Localized 2'-OH Acylation at Poly(A) Extends RNA Translation.

Area of Science:

• Biochemistry
• Molecular Biology
• RNA Therapeutics

Background:

• Coding RNAs have limited intracellular stability, hindering their therapeutic potential.
• Post-transcriptional RNA modifications offer a strategy to modulate RNA function and stability.

Purpose of the Study:

• To investigate the impact of localized 2'-OH acylation on RNA protein expression over time.
• To determine the effectiveness of different chemical adducts and modification sites on RNA translation duration.

Main Methods:

• Localized 2'-OH acylation of Green Fluorescent Protein (GFP) RNA at the protein-coding region and poly(A) tail.
• Utilized aryl amino acid derivatives and alkyl variants for RNA acylation.
• Quantified protein expression levels over a 36-hour period.
• Performed preliminary mechanistic studies to understand the modification's effects.

Main Results:

• Acylation in the protein-coding region suppressed protein expression.
• Acylation at the poly(A) tail significantly extended translation duration.
• Protein output increased up to 8-fold at 36 hours with poly(A) tail acylation.
• Aryl amino acid derivatives were more effective than alkyl variants.

Conclusions:

• Localized post-transcriptional 2'-acylation of the poly(A) tail enhances RNA protein expression capabilities.
• This modification strategy can overcome the limitation of short intracellular RNA lifetime.
• The mechanism may involve disruption of the poly(A) helical structure.