Various characteristics of growth kinetics and exohydrolase synthesis in Aspergillus foetidus and Zygofabospora marxiana
Astapovich, N.I.; Ermolitskiĭ, V.N.; Lobanok, A.G.; Lebedev, V.V.
Mikrobiologiia 54(2): 280-283
1985
ISSN/ISBN: 0026-3656 PMID: 3892247 Document Number: 260071
The kinetics of growth and synthesis of exohydrolases (polygalacturonases and proteinases) were studied in Aspergillus foetidus and Zygofabospora marxiana. The processes of growth and synthesis of polygalacturonases were found to be shifted in time. Endopolymethylgalacturonase of the micromycete and endopolygalacturonase of the yeast are not accumulated in the cells, but are mainly secreted into the growth medium. The maximal value of polygalacturonase bound to the cell coincides with the maximal rate of synthesis of the enzyme secreted into the medium and with the maximal level of cell-bound alkaline and acid proteinases. The activity of alkaline proteinase is not found in the growth medium of the cultures, and only traces of acid proteinase were detected. It is possible that proteinase are involved in processing of endopolygalacturonases.