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Updated: Dec 22, 2025

A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes

A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes

Published on: November 7, 2012

A paper-based whole-cell screening assay for directed evolution-driven enzyme engineering.

Ijaz Gul¹, Tadesse Fantaye Bogale¹, Yong Chen¹

¹School of Life Science and Technology, University of Electronic Science and Technology of China, No. 4, Section 2, North Jianshe Road, Chengdu, 610054, China.

Applied Microbiology and Biotechnology

|May 6, 2020

Summary

This summary is machine-generated.

A new paper-based method enables high-throughput screening for directed enzyme evolution, significantly reducing reagent use and costs. This frugal approach successfully identified improved enzyme variants using smartphone imaging for quantitative analysis.

Keywords:

Directed evolution Halohydrin dehalogenase Library screening Paper-based assay Smartphone imaging

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Last Updated: Dec 22, 2025

A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes

A New Screening Method for the Directed Evolution of Thermostable Bacteriolytic Enzymes

Published on: November 7, 2012

Multi-enzyme Screening Using a High-throughput Genetic Enzyme Screening System

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Directed Evolution Method in Saccharomyces cerevisiae: Mutant Library Creation and Screening

Directed Evolution Method in Saccharomyces cerevisiae: Mutant Library Creation and Screening

Published on: April 1, 2016

Area of Science:

Biotechnology
Enzyme Engineering
Biocatalysis

Background:

Directed evolution is crucial for tailoring enzymes but often requires large reagent volumes and specialized equipment.
Existing methods for enzyme screening can be resource-intensive, limiting their widespread application.
Developing cost-effective and accessible screening platforms is essential for advancing enzyme engineering.

Purpose of the Study:

To develop a frugal, paper-based high-throughput screening method for directed enzyme evolution.
To enable efficient screening of mutagenesis libraries with reduced reagent consumption and assay time.
To demonstrate the utility of smartphone imaging for quantitative enzyme activity measurement.

Main Methods:

A paper-based whole-cell screening assay was developed using halohydrin dehalogenase as a model enzyme.
Quantitative measurements were performed using smartphone photography and ImageJ software for color intensity analysis.
The method was validated against a gold standard and applied to screen a mutagenesis library.

Main Results:

The paper-based assay successfully screened mutagenesis libraries, identifying two active enzyme mutants (P135A and G137A) with enhanced activities.
The assay demonstrated reduced reagent consumption (≤10 μl per assay) and a shorter assay time compared to conventional methods.
Smartphone-based digital image colorimetry provided reliable quantitative measurements of enzyme activity.

Conclusions:

Paper-based whole-cell screening coupled with smartphone imaging offers a cost-effective and efficient platform for directed enzyme evolution.
This frugal approach democratizes enzyme engineering by minimizing the need for expensive instrumentation and reagents.
The developed method holds significant potential for discovering industrially relevant enzymes for various applications.