Navegando por Autor "TROST, Eva"

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Acesso aberto (Open Access)
Complete genome sequence of Corynebacterium pseudotuberculosis I19, a strain isolated from a cow in Israel with bovine mastitis
(American Society for Microbiology, 2011-01) SILVA, Artur Luiz da Costa da; SCHNEIDER, Maria Paula Cruz; CERDEIRA, Louise Teixeira; BARBOSA, Maria Silvanira Ribeiro; RAMOS, Rommel Thiago Juca; CARNEIRO, Adriana Ribeiro; OLIVEIRA, Rodrigo Santos de; LIMA, Margarida Maria Celeira de; CONCEIÇÃO, Marília Lima da; FERREIRA, Vívian D'Afonseca da Silva; ALMEIDA, Sintia Silva de; SANTOS, Anderson Rodrigues dos; SOARES, Siomar de Castro; GOMIDE, Anne Cybelle Pinto; ALI, Amjad; DORELLA, Fernanda Alves; ROCHA, Flávia de Souza; ABREU, Vinicius Augusto Carvalho de; TROST, Eva; TAUCH, Andreas; SHPIGEL, Nahum; MIYOSHI, Anderson; AZEVEDO, Vasco Ariston de Carvalho
This work reports the completion and annotation of the genome sequence of Corynebacterium pseudotuberculosis I19, isolated from an Israeli dairy cow with severe clinical mastitis. To present the whole-genome sequence, a de novo assembly approach using 33 million short (25-bp) mate-paired SOLiD reads only was applied. Furthermore, the automatic, functional, and manual annotations were attained with the use of several algorithms in a multistep process.
Acesso aberto (Open Access)
Evidence for reductive genome evolution and lateral acquisition of virulence functions in two Corynebacterium pseudotuberculosis strains
(Public Library of Science, 2011-04) RUIZ, Jeronimo Conceição; FERREIRA, Vívian D'Afonseca da Silva; SILVA, Artur Luiz da Costa da; ALI, Amjad; GOMIDE, Anne Cybelle Pinto; SANTOS, Anderson Rodrigues dos; ROCHA, Aryane Aparecida Magalhães Cassiano; DORELLA, Fernanda Alves; PACHECO, Luis Gustavo Carvalho; COSTA, Marcilia Pinheiro da; TURK, Meritxell Zurita; SEYFFERT, Núbia; MORAES, Pablo Matias Ribeiro de Oliveira; SOARES, Siomar de Castro; ALMEIDA, Sintia Silva de; CASTRO, Thiago Luiz de Paula; ABREU, Vinicius Augusto Carvalho de; TROST, Eva; BAUMBACH, Jan; TAUCH, Andreas; SCHNEIDER, Maria Paula Cruz; MCCULLOCH, John Anthony; CERDEIRA, Louise Teixeira; RAMOS, Rommel Thiago Juca; ZERLOTINI NETO, Adhemar; DOMINITINI, Anderson Joaquim; RESENDE, Daniela de Melo; COSER, Elisângela Monteiro; OLIVEIRA, Luciana Márcia de; PEDROSA, André Luiz; VIEIRA, Carlos Ueira; GUIMARÃES, Claudia Teixeira; BARTHOLOMEU, Daniela C.; OLIVEIRA, Diana Magalhães de; SANTOS, Fabrício Rodrigues dos; RABELO, Elida Mara Leite; LOBO, Francisco Pereira; FRANCO, Gloria Regina; COSTA, Ana Flávia Dias Vieira da
Corynebacterium pseudotuberculosis, a Gram-positive, facultative intracellular pathogen, is the etiologic agent of the disease known as caseous lymphadenitis (CL). CL mainly affects small ruminants, such as goats and sheep; it also causes infections in humans, though rarely. This species is distributed worldwide, but it has the most serious economic impact in Oceania, Africa and South America. Although C. pseudotuberculosis causes major health and productivity problems for livestock, little is known about the molecular basis of its pathogenicity.
Acesso aberto (Open Access)
PIPS: Pathogenicity Island Prediction Software
(Public Library of Science, 2012-02) SOARES, Siomar de Castro; ABREU, Vinicius Augusto Carvalho de; RAMOS, Rommel Thiago Juca; CERDEIRA, Louise Teixeira; SILVA, Artur Luiz da Costa da; BAUMBACH, Jan; TROST, Eva; TAUCH, Andreas; HIRATA JÚNIOR, Raphael; GUARALDI, Ana Luiza de Mattos; MIYOSHI, Anderson; AZEVEDO, Vasco Ariston de Carvalho
The adaptability of pathogenic bacteria to hosts is influenced by the genomic plasticity of the bacteria, which can be increased by such mechanisms as horizontal gene transfer. Pathogenicity islands play a major role in this type of gene transfer because they are large, horizontally acquired regions that harbor clusters of virulence genes that mediate the adhesion, colonization, invasion, immune system evasion, and toxigenic properties of the acceptor organism. Currently, pathogenicity islands are mainly identified in silico based on various characteristic features: (1) deviations in codon usage, G+C content or dinucleotide frequency and (2) insertion sequences and/or tRNA genetic flanking regions together with transposase coding genes. Several computational techniques for identifying pathogenicity islands exist. However, most of these techniques are only directed at the detection of horizontally transferred genes and/or the absence of certain genomic regions of the pathogenic bacterium in closely related non-pathogenic species. Here, we present a novel software suite designed for the prediction of pathogenicity islands (pathogenicity island prediction software, or PIPS). In contrast to other existing tools, our approach is capable of utilizing multiple features for pathogenicity island detection in an integrative manner. We show that PIPS provides better accuracy than other available software packages. As an example, we used PIPS to study the veterinary pathogen Corynebacterium pseudotuberculosis, in which we identified seven putative pathogenicity islands.
Acesso aberto (Open Access)
Reannotation of the Corynebacterium diphtheriae NCTC13129 genome as a new approach to studying gene targets connected to virulence and pathogenicity in diphtheria
(Dove Medical Press, 2012-02) FERREIRA, Vívian D'Afonseca da Silva; SOARES, Siomar de Castro; ALI, Amjad; SANTOS, Anderson Rodrigues dos; GOMIDE, Anne Cybelle Pinto; ROCHA, Aryane Aparecida Magalhães Cassiano; FARIA, Cássio de Jesus; BARBOSA, Eudes Guilherme Vieira; GUIMARÃES, Luís Carlos; ESLABÃO, Marcus Redü; ALMEIDA, Sintia Silva de; ABREU, Vinicius Augusto Carvalho de; ZERLOTINI NETO, Adhemar; CARNEIRO, Adriana Ribeiro; CERDEIRA, Louise Teixeira; RAMOS, Rommel Thiago Juca; HIRATA JÚNIOR, Raphael; GUARALDI, Ana Luiza de Mattos; TROST, Eva; TAUCH, Andreas; SILVA, Artur Luiz da Costa da; SCHNEIDER, Maria Paula Cruz; MIYOSHI, Anderson; AZEVEDO, Vasco Ariston de Carvalho
Background: The reannotation of genomes already on file is a new approach to discovering new genetic elements and to make the genomes more descriptive and current with relevant features regarding the organism’s lifestyle. Within this approach, the present study aimed to reannotate the genome of the Gram-positive human pathogen Corynebacterium diphtheriae, which causes diphtheria. The deposit of massive amounts of information linked to other spe cies of the genus Corynebacterium has facilitated the updating of the genomic interpretation of this microorganism. Additionally, the emergence of invasive disease by nontoxigenic strains of C. diphtheriae and the reemergence of diphtheria in partially immunized populations have given impetus to new studies in relation to its structural and functional genome. Results: In relation to structural genomics, 23 coding regions (coding sequences) were deleted and 71 new genes were added to the genome annotation. Nevertheless, all the pseudogenes were validated and ten new pseudogenes were created. In relation to functional genomics, about 57% of the genome annotation was updated and became functionally more informative. The product descriptions of 41% (973 proteins) were updated. Among them, 370 that were previously annotated as “hypothetical proteins,” now have more informative descriptions. With the new annotation, the plasticity of the genome became evident, which shows improvements in the annotation of 13 pathogenicity islands already described in the literature. In addition, the large number of transposases and the presence of structural genes of bacteriophages make their genomic versatility evident. Contrasting with this reality, it also allowed the clarification of some aspects concerned with mechanisms used by C. diphtheriae to stop the invasion of the genome by bacteriophages, mediated by the clustered regularly interspaced short palindromic repeats region. Conclusion: The reannotation of the C. diphtheriae genome provided an improvement in annotation of the C. diphtheriae genome in several aspects, such as virulence characteristics and plasticity events. Moreover, the protocol used here can be extended to various other pathogens in order to improve the genomic information already on file in public databases and to minimize propagating errors. The reannotated archive and updated archive are available at: http://lgcm. icb.ufmg.br/pub/C_diphtheriae_reannotation.embl.
Acesso aberto (Open Access)
The Pan-Genome of the Animal Pathogen Corynebacterium pseudotuberculosis Reveals Differences in Genome Plasticity between the Biovar ovis and equi Strains
(Public Library of Science, 2013-01) SOARES, Siomar de Castro; SILVA, Artur Luiz da Costa da; TROST, Eva; BLOM, Jochen; RAMOS, Rommel Thiago Juca; CARNEIRO, Adriana Ribeiro; ALI, Amjad; SANTOS, Anderson Rodrigues dos; GOMIDE, Anne Cybelle Pinto; DINIZ, Carlos Augusto Almeida; BARBOSA, Eudes Guilherme Vieira; DORELLA, Fernanda Alves; ABURJAILE, Flavia Figueira; ROCHA, Flávia de Souza; NASCIMENTO, Karina Kelly Fiaux do; GUIMARÃES, Luís Carlos; ALMEIDA, Sintia Silva de; HASSAN, Syed Shah; BAKHTIAR, Syeda Marriam; PEREIRA, Ulisses de Pádua; ABREU, Vinicius Augusto Carvalho de; SCHNEIDER, Maria Paula Cruz; MIYOSHI, Anderson; TAUCH, Andreas; AZEVEDO, Vasco Ariston de Carvalho
Corynebacterium pseudotuberculosis is a facultative intracellular pathogen and the causative agent of several infectious and contagious chronic diseases, including caseous lymphadenitis, ulcerative lymphangitis, mastitis, and edematous skin disease, in a broad spectrum of hosts. In addition, Corynebacterium pseudotuberculosis infections pose a rising worldwide economic problem in ruminants. The complete genome sequences of 15 C. pseudotuberculosis strains isolated from different hosts and countries were comparatively analyzed using a pan-genomic strategy. Phylogenomic, pan-genomic, core genomic, and singleton analyses revealed close relationships among pathogenic corynebacteria, the clonal-like behavior of C. pseudotuberculosis and slow increases in the sizes of pan-genomes. According to extrapolations based on the pan-genomes, core genomes and singletons, the C. pseudotuberculosis biovar ovis shows a more clonal-like behavior than the C. pseudotuberculosis biovar equi. Most of the variable genes of the biovar ovis strains were acquired in a block through horizontal gene transfer and are highly conserved, whereas the biovar equi strains contain great variability, both intra- and inter-biovar, in the 16 detected pathogenicity islands (PAIs). With respect to the gene content of the PAIs, the most interesting finding is the high similarity of the pilus genes in the biovar ovis strains compared with the great variability of these genes in the biovar equi strains. Concluding, the polymerization of complete pilus structures in biovar ovis could be responsible for a remarkable ability of these strains to spread throughout host tissues and penetrate cells to live intracellularly, in contrast with the biovar equi, which rarely attacks visceral organs. Intracellularly, the biovar ovis strains are expected to have less contact with other organisms than the biovar equi strains, thereby explaining the significant clonal-like behavior of the biovar ovis strains.
Acesso aberto (Open Access)
Whole-Genome Sequence of Corynebacterium pseudotuberculosis PAT10 Strain Isolated from Sheep in Patagonia, Argentina
(American Society for Microbiology, 2011-11) CERDEIRA, Louise Teixeira; GOMIDE, Anne Cybelle Pinto; SCHNEIDER, Maria Paula Cruz; ALMEIDA, Sintia Silva de; SANTOS, Anderson Rodrigues dos; BARBOSA, Eudes Guilherme Vieira; ALI, Amjad; BARBOSA, Maria Silvanira Ribeiro; CARNEIRO, Adriana Ribeiro; RAMOS, Rommel Thiago Juca; OLIVEIRA, Rodrigo Santos de; BARH, Debmalya; SHARMA, Neha Barve; ZAMBARE, Vasudeo; BELCHIOR, Silvia Estevão; GUIMARÃES, Luís Carlos; SOARES, Siomar de Castro; DORELLA, Fernanda Alves; ROCHA, Flávia de Souza; ABREU, Vinicius Augusto Carvalho de; TAUCH, Andreas; TROST, Eva; MIYOSHI, Anderson; AZEVEDO, Vasco Ariston de Carvalho; SILVA, Artur Luiz da Costa da
In this work, we report the complete genome sequence of a Corynebacterium pseudotuberculosis PAT10 isolate, collected from a lung abscess in an Argentine sheep in Patagonia, whose pathogen also required an investigation of its pathogenesis. Thus, the analysis of the genome sequence offers a means to better understanding of the molecular and genetic basis of virulence of this bacterium.