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Protein glycosylation in the phytopathogen Ustilago maydis: From core oligosaccharide synthesis to the ER glycoprotein quality control system, a genomic analysis

AutorFernández-Álvarez, Alfonso ; Elías-Villalobos, Alberto ; Ibeas, José I.
Fecha de publicación2010
CitaciónFungal Genetics and Biology 47(9): 727-735 (2010)
ResumenThe corn smut fungus Ustilago maydis has, over recent decades, become established as a robust pathogenic model for studying fungi–plant relationships. This use of U. maydis can be attributed to its biotrophic host interaction, easy culture and genetic manipulation in the laboratory, and the severe disease symptoms it induces in infected maize. Recent studies have shown that normal protein glycosylation is essential for pathogenic development, but dispensable for the saprophytic growth or mating. Given the relevance of protein glycosylation for U. maydis virulence, and consequently its role in the plant pathogenesis, here we review the main actors and events implicated in protein glycosylation. Furthermore, we describe the results of an in silico search, where we identify all the conserved members of the N- and O-glycosylation pathways in U. maydis at each stage: core oligosaccharide synthesis, addition of the core oligosaccharide to nascent target proteins, maturation and extension of the core oligosaccharide, and the quality control system used by the cell to avoid the presence of unfolded glycoproteins. Finally, we discuss how these genes could affect U. maydis virulence and their biotechnological implications.
Identificadoresdoi: 10.1016/j.fgb.2010.06.004
issn: 1087-1845
e-issn: 1096-0937
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