Screening cDNA libraries with polyclonal antibody preparations against yeast or mycelial cell walls resulted in isolation of several positive clones. Some of them encoded enolase; others encoded a protein of the 70 kDa heat-shock protein family (Hsp70p), etc. The presence of these cytosolic proteins in the cell wall of actively growing was discovered by analytical (SDS-PAGE and Western blot) and cytological (indirect immunofluorescence) experiments. Supplementation of cell cultures with papulacandin B, an antibiotic that inhibits formation of the β-glucan skeleton, resulted in the release of enolase to the supernatant fluids; this release was prevented when 0.6 M KCI was present as an osmotic stabilizer. The cell wall of incorporated exogenously added proteins (enolase and and cytosolic proteins). The presence in the cell wall of enolase, Hsp70p, and probably other intracellular proteins that are highly immunogenic might help the fungal cells to evade the host defences, and consequently could represent a survival mechanism for


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