Production of functional killer protein in batch cultures upon a shift from aerobic to anaerobic conditions
Braz. arch. biol. technol
; 54(3): 601-612, May-June 2011. ilus, graf
Article
in English
| LILACS
| ID: lil-591203
Responsible library:
BR1.1
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.
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Collection:
International databases
Database:
LILACS
Language:
English
Journal:
Braz. arch. biol. technol
Journal subject:
Biology
Year:
2011
Document type:
Article
Affiliation country:
Brazil
Institution/Affiliation country:
Empresa Brasileira de Pesquisa Agropecuária/BR
/
Universidade Federal do Rio Grande do Sul/BR