TY - JOUR A1 - Lévesque, C. André A1 - Brouwer, Henk A1 - Cano, Liliana A1 - Hamilton, John P. A1 - Holt, Carson A1 - Huitema, Edgar A1 - Raffaele, Sylvain A1 - Robideau, Gregg P. A1 - Thines, Marco A1 - Win, Joe A1 - Zerillo, Marcelo M. A1 - Beakes, Gordon W. A1 - Boore, Jeffrey L. A1 - Busam, Dana A1 - Dumas, Bernard A1 - Ferriera, Steve A1 - Fürstenberg, Susan A1 - Gachon, Claire M. M. A1 - Gaulin, Elodie A1 - Govers, Francine A1 - Grenville-Briggs, Laura A1 - Horner, Neil A1 - Hostetler, Jessica A1 - Jiang, Rays H. Y. A1 - Johnson, Justin A1 - Krajaejun, Theerapong A1 - Lin, Haining A1 - Meijer, Harold J. G. A1 - Moore, Barry A1 - Morris, Paul A1 - Phuntmart, Vipaporn A1 - Puiu, Daniela A1 - Shetty, Jyoti A1 - Stajich, Jason E. A1 - Tripathy, Sucheta A1 - Wawra, Stephan A1 - West, Pieter van A1 - Whitty, Brett R. A1 - Coutinho, Pedro M. A1 - Henrissat, Bernard A1 - Martin, Frank A1 - Thomas, Paul D. A1 - Tyler, Brett M. A1 - Vries, Ronald Peter de A1 - Kamoun, Sophien A1 - Yandell, Mark A1 - Tisserat, Ned A1 - Buell, C. Robin T1 - Genome sequence of the necrotrophic plant pathogen Pythium ultimum reveals original pathogenicity mechanisms and effector repertoire T2 - Genome biology N2 - Background: Pythium ultimum (P. ultimum) is a ubiquitous oomycete plant pathogen responsible for a variety of diseases on a broad range of crop and ornamental species. Results: The P. ultimum genome (42.8 Mb) encodes 15,290 genes and has extensive sequence similarity and synteny with related Phytophthora species, including the potato blight pathogen Phytophthora infestans. Whole transcriptome sequencing revealed expression of 86% of genes, with detectable differential expression of suites of genes under abiotic stress and in the presence of a host. The predicted proteome includes a large repertoire of proteins involved in plant pathogen interactions although surprisingly, the P. ultimum genome does not encode any classical RXLR effectors and relatively few Crinkler genes in comparison to related phytopathogenic oomycetes. A lower number of enzymes involved in carbohydrate metabolism were present compared to Phytophthora species, with the notable absence of cutinases, suggesting a significant difference in virulence mechanisms between P. ultimum and more host specific oomycete species. Although we observed a high degree of orthology with Phytophthora genomes, there were novel features of the P. ultimum proteome including an expansion of genes involved in proteolysis and genes unique to Pythium. We identified a small gene family of cadherins, proteins involved in cell adhesion, the first report in a genome outside the metazoans. Conclusions: Access to the P. ultimum genome has revealed not only core pathogenic mechanisms within the oomycetes but also lineage specific genes associated with the alternative virulence and lifestyles found within the pythiaceous lineages compared to the Peronosporaceae. Y1 - 2010 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/7915 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30-78353 UR - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2926784 SN - 1465-6914 SN - 1465-6906 N1 - © 2010 Lévesque et al.; licensee BioMed Central Ltd. This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. VL - 11 IS - R73 SP - 1 EP - 22 PB - BioMed Central CY - London ER -