Covalent association of beta-1,3-glucan with beta-1,6-glucosylated mannoproteins in cell walls of Candida albicans - PubMed (original) (raw)

Covalent association of beta-1,3-glucan with beta-1,6-glucosylated mannoproteins in cell walls of Candida albicans

J C Kapteyn et al. J Bacteriol. 1995 Jul.

Abstract

Yeast and hyphal walls of Candida albicans were extracted with sodium dodecyl sulfate (SDS). Some of the extracted proteins reacted with a specific beta-1,6-glucan antiserum but not with a beta-1,3-glucan antiserum. They lost their beta-1,6-glucan epitope after treatment with ice-cold aqueous hydrofluoric acid, suggesting that beta-1,6-glucan was linked to the protein through a phosphodiester bridge. When yeast and hyphal walls extracted with SDS were subsequently extracted with a pure beta-1,3-glucanase, several mannoproteins that were recognized by both the beta-1,6-glucan antiserum and the beta-1,3-glucan antiserum were released. Both epitopes were sensitive to aqueous hydrofluoric acid treatment, suggesting that beta-1,3-glucan and beta-1,6-glucan are linked to proteins by phosphodiester linkages. The possible role of beta-glucans in the retention of cell wall proteins is discussed.

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