6533b821fe1ef96bd127af9b

RESEARCH PRODUCT

Killer toxin of Hanseniaspora uvarum

F. RadlerBrigitte MeyerManfred J. Schmitt

subject

GlycosylationSaccharomyces cerevisiae ProteinsSaccharomyces cerevisiaechemical and pharmacologic phenomenaSaccharomyces cerevisiaemedicine.disease_causeHanseniasporaBiochemistryMicrobiologyMicrobiologyFungal Proteinschemistry.chemical_compoundCell WallGeneticsmedicineExtracellularSecretionIsoelectric PointGlucansMolecular BiologyBinding SitesbiologyMolecular massToxinGeneral MedicineTunicamycinMycotoxinsChromatography Ion Exchangebiology.organism_classificationKiller Factors YeastYeastBiochemistrychemistrySaccharomycetalesElectrophoresis Polyacrylamide Gel

description

The yeast Hanseniaspora uvarum liberates a killer toxin lethal to sensitive strains of the species Saccharomyces cerevisiae. Secretion of this killer toxin was inhibited by tunicamycin, an inhibitor of N-glycosylation, although the mature killer protein did not show any detectable carbohydrate structures. Culture supernatants of the killer strain were concentrated by ultrafiltration and the extracellular killer toxin was precipitated with ethanol and purified by ion exchange chromatography. SDS-PAGE of the electrophoretically homogenous killer protein indicated an apparent molecular mass of 18,000. Additional investigations of the primary toxin binding sites within the cell wall of sensitive yeast strains showed that the killer toxin of Hanseniaspora uvarum is bound by beta-1, 6-D-glucans.

yearjournalcountryeditionlanguage
1990-07-01Archives of Microbiology
https://doi.org/10.1007/bf00423329