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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Archives of microbiology 72 (1970), S. 60-67 
    ISSN: 1432-072X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Zusammenfassung Die Konzentration an Acetaldehyd im Medium während der anaeroben Vergärung von Glucose durch Saccharomyces cerevisiae weist in der logarithmischen Wachstumsphase die höchsten Werte auf. Die Induktion der Pyruvatdecarboxylase durch Glucose fördert die Akkumulation von Acetaldehyd, der ins Medium diffundiert. Hefestämme, die unterschiedlich viel Acetaldehyd bilden, unterscheiden sich in ihren Pyruvatdecarboxylaseaktivitäten. Diese engen Beziehungen zwischen Pyruvatdecarboxylase und Acetaldehydproduktion deuten auf die Kontrollfunktion der Pyruvatdecarboxylase bei der Acetaldehydakkumulation hin. Höhere Aktivitäten der Alkoholdehydrogenase verringern die Acetaldehydakkumulation, wodurch sich ein Hinweis auf die Rolle dieses Enzyms bei der Regulation der Acetaldehydkonzentration ergibt.
    Notes: Summary During fermentation of glucose by Saccharomyces cerevisiae maximum acetaldehyde production coincides with maximum pyruvate decarboxylase activity in the logarithmic phase of growth. The stimulation of this enzyme by high glucose levels leads to an increased formation of acetaldehyde, which diffuses into the medium. Yeast strains, which produce varying amounts of acetaldehyde also exhibited varying pyruvate decarboxylase activities. The close relationship between pyruvate decarboxylase activity and acetaldehyde production suggests a control function of the enzyme in acetaldehyde accumulation. Apart from pyruvate decarboxylase higher activities of alcohol dehydrogenase show the reversed influence on aldehyde concentration, thus demonstrating the role of alcohol dehydrogenase in aldehyde production.
    Type of Medium: Electronic Resource
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