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6. Insights from the genome of the biotrophic fungal plant pathogen Ustilago maydis

Author

Kamper, Jorg, Kahmann, Regine, Bolker, Michael, Ma, Li-Jun, Brefort, Thomas, Saville, Barry J., Banuett, Flora, Kronstad, James W., Gold, Scott E., Muller, Olaf, Perlin, Michael H., Wosten, Han A. B., de Vries, Ronald, Ruiz-Herrera, Jose, Reynaga-Pena, Cristina G., Snetselaar, Karen, McCann, Michael, Perez-Martin, Jose, Feldbrugge, Michael, Basse, Christoph W., Steinberg, Gero, Ibeas, Jose I., Holloman, William, Guzman, Plinio, Farman, Mark, Stajich, Jason E., Sentandreu, Rafael, Gonzalez-Prieto, Juan M., Kennell, John C., Molina, Lazaro, Schirawski, Jan, Mendoza-Mendoza, Artemio, Greilinger, Doris, Munch, Karin, Rossel, Nicole, Scherer, Mario, Vraneš, Miroslav, Ladendorf, Oliver, Vincon, Volker, Fuchs, Uta, Sandrock, Bjorn, Meng, Shaowu, Ho, Eric C. H., Cahill, Matt J., Boyce, Kylie J., Klose, Jana, Klosterman, Steven J., Deelstra, Heine J., Ortiz-Castellanos, Lucila, Li, Weixi, Sanchez-Alonso, Patricia, Schreier, Peter H., Hauser-Hahn, Isolde, Vaupel, Martin, Koopmann, Edda, Friedrich, Gabi, Voss, Hartmut, Schluter, Thomas, Margolis, Jonathan, Platt, Darren, Swimmer, Candace, Gnirke, Andreas, Chen, Feng, Vysotskaia, Valentina, Mannhaupt, Gertrud, Guldener, Ulrich, Munsterkotter, Martin, Haase, Dirk, Oesterheld, Matthias, Mewes, Hans-Werner, Mauceli, Evan W., DeCaprio, David, Wade, Claire M., Butler, Jonathan, Young, Sarah, Jaffe, David B., Calvo, Sarah, Nusbaum, Chad, Galagan, James, and Birren, Bruce W.

Abstract

Author(s): Jörg Kämper (corresponding author) [1]; Regine Kahmann (corresponding author) [1]; Michael Bölker (corresponding author) [2]; Li-Jun Ma [3]; Thomas Brefort [1]; Barry J. Saville [4, 27]; Flora Banuett [5]; [...]

Published
2006
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9. Insights from the genome of the biotrophic fungal plant pathogen Ustilago maydis

