Killer toxin of Hanseniaspora uvarum.
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.
Institut für Mikrobiologie und Weinforschung der Johannes Gutenberg-Universität, Mainz, Federal Republic of Germany.
F
F
Radler
M J
MJ
Schmitt
B
B
Meyer
D001665:Binding Sites; D002473:Cell Wall / Q000378:metabolism; D002852:Chromatography, Ion Exchange; D004591:Electrophoresis, Polyacrylamide Gel; D005656:Fungal Proteins / Q000096:biosynthesis* / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology; D005936:Glucans / Q000378:metabolism; D006031:Glycosylation; D007526:Isoelectric Point; D055646:Killer Factors, Yeast; D009183:Mycotoxins / Q000096:biosynthesis* / Q000302:isolation & purification / Q000378:metabolism / Q000494:pharmacology; D012441:Saccharomyces cerevisiae / Q000378:metabolism / Q000502:physiology* / Q000648:ultrastructure; D029701:Saccharomyces cerevisiae Proteins; D004718:Saccharomycetales / Q000378:metabolism*
D005656:Fungal Proteins; D005936:Glucans; D055646:Killer Factors, Yeast; D009183:Mycotoxins; D029701:Saccharomyces cerevisiae Proteins