RNA self-splicing by engineered hairpin ribozyme variants.

Area of Science:

• Molecular Biology
• RNA Biology
• Biochemistry

Background:

• Small RNAs with self-cleavage and ligation capabilities may represent early precursors to complex self-splicing introns.
• The RNA world hypothesis suggests RNA molecules played central roles in early life, including catalytic functions.

Purpose of the Study:

• To engineer and demonstrate the self-splicing activity of hairpin ribozyme variants acting as introns.
• To investigate the mechanisms of intron removal and exon ligation mediated by these engineered ribozymes.

Main Methods:

• Design of hairpin ribozyme variants, including manual and computer-aided approaches.
• Experimental validation of self-splicing activity, involving cleavage at intron-exon junctions and subsequent exon ligation.

Main Results:

• Both manually designed and computer-aided hairpin ribozyme variants successfully performed self-splicing.
• The ribozymes were efficiently removed from the parent RNA, releasing a cut-out intron and ligated exon fragments.

Conclusions:

• Engineered hairpin ribozymes can function as self-splicing introns, excising themselves from RNA transcripts.
• This study provides experimental evidence supporting the potential role of such self-splicing RNAs in the evolution of introns and RNA processing mechanisms.