The effect of yeast dehydration on the activity of a number of enzymes of cell energetic metabolism |
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Authors: | I L Krallish B E Damberga M J Beker |
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Institution: | (1) August Kirchenstein Institute of Microbiology, Latvian SSR Academy of Sciences, Riga, USSR;(2) Laboratory of Technical Microbiology, August Kirchenstein Institute of Microbiology, Latvian SSR Academy of Sciences, Kleisti, 226067 Riga, Latvian SSR, USSR |
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Abstract: | Summary It has been shown that dehydration markedly affects the activity of a number of enzymes connected with energy metabolism in
the yeastSaccharomyces cerevisiae. Independently of the drying method used, there was found to be an inverse relationship between the activity of mitochondrial
enzymes — NADH-dehydrogenase (EC 1.6.2.1), succinate dehydrogenase (EC 1.3.99.1) and cytochrome C oxidase (EC 1.9.3.1) - and
the viability of yeast cells at the stationary growth phase. Dehydration led to an increase in activity only in exogenous
NADH-dehydrogenase compared with activity in the initial compressed yeast.
On the basis of alcohol dehydrogenase (EC 1.1.1.1) and catalase (EC 1.11.1.6) as examples, an ambivalent effect of the dehydration
process on the activity of cytoplasmic enzymes has been demonstrated.
The results obtained lead to the conclusion that the activity of individual electron-transport enzymes in yeastSaccharomyces cerevisiae is a sufficiently sensitive to be used as an indicator of the physiological state and to monitor a microbial biomass dehydration
procedure. |
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