An improved SNAP-ADAR tool enables efficient RNA base editing to interfere with post-translational protein...

Area of Science:

• Molecular Biology
• Genetic Engineering
• Biochemistry

Background:

• RNA base editing corrects disease mutations by altering adenosine to inosine in RNA.
• Post-translational modifications (PTMs) like phosphorylation and acetylation regulate protein function.
• Targeting PTMs offers a novel strategy for modulating cellular signaling.

Purpose of the Study:

• To explore RNA base editing for removing PTM sites on signaling proteins.
• To demonstrate the feasibility and efficiency of this approach across diverse targets.
• To establish RNA base editing as a tool for rapid, reversible control of protein function.

Main Methods:

• Application of an improved SNAP-ADAR tool for high-efficiency RNA editing.
• Systematic targeting of over 70 PTM sites in various signaling proteins.
• Analysis of editing efficiency and downstream functional effects, including JAK/STAT pathway modulation.

Main Results:

• Demonstrated successful removal of PTM sites at over 70 locations in signaling proteins.
• Identified key factors influencing editing efficiency and functional outcomes.
• Showcased both negative and positive regulation of the JAK/STAT pathway via PTM removal.
• Achieved broad codon scope editing with the enhanced SNAP-ADAR tool.

Conclusions:

• RNA base editing is a versatile tool for perturbing protein function by removing PTMs.
• This method offers advantages in speed, dose-dependency, and reversibility compared to DNA editing.
• PTM interference via RNA base editing presents a promising new application in molecular biology and therapeutics.