Metabolism of glycoprotein-derived sialic acid and N-acetylglucosamine by Streptococcus oralis

Article Abstract:

Streptococcus oralis cells isolated from the oral flora or from patients with endocarditis produce N-acetylglucosaminidase and sialidase, when grown in a culture containing glycoproteins. These glycosidases are required for the degradation of glycoproteins. The cells also produce enzymes that degrade N-acetylneuraminic acid and N-acetylglucosamine, which are produced by the activity of the glycosidases. The results of the study show that S. oralis is able to metabolize the glycoproteins of the host and assimilate the carbohydrates formed.

Research, Observations, Glycoproteins, Streptococcus, Microbial metabolism, Microbial enzymes

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Cell wall protein and glycoprotein constituents of Aspergillus fumigatus that bind to polystyrene may be responsible for the cell surface hydrophobicity of the mycelium

Article Abstract:

Aspergillus fumigatus shows strong cell surface hydrophobicity regardless of the culture medium. Cell-wall-bound glycoproteins and proteins, released by treatment of cells with beta-mercaptoethanol, may be responsible for this property in the fungal species. The property of cell surface hydrophobicity influence the pathogenicity and virulence of the species.

Analysis, Proteins, Plant cell membranes

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Differences in sialic acid density in pathogenic and non-pathogenic Aspergillus species

Article Abstract:

Results show that Aspergillus fumigatus possesses sialic acids on the surface of conidia, which facilitates conidia adhesion to fibronectin. Data also indicate that pathogenic A. fumigatus exhibit greater sialic density than the non-pathogenic species.

Canada, Statistical Data Included, Microorganisms, Microbial adhesion, Sialic acids

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