. In summary, our results indicate that T. cruzi has a complex genomic architecture that may have promoted its evolution.
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Google Scholar:Callejas Hernández, Francisco
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Rastrojo, Alberto
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Poveda, Cristina
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Gironés Pujol, Nuria
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Fresno Escudero, Manuel
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