Sequence-Specific Installation of Aryl Groups in RNA via DNA-Catalyst Conjugates

Area of Science:

• Biochemistry
• Molecular Biology
• Chemical Biology

Background:

• Site-specific RNA modification is crucial for labeling, functional studies, and therapeutics.
• Existing methods for RNA modification face challenges in efficiency and specificity.

Purpose of the Study:

• To develop a novel sequence-directed catalytic strategy for site-specific RNA modification.
• To enable efficient arylation of RNA 2'-OH groups using DNA oligonucleotides.

Main Methods:

• Utilized DNA oligonucleotides with a catalytic amine group for S_NAr arylation.
• Employed chloro-pyrimidine electrophiles that react with amino-DNA conjugates.
• Demonstrated sequence-specific delivery of aryl groups to RNA targets.

Main Results:

• Achieved high yields of RNA arylation at sequence-complementary sites.
• Successfully fluorescently labeled messenger RNA (mRNA) at the polyA tail using an azide-functionalized electrophile.
• Demonstrated selective knockdown of protein expression by targeting specific mRNA coding regions.

Conclusions:

• The developed strategy provides a versatile platform for RNA labeling and modification.
• This sequence-directed catalytic approach has significant potential in molecular biology research and therapeutic development.