Functional annotation of the Ophiostoma novo-ulmi genome: insights into the phytopathogenicity of the fungal agent of Dutch elm disease.

Autor:	Comeau AM; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Québec, Canada Centre d'Étude de la Forêt (CEF), Université Laval, Québec, Québec, Canada Present address: Department of Pharmacology, Dalhousie University, Halifax, NS, Canada., Dufour J; Centre d'Étude de la Forêt (CEF), Université Laval, Québec, Québec, Canada., Bouvet GF; Institut de Recherches Cliniques de Montréal (IRCM), Montréal, Québec, Canada., Jacobi V; Centre d'Étude de la Forêt (CEF), Université Laval, Québec, Québec, Canada., Nigg M; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Québec, Canada Centre d'Étude de la Forêt (CEF), Université Laval, Québec, Québec, Canada., Henrissat B; Centre National de la Recherche Scientifique (CNRS), UMR7257, Université Aix-Marseille, France Department of Biological Sciences, King Abdulaziz University, Jeddah, Saudi Arabia., Laroche J; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Québec, Canada., Levesque RC; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Québec, Canada Département de Microbiologie-Infectiologie et Immunologie, Faculté de Médecine, Université Laval, Québec, Québec, Canada., Bernier L; Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Québec, Canada Centre d'Étude de la Forêt (CEF), Université Laval, Québec, Québec, Canada louis.bernier@sbf.ulaval.ca.
Jazyk:	angličtina
Zdroj:	Genome biology and evolution [Genome Biol Evol] 2014 Dec 24; Vol. 7 (2), pp. 410-30. Date of Electronic Publication: 2014 Dec 24.
DOI:	10.1093/gbe/evu281
Abstrakt:	The ascomycete fungus Ophiostoma novo-ulmi is responsible for the pandemic of Dutch elm disease that has been ravaging Europe and North America for 50 years. We proceeded to annotate the genome of the O. novo-ulmi strain H327 that was sequenced in 2012. The 31.784-Mb nuclear genome (50.1% GC) is organized into 8 chromosomes containing a total of 8,640 protein-coding genes that we validated with RNA sequencing analysis. Approximately 53% of these genes have their closest match to Grosmannia clavigera kw1407, followed by 36% in other close Sordariomycetes, 5% in other Pezizomycotina, and surprisingly few (5%) orphans. A relatively small portion (∼3.4%) of the genome is occupied by repeat sequences; however, the mechanism of repeat-induced point mutation appears active in this genome. Approximately 76% of the proteins could be assigned functions using Gene Ontology analysis; we identified 311 carbohydrate-active enzymes, 48 cytochrome P450s, and 1,731 proteins potentially involved in pathogen-host interaction, along with 7 clusters of fungal secondary metabolites. Complementary mating-type locus sequencing, mating tests, and culturing in the presence of elm terpenes were conducted. Our analysis identified a specific genetic arsenal impacting the sexual and vegetative growth, phytopathogenicity, and signaling/plant-defense-degradation relationship between O. novo-ulmi and its elm host and insect vectors. (© The Author(s) 2014. Published by Oxford University Press on behalf of the Society for Molecular Biology and Evolution.)
Databáze:	MEDLINE
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