Specific Light-Up System for Protein and Metabolite Targets Triggered by Initiation Complex Formation

Area of Science:

• Biochemistry
• Molecular Biology
• Analytical Chemistry

Background:

• Gene regulation systems inspire molecular detection methods.
• Quantitative detection of non-nucleic acid targets like proteins and metabolites is crucial.
• Existing methods may lack simplicity or real-time capabilities.

Purpose of the Study:

• To develop a one-tube, one-step real-time quantitative detection methodology.
• To enable isothermal signal amplification for non-nucleic acid targets.
• To demonstrate the system's utility with protein and metabolite examples.

Main Methods:

• A novel isothermal signal amplification strategy was employed.
• The system integrates detection and amplification in a single tube.
• Real-time quantitative detection was performed using thrombin (protein) and streptomycin (metabolite) as model targets.

Main Results:

• Successful real-time quantitative detection of thrombin and streptomycin was achieved.
• Detection limits were as low as 50 pM for thrombin and 75 nM for streptomycin.
• The method exhibited a dynamic range spanning over four orders of magnitude for target concentrations.

Conclusions:

• The developed method offers a sensitive and efficient approach for detecting non-nucleic acid targets.
• Its one-tube, one-step format and isothermal nature facilitate point-of-care or on-site testing.
• Potential applications include medical diagnostics, food safety, and environmental monitoring.