Using nucleolytic toxins as restriction enzymes enables new RNA applications

Area of Science:

• Biotechnology
• Molecular Biology
• RNA Therapeutics

Background:

• DNA restriction enzymes have been pivotal in biotechnology for decades.
• The growing field of RNA and mRNA therapeutics necessitates sequence-specific RNA endoribonucleases.

Purpose of the Study:

• To introduce EcoToxN1, a novel sequence-specific RNA endoribonuclease.
• To explore its utility in RNA and mRNA analysis and biomanufacturing.

Main Methods:

• Characterization of EcoToxN1, a type III toxin-antitoxin family member.
• Assessing its RNA cleavage activity on single-stranded RNA based on a specific pentamer recