Extracellular serine protease synthesis by mosquito-pathogenic strains of Bacillus sphaericus

C. Dumusois, F. G. Priest

    Research output: Contribution to journalArticle

    Abstract

    Nine strains of Bacillus sphaericus toxic to mosquito larvae produced haloes of hydrolysis when cultured on casein-nutrient agar. In batch culture, protease synthesis by B. sphaericus BSE 18 occurred during exponential growth and was repressed by high concentrations of peptone. Extracellular protease from this bacterium showed optimal activity at about pH 10.2, was inhibited by phenylmethylsulphonyl chloride and chymostatin but not soybean trypsin inhibitor or EDTA. Hydrolysis of N-CBZ-glycine-nitrophenyl ester was consistent with the major enzyme being a serine protease.

    Original languageEnglish
    Pages (from-to)416-419
    Number of pages4
    JournalJournal of Applied Bacteriology
    Volume75
    Issue number5
    Publication statusPublished - 1993

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