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Related Experiment Videos

Specific and sensitive plate assay for bacterial lipases.

G Kouker, K E Jaeger

    Applied and Environmental Microbiology
    |January 1, 1987
    PubMed
    Summary

    A new plate assay detects bacterial lipase activity using a fluorescent dye. This method quantifies lipase levels by measuring the diameter of fluorescent halos around bacterial colonies.

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    Area of Science:

    • Microbiology
    • Enzymology

    Background:

    • Bacterial lipase is crucial in various industrial applications.
    • Accurate quantification of lipase activity is essential for research and development.

    Purpose of the Study:

    • To develop a novel, sensitive plate assay for detecting and quantifying bacterial lipase activity.
    • To establish a reliable method for enzyme activity measurement in bacterial cultures.

    Main Methods:

    • A plate assay utilizing trioleoylglycerol as a substrate and rhodamine B as a fluorescent indicator.
    • Detection of orange fluorescent halos around bacterial colonies under UV irradiation.
    • Correlation of halo diameter with lipase activity in cell-free supernatants.

    Main Results:

    • The assay successfully detects bacterial lipase activity.
    • Hydrolysis of trioleoylglycerol by lipase produces distinct fluorescent halos.
    • A linear correlation was observed between the logarithm of lipase activity and halo diameter.
    • Quantitation of lipase activity within the range of 1 to 30 nkat is achievable.

    Conclusions:

    • The presented plate assay offers a simple and effective method for bacterial lipase detection and quantification.
    • This assay facilitates the screening and characterization of lipase-producing bacteria.
    • The method provides a reliable tool for enzyme activity measurement in microbiological studies.

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