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Related Experiment Video

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Multi-enzyme Screening Using a High-throughput Genetic Enzyme Screening System
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High-Throughput Screening Assays for Lipolytic Enzymes.

Alexander Fulton1,2, Marc R Hayes3, Ulrich Schwaneberg4,5

  • 1Institute of Molecular Enzyme Technology, Heinrich-Heine - Universität Düsseldorf, Forschungszentrum Jülich, 52426, Jülich, Germany.

Methods in Molecular Biology (Clifton, N.J.)
|November 1, 2017
PubMed
Summary

This study details enzyme screening methods, focusing on lipolytic enzyme activity assays. Researchers developed new techniques for lipase and esterase characterization and created a variant library to test detergent resistance.

Keywords:
Complete site saturation libraryDetergent toleranceEnantioselectivityEsteraseFluorimetric assaysLipaseScreeningSpectrophotometric assays

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Area of Science:

  • Biochemistry and Molecular Biology
  • Enzyme Engineering and Directed Evolution

Background:

  • Enzyme screening identifies variants with desired properties from large libraries.
  • Primary screening often uses agar plates with indicators or substrates like triolein or tributyrin.
  • High-throughput screening (HTS) typically employs microtiter plates (MTPs) with chromogenic/fluorogenic substrates and automation.

Purpose of the Study:

  • To describe assay systems for determining lipase and esterase activity and enantioselectivity.
  • To report the synthesis of various enzyme substrates.
  • To construct and test a site saturation library of Bacillus subtilis lipase A for detergent tolerance.

Main Methods:

  • Development and application of diverse assay systems for enzyme characterization.
  • Synthesis of specific substrates for lipase and esterase activity determination.
  • Construction of a site saturation library for Bacillus subtilis lipase A.
  • Testing enzyme variants for tolerance against various detergents.

Main Results:

  • Established assay systems for comprehensive lipase and esterase analysis.
  • Successfully synthesized necessary substrates for enzymatic assays.
  • Generated a lipase A variant library and identified amino acids influencing detergent sensitivity/resistance.

Conclusions:

  • The described methods facilitate efficient screening and characterization of lipolytic enzymes.
  • Site saturation mutagenesis is effective for engineering enzymes with improved detergent stability.
  • This approach aids in identifying key amino acid residues for enzyme optimization in industrial applications.