Systematic identification of variant-specific RNA structure-small molecule interactions exemplified by RNA...

Area of Science:

• Molecular Biology
• Pharmacology
• Genetics

Background:

• Genetic variations, like cancer mutations, can alter RNA structures.
• These alterations may affect how RNA-targeting small molecules bind.
• Current methods cannot identify these specific variant-RNA interactions.

Purpose of the Study:

• To develop a high-throughput method for detecting variant-specific RNA-small molecule interactions.
• To investigate how genetic variations influence RNA-small molecule binding.
• To explore the potential of these interactions in RNA-targeting drug development.

Main Methods:

• Developed Binding- and Vinyl-Quinazolinone-Induced Deletion-Based Mutational Profiling (BIVID-MaP).
• Combines binding-dependent covalent modification with deletion profiling.
• Utilizes deep sequencing for high-throughput analysis.

Main Results:

• Identified numerous variant-specific interactions between a G-quadruplex (G4)-binding molecule and RNAs with single-nucleotide variants.
• Demonstrated that cancer-associated somatic mutations significantly alter small molecule binding intensity by affecting G4 structures.
• Revealed previously overlooked variant-specific interactions influenced by single-nucleotide mutations.

Conclusions:

• BIVID-MaP is a powerful tool for studying variant-specific RNA-small molecule interactions.
• Understanding these interactions is crucial for developing targeted RNA-based therapies.
• This approach may advance the design of novel RNA-targeting drugs.