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Título
Analyses of Extracellular Carbohydrates in Oomycetes Unveil the Existence of Three Different Cell Wall Types
Autor
Facultad/Centro
Área de conocimiento
Título de la revista
Eukaryotic Cell
Número de la revista
2
Cita Bibliográfica
Mélida, H., Sandoval-Sierra, J. V., Diéguez-Uribeondo, J., & Bulone, V. (2013). Analyses of extracellular carbohydrates in oomycetes unveil the existence of three different cell wall types. Eukaryotic Cell, 12(2), 194-203. https://doi.org/10.1128/EC.00288-12
Editorial
American Society for Microbiology
Fecha
2013
ISSN
1535-9778
Resumen
[EN] Some of the most devastating plant and animal pathogens belong to the oomycete class. The cell walls of these microorganisms
represent an excellent target for disease control, but their carbohydrate composition is elusive. We have undertaken a detailed
cell wall analysis in 10 species from 2 major oomycete orders, the Peronosporales and the Saprolegniales, thereby unveiling the
existence of 3 clearly different cell wall types: type I is devoid of N-acetylglucosamine (GlcNAc) but contains glucuronic acid and
mannose; type II contains up to 5% GlcNAc and residues indicative of cross-links between cellulose and 1,3- -glucans; type III is
characterized by the highest GlcNAc content (>5%) and the occurrence of unusual carbohydrates that consist of 1,6-linked
GlcNAc residues. These 3 cell wall types are also distinguishable by their cellulose content and the fine structure of their 1,3- -
glucans. We propose a cell wall paradigm for oomycetes that can serve as a basis for the establishment of cell wall architectural
models and the further identification of cell wall subtypes. This paradigm is complementary to morphological and molecular
criteria for taxonomic grouping and provides useful information for unraveling poorly understood cell wall carbohydrate
biosynthetic pathways through the identification and characterization of the corresponding enzymes.
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