Author

National Human Genome Research Institute (US), Bayer, National Institutes of Health (US), Federal Ministry of Education and Research (Germany), Max Planck Society, Natural Sciences and Engineering Research Council of Canada, Canada Foundation for Innovation, Consejo Nacional de Humanidades, Ciencias y Tecnologías (México), Alexander von Humboldt Foundation, European Commission, Kämper, Jörg, Kahmann, Regine, Bölker, Michael, Ma, Li-Jun, Brefort, Thomas, Saville, Barry J., Banuett, Flora, Kronstad, James W., Gold, Scott E., Müller, Olaf, Perlin, Michael H., Wösten, Han A. B., Vries, Ronald de, Ruiz-Herrera, José, Reynaga-Peña, Cristina G., Snetselaar, Karen, McCann, Michael, Pérez-Martín, José, Feldbrügge, Michael, Basse, Christoph W., Steinberg, Gero, Ibeas, Jose I., Holloman, William K., Guzman, Plinio, Farman, Mark, Stajich, Jason E., Sentandreu, Rafael, González-Prieto, Juan M., Kennell, John C., Molina Delgado, Lázaro, Schirawski, Jan, Mendoza-Mendoza, Artemio, Greilinger, Doris, Münch, Karin, Rössel, Nicole, Scherer, Mario, Vraneš, Miroslav, Ladendorf, Oliver, Vincon, Volker, Fuchs, Uta, Sandrock, Björn, Meng, Shaowu, Ho, Eric C. H., Cahill, Matt J., Boyce, Kylie J., Klose, Jana, Klosterman, Steven J., Deelstra, Heine J., Ortiz-Castellanos, Lucila, Li, Weixi, Sanchez-Alonso, Patricia, Schreier, Peter H., Häuser-Hahn, Isolde, Vaupel, Martin, Koopmann, Edda, Friedrich, Gabi, Voss, Hartmut, Schlüter, Thomas, Margolis, Jonathan, Platt, Darren, Swimmer, Candace, Gnirke, Andreas, Chen, Feng, Vysotskaia, Valentina, Mannhaupt, Gertrud, Güldener, Ulrich, Münsterkötter, Martin, Haase, Dirk, Oesterheld, Matthias, Mewes, Hans-Werner, Mauceli, Evan W., DeCaprio, David, Wade, Claire M., Butler, Jonathan, Young, Sarah, Jaffe, David B., Calvo, Sarah, Nusbaum, Chad, Galagan, James, Birren, Bruce W., National Human Genome Research Institute (US), Bayer, National Institutes of Health (US), Federal Ministry of Education and Research (Germany), Max Planck Society, Natural Sciences and Engineering Research Council of Canada, Canada Foundation for Innovation, Consejo Nacional de Humanidades, Ciencias y Tecnologías (México), Alexander von Humboldt Foundation, European Commission, Kämper, Jörg, Kahmann, Regine, Bölker, Michael, Ma, Li-Jun, Brefort, Thomas, Saville, Barry J., Banuett, Flora, Kronstad, James W., Gold, Scott E., Müller, Olaf, Perlin, Michael H., Wösten, Han A. B., Vries, Ronald de, Ruiz-Herrera, José, Reynaga-Peña, Cristina G., Snetselaar, Karen, McCann, Michael, Pérez-Martín, José, Feldbrügge, Michael, Basse, Christoph W., Steinberg, Gero, Ibeas, Jose I., Holloman, William K., Guzman, Plinio, Farman, Mark, Stajich, Jason E., Sentandreu, Rafael, González-Prieto, Juan M., Kennell, John C., Molina Delgado, Lázaro, Schirawski, Jan, Mendoza-Mendoza, Artemio, Greilinger, Doris, Münch, Karin, Rössel, Nicole, Scherer, Mario, Vraneš, Miroslav, Ladendorf, Oliver, Vincon, Volker, Fuchs, Uta, Sandrock, Björn, Meng, Shaowu, Ho, Eric C. H., Cahill, Matt J., Boyce, Kylie J., Klose, Jana, Klosterman, Steven J., Deelstra, Heine J., Ortiz-Castellanos, Lucila, Li, Weixi, Sanchez-Alonso, Patricia, Schreier, Peter H., Häuser-Hahn, Isolde, Vaupel, Martin, Koopmann, Edda, Friedrich, Gabi, Voss, Hartmut, Schlüter, Thomas, Margolis, Jonathan, Platt, Darren, Swimmer, Candace, Gnirke, Andreas, Chen, Feng, Vysotskaia, Valentina, Mannhaupt, Gertrud, Güldener, Ulrich, Münsterkötter, Martin, Haase, Dirk, Oesterheld, Matthias, Mewes, Hans-Werner, Mauceli, Evan W., DeCaprio, David, Wade, Claire M., Butler, Jonathan, Young, Sarah, Jaffe, David B., Calvo, Sarah, Nusbaum, Chad, Galagan, James, and Birren, Bruce W.

Abstract

Ustilago maydis is a ubiquitous pathogen of maize and a well-established model organism for the study of plant-microbe interactions. This basidiomycete fungus does not use aggressive virulence strategies to kill its host. U. maydis belongs to the group of biotrophic parasites (the smuts) that depend on living tissue for proliferation and development. Here we report the genome sequence for a member of this economically important group of biotrophic fungi. The 20.5-million-base U. maydis genome assembly contains 6,902 predicted protein-encoding genes and lacks pathogenicity signatures found in the genomes of aggressive pathogenic fungi, for example a battery of cell-wall-degrading enzymes. However, we detected unexpected genomic features responsible for the pathogenicity of this organism. Specifically, we found 12 clusters of genes encoding small secreted proteins with unknown function. A significant fraction of these genes exists in small gene families. Expression analysis showed that most of the genes contained in these clusters are regulated together and induced in infected tissue. Deletion of individual clusters altered the virulence of U. maydis in five cases, ranging from a complete lack of symptoms to hypervirulence. Despite years of research into the mechanism of pathogenicity in U. maydis, no 'true' virulence factors had been previously identified. Thus, the discovery of the secreted protein gene clusters and the functional demonstration of their decisive role in the infection process illuminate previously unknown mechanisms of pathogenicity operating in biotrophic fungi. Genomic analysis is, similarly, likely to open up new avenues for the discovery of virulence determinants in other pathogens. ©2006 Nature Publishing Group.

Published
2006

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