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[Alkaline protease production]

R Daguerre, C M Cuevas, L A Mazza

    Revista De La Asociacion Argentina De Microbiologia
    |May 1, 1975
    PubMed
    Summary
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    Optimizing culture medium enhanced alkaline protease production. The study identified optimal lactose and bactopeptone concentrations for maximum enzyme yield.

    Area of Science:

    • Biotechnology
    • Enzyme Technology
    • Microbial Fermentation

    Background:

    • Alkaline proteases are industrially significant enzymes.
    • Optimizing culture conditions is crucial for maximizing enzyme production.
    • Previous studies have explored various factors affecting protease synthesis.

    Purpose of the Study:

    • To investigate the influence of culture medium composition on alkaline protease production.
    • To determine the optimal concentrations of carbon sources (lactose) and nitrogen sources (bactopeptone).
    • To identify the ideal overall medium formulation for enhanced alkaline protease yield.

    Main Methods:

    • Screening of various carbon sources including glycerol, glucose, lactose, and starch.
    • Testing different concentrations of lactose and bactopeptone.

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  • Cultivation in shake flasks under controlled conditions.
  • Analysis of cell concentration and alkaline protease activity over time.

    • Main Results:

    • The optimal medium composition included specific concentrations of lactose, bactopeptone, and various salts.
    • Maximum cell concentration (approx. 9.5 g/l) was achieved after 30 hours of cultivation.
    • Peak alkaline protease production (5,000 uAPAM/ml) was observed at 60 hours.

    Conclusions:

    • The defined medium composition significantly enhances alkaline protease production.
    • Lactose and bactopeptone are key components influencing enzyme yield.
    • The findings provide a basis for large-scale microbial production of alkaline protease.