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Production of functional killer protein in batch cultures upon a shift from aerobic to anaerobic conditions

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Production of functional killer protein in batch cultures upon a shift from aerobic to anaerobic conditions

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Título Production of functional killer protein in batch cultures upon a shift from aerobic to anaerobic conditions
Autor Silva, Gildo Almeida da
Poli, Jandora Severo
Poletto, Carolina Madalozzo
Schaker, Patricia Dayane Carvalho
Silva, Patrícia Valente da
Abstract The aim of this work was to study the production of functional protein in yeast culture. The cells of Saccharomyces cerevisiae Embrapa 1B (K+R+) killed a strain of Saccharomyces cerevisiae Embrapa 26B (K-R-)in grape must and YEPD media. The lethal effect of toxin-containing supernatant and the effect of aeration upon functional killer production and the correlation between the products of anaerobic metabolism and the functional toxin formation were evaluated. The results showed that at low sugar concentration, the toxin of the killer strain of Sacch. cerevisiae was only produced under anaerobic conditions . The system of killer protein production showed to be regulated by Pasteur and Crabtree effects. As soon as the ethanol was formed, the functional killer toxin was produced. The synthesis of the active killer toxin seemed to be somewhat associated with the switch to fermentation process and with concomitant alcohol dehydrogenase (ADH) activity.
Contido em Brazilian archives of biology and technology. Curitiba. Vol. 54, n. 3 (maio/jun. 2011), p. 601-612
Assunto Leveduras
Saccharomyces cerevisiae
Vitis
[en] Crabtree effect
[en] Inhibition
[en] Killer yeast
[en] Mycocinogenic strain
[en] Pasteur effect
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/108619
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