A novel RNA aptamer-modified riboswitch as chemical sensor

Area of Science:

• Analytical Chemistry
• Molecular Biology
• Biotechnology

Background:

• Biosensors are crucial for detecting various analytes.
• Existing biosensors often require labels or immobilization, limiting their application.
• Riboswitches offer a programmable platform for gene regulation.

Purpose of the Study:

• To develop a novel, label-free, and immobilization-free biosensor.
• To utilize RNA aptamer-modified riboswitches for controlling gene expression.
• To create a versatile platform for detecting various chemical targets.

Main Methods:

• Engineered a riboswitch-based biosensor with RNA aptamer-modified secondary-structural scaffolds.
• Controlled the ribosomal binding sequence (RBS) identity using aptamer-modified cis-repressor sequences.
• Utilized green fluorescent protein (GFP) as an indicator gene to report target presence and concentration.

Main Results:

• The developed biosensor demonstrated label- and immobilization-free operation.
• The sensor successfully detected the target molecule by controlling GFP expression.
• Quantitative detection of target concentrations was achieved by measuring GFP levels.

Conclusions:

• The novel RNA aptamer-modified riboswitch biosensor provides a sensitive and versatile detection platform.
• This strategy enables the construction of sensors for diverse chemicals by incorporating specific aptamers.
• The developed approach offers a new set of analytical tools for the field of analytical chemistry.