Evidence for Reductive Genome Evolution and Lateral Acquisition of Virulence Functions in Two Corynebacterium pseudotuberculosis Strains

Ruiz JC, D'Afonseca V, Silva A, Ali A, Pinto AC, Santos AR, Rocha AAMC, Lopes DO, Dorella FA, Pacheco LGC, Costa MP, et al. (2011)
PLoS ONE 6(4): e18551.

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Background: 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. Methodology and Findings: We characterized two C. pseudotuberculosis genomes (Cp1002, isolated from goats; and CpC231, isolated from sheep). Analysis of the predicted genomes showed high similarity in genomic architecture, gene content and genetic order. When C. pseudotuberculosis was compared with other Corynebacterium species, it became evident that this pathogenic species has lost numerous genes, resulting in one of the smallest genomes in the genus. Other differences that could be part of the adaptation to pathogenicity include a lower GC content, of about 52%, and a reduced gene repertoire. The C. pseudotuberculosis genome also includes seven putative pathogenicity islands, which contain several classical virulence factors, including genes for fimbrial subunits, adhesion factors, iron uptake and secreted toxins. Additionally, all of the virulence factors in the islands have characteristics that indicate horizontal transfer. Conclusions: These particular genome characteristics of C. pseudotuberculosis, as well as its acquired virulence factors in pathogenicity islands, provide evidence of its lifestyle and of the pathogenicity pathways used by this pathogen in the infection process. All genomes cited in this study are available in the NCBI Genbank database (http://www.ncbi.nlm.nih.gov/genbank/) under accession numbers CP001809 and CP001829.
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Ruiz JC, D'Afonseca V, Silva A, et al. Evidence for Reductive Genome Evolution and Lateral Acquisition of Virulence Functions in Two Corynebacterium pseudotuberculosis Strains. PLoS ONE. 2011;6(4): e18551.
Ruiz, J. C., D'Afonseca, V., Silva, A., Ali, A., Pinto, A. C., Santos, A. R., Rocha, A. A. M. C., et al. (2011). Evidence for Reductive Genome Evolution and Lateral Acquisition of Virulence Functions in Two Corynebacterium pseudotuberculosis Strains. PLoS ONE, 6(4): e18551.
Ruiz, J. C., D'Afonseca, V., Silva, A., Ali, A., Pinto, A. C., Santos, A. R., Rocha, A. A. M. C., Lopes, D. O., Dorella, F. A., Pacheco, L. G. C., et al. (2011). Evidence for Reductive Genome Evolution and Lateral Acquisition of Virulence Functions in Two Corynebacterium pseudotuberculosis Strains. PLoS ONE 6:e18551.
Ruiz, J.C., et al., 2011. Evidence for Reductive Genome Evolution and Lateral Acquisition of Virulence Functions in Two Corynebacterium pseudotuberculosis Strains. PLoS ONE, 6(4): e18551.
J.C. Ruiz, et al., “Evidence for Reductive Genome Evolution and Lateral Acquisition of Virulence Functions in Two Corynebacterium pseudotuberculosis Strains”, PLoS ONE, vol. 6, 2011, : e18551.
Ruiz, J.C., D'Afonseca, V., Silva, A., Ali, A., Pinto, A.C., Santos, A.R., Rocha, A.A.M.C., Lopes, D.O., Dorella, F.A., Pacheco, L.G.C., Costa, M.P., Turk, M.Z., Seyffert, N., Moraes, P.M.R.O., Soares, S.C., Almeida, S.S., Castro, T.L.P., Abreu, V.A.C., Trost, E., Baumbach, J., Tauch, A., Schneider, M.P.C., McCulloch, J., Cerdeira, L.T., Ramos, R.T.J., Zerlotini, A., Dominitini, A., Resende, D.M., Coser, E.M., Oliveira, L.M., Pedrosa, A.L., Vieira, C.U., Guimaraes, C.T., Bartholomeu, D.C., Oliveira, D.M., Santos, F.R., Rabelo, E.M., Lobo, F.P., Franco, G.R., Costa, A.F., Castro, I.M., Costa Dias, S.R., Ferro, J.A., Ortega, J.M., Paiva, L.V., Goulart, L.R., Almeida, J.F., Ferro, M.I.T., Carneiro, N.P., Falcao, P.R.K., Grynberg, P., Teixeira, S.M.R., Brommonschenkel, S., Oliveira, S.C., Meyer, R., Moore, R.J., Miyoshi, A., Oliveira, G.C., Azevedo, V.: Evidence for Reductive Genome Evolution and Lateral Acquisition of Virulence Functions in Two Corynebacterium pseudotuberculosis Strains. PLoS ONE. 6, : e18551 (2011).
Ruiz, Jeronimo C., D'Afonseca, Vivian, Silva, Artur, Ali, Amjad, Pinto, Anne C., Santos, Anderson R., Rocha, Aryanne A. M. C., Lopes, Debora O., Dorella, Fernanda A., Pacheco, Luis G. C., Costa, Marcilia P., Turk, Meritxell Z., Seyffert, Nubia, Moraes, Pablo M. R. O., Soares, Siomar C., Almeida, Sintia S., Castro, Thiago L. P., Abreu, Vinicius A. C., Trost, Eva, Baumbach, Jan, Tauch, Andreas, Schneider, Maria Paula C., McCulloch, John, Cerdeira, Louise T., Ramos, Rommel T. J., Zerlotini, Adhemar, Dominitini, Anderson, Resende, Daniela M., Coser, Elisangela M., Oliveira, Luciana M., Pedrosa, Andre L., Vieira, Carlos U., Guimaraes, Claudia T., Bartholomeu, Daniela C., Oliveira, Diana M., Santos, Fabricio R., Rabelo, Elida Mara, Lobo, Francisco P., Franco, Gloria R., Costa, Ana Flavia, Castro, Ieso M., Costa Dias, Silvia Regina, Ferro, Jesus A., Ortega, Jose Miguel, Paiva, Luciano V., Goulart, Luiz R., Almeida, Juliana Franco, Ferro, Maria Ines T., Carneiro, Newton P., Falcao, Paula R. K., Grynberg, Priscila, Teixeira, Santuza M. R., Brommonschenkel, Sergio, Oliveira, Sergio C., Meyer, Roberto, Moore, Robert J., Miyoshi, Anderson, Oliveira, Guilherme C., and Azevedo, Vasco. “Evidence for Reductive Genome Evolution and Lateral Acquisition of Virulence Functions in Two Corynebacterium pseudotuberculosis Strains”. PLoS ONE 6.4 (2011): e18551.
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