Biosensing Vibrio cholerae with Genetically Engineered Escherichia coli.

Area of Science:

• Synthetic Biology
• Microbiology
• Genetic Engineering

Background:

• Cholera, a severe diarrheal disease caused by Vibrio cholerae, poses a significant global health threat.
• Current cholera treatments have limitations, necessitating novel therapeutic and preventative strategies.
• The development of microbes capable of sensing and eliminating V. cholerae is a promising area for alternative interventions.

Purpose of the Study:

• To design and construct a synthetic genetic sensing system for detecting Vibrio cholerae.
• To utilize nonpathogenic Escherichia coli as a host for the engineered biosensor.
• To create a sensitive and controllable system for identifying V. cholerae presence.

Main Methods:

• Engineered a synthetic sensing system in Escherichia coli (E. coli).
• Transferred Vibrio cholerae quorum sensing proteins into E. coli.
• Integrated a CRISPR interference (CRISPRi) based genetic inverter.
• Utilized computational modeling to simulate and refine the system's in vivo behavior.

Main Results:

• The synthetic sensor demonstrated high sensitivity in detecting V. cholerae supernatant.
• The system exhibited tight control over the expression of the output Green Fluorescent Protein (GFP).
• Computer simulations aided in optimizing the design for effective in vivo function.

Conclusions:

• A novel synthetic genetic sensing system for V. cholerae detection was successfully developed.
• The engineered E. coli biosensor shows potential as a tool for cholera prevention and treatment.
• This work lays the foundation for developing targeted microbial therapies against V. cholerae.