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Updated: May 5, 2026

Detection of Bacteria Using Fluorogenic DNAzymes

Detection of Bacteria Using Fluorogenic DNAzymes

Published on: May 28, 2012

Fluorescent tools for the standardized work in Gram-negative bacteria.

Mario Delgadillo-Guevara^1,2, Manuel Halte¹, Marc Erhardt^1,3

¹Institute of Biology/Molecular Microbiology, Humboldt-Universität zu Berlin, Berlin, 10115, Germany.

Journal of Biological Engineering

|April 8, 2024

Summary

Selecting the right fluorescent proteins (FPs) and using degradation tags are crucial for accurate bacterial research. This study compares 15 FPs in Salmonella, optimizing genetic reporters for reliable results.

Keywords:

Salmonella enterica Fluorescent proteins Genetic tools Microscopy Protein dynamics

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Last Updated: May 5, 2026

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Published on: May 28, 2012

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Area of Science:

Microbiology and Molecular Biology
Bacterial Genetics and Physiology
Fluorescence Microscopy and Imaging

Background:

Standardized genetic tools are essential for reproducible biological research.
Fluorescent proteins (FPs) are vital genetic reporters for in vivo studies but face challenges in application and protein dynamics.
Optimizing FP use is critical for understanding cellular processes in model organisms like Salmonella enterica.

Purpose of the Study:

To systematically compare the performance of 15 different fluorescent proteins (FPs) in vivo.
To evaluate the impact of protein degradation tags on FP dynamics and reporter systems.
To assess FP applicability for protein localization studies using advanced microscopy techniques.

Main Methods:

Comparative analysis of 15 FPs in Salmonella enterica, focusing on signal-to-background ratios and protein stability.
Evaluation of four protein degradation tags in both plasmid- and genome-based reporter systems.
Assessment of FP utility for protein localization via standard and super-resolution fluorescence microscopy.

Main Results:

Degradation tags are necessary for analyzing time-sensitive cellular processes, significantly improving reporter dynamics.
Degradation tags reduce cell-to-cell heterogeneity in genome-based reporters but increase it in plasmid-based systems.
FPs demonstrate applicability for protein localization studies in living bacterial cells.

Conclusions:

Careful selection of FPs and strategic use of degradation tags are vital for reliable fluorescence-based research.
This study provides a framework for developing improved genetic reporters for Gram-negative bacteria.
Findings enhance the reproducibility and consistency of experiments utilizing genetic reporters in microbial systems.