Biophysical Properties of Bifunctional Phage-Biosensor

Area of Science:

• Biomedical Engineering
• Biosensor Technology
• Molecular Diagnostics

Background:

• Biosensor research is rapidly advancing, demanding precise analytical devices for various applications.
• Existing methods require improvement in sensitivity and specificity for complex biomedical targets.
• Phage display technology offers a unique platform for developing novel biosensing tools.

Purpose of the Study:

• To develop a sensitive and specific phage-based biosensor for biomedical detection.
• To utilize phage liquid crystal properties for quantitative analyte measurement.
• To establish a novel detection system using optical and luminescence-based readouts.

Main Methods:

• In vitro selection of phages targeting specific analytes.
• Integration of a reporter dye (Brilliant Green) and a lanthanide label for optical and luminescence signaling.
• Utilizing the phage's liquid crystal properties for concentration-dependent signal generation.

Main Results:

• The developed phage-based biosensor demonstrated concentration-dependent quantitative measurement of green fluorescent protein (GFP).
• A limit of detection of 0.24 µg/mL for GFP was achieved.
• The reporter dye effectively modulated both color intensity and time-resolved luminescence signals.

Conclusions:

• The bifunctional phage biosensor successfully enabled quantitative detection of GFP.
• This novel method highlights the potential of phage liquid crystals in biosensing.
• The approach offers a promising foundation for developing highly sensitive and specific biosensors for diverse targets.