Programming bacteria for multiplexed DNA detection.

Area of Science:

• Synthetic Biology
• Microbiology
• Biosensing

Background:

• DNA serves as a universal signal for living organisms.
• Developing efficient and specific DNA detection methods is crucial for various applications.

Purpose of the Study:

• To engineer Bacillus subtilis as a cell-based DNA sensor.
• To detect specific DNA sequences in environmental samples.
• To enable multiplexed and DNA-extraction-free species detection.

Main Methods:

• Engineering naturally competent Bacillus subtilis for DNA sensing.
• Utilizing orthogonal fluorescent reporters for multiplexed detection.
• Testing sensor specificity against diverse bacterial species and complex samples.

Main Results:

• Developed Bacillus subtilis strains capable of detecting specific DNA sequences.
• Achieved high specificity in identifying bacterial species, including human pathogens.
• Demonstrated multiplexed detection and detection without prior DNA extraction.
• Showcased the modularity and programmability of the DNA-sensing system.

Conclusions:

• Cell-based DNA sensors using Bacillus subtilis offer a novel approach for detecting specific DNA sequences.
• The developed system allows for specific, multiplexed, and DNA-extraction-free detection of species.
• The modularity and simplicity of the system support diverse applications in programmable DNA sensing.