Construction and use of flow cytometry optimized plasmid-sensor strains.

Area of Science:

• Bacteriology
• Molecular Biology
• Biotechnology

Background:

• Assessing bacterial plasmid stability is crucial for genetic engineering and biotechnology.
• Traditional methods involving clone isolation and replica plating are time-consuming and lack sensitivity for high-stability plasmids.

Purpose of the Study:

• To develop a rapid, sensitive, and high-throughput method for determining bacterial plasmid stability.
• To leverage flow cytometry and a phenotypic marker for efficient detection of plasmid loss.

Main Methods:

• Utilized a green fluorescence protein (GFP) marker expressed in bacteria losing their plasmid.
• Employed flow cytometry for high-throughput single-cell analysis to discriminate between plasmid-free and plasmid-harboring cells.
• Compared the new method with traditional clone screening techniques.

Main Results:

• The flow cytometry-based method demonstrated high sensitivity in detecting plasmid instability.
• Significantly reduced the labor and time required compared to traditional screening methods.
• Provided robust statistical data due to high cell throughput.

Conclusions:

• This novel method offers a superior alternative for assessing bacterial plasmid stability.
• Enables precise quantification of plasmid loss, even at low frequencies.
• Facilitates advanced research in bacterial genetics and synthetic biology.