RNA-based Capture-SELEX for the selection of small molecule-binding aptamers

Area of Science:

• Biochemistry
• Molecular Biology
• Synthetic Biology

Background:

• RNA aptamers are valuable tools for molecular recognition.
• Selecting aptamers with high affinity and specificity for small molecules remains difficult.
• Aptamers exhibiting structure-switching properties are particularly rare.

Purpose of the Study:

• To present a protocol for the in vitro selection of small molecule-binding RNA aptamers using Capture-SELEX.
• To enable the development of synthetic riboswitches and biosensors.
• To compare Capture-SELEX with alternative in vitro selection methods.

Main Methods:

• Developed and detailed the Capture-SELEX protocol for aptamer selection.
• Focused on optimizing pool design for efficient selection.
• Provided a comparative analysis against existing aptamer selection techniques.

Main Results:

• Demonstrated the efficacy of Capture-SELEX for isolating aptamers with desired binding characteristics.
• Highlighted key considerations for pool design in aptamer selection.
• Offered practical insights into potential challenges and solutions.

Conclusions:

• Capture-SELEX is an effective method for selecting small molecule-binding RNA aptamers.
• The protocol facilitates the creation of aptamers for biosensor and synthetic riboswitch applications.
• This work provides valuable guidance for researchers in aptamer discovery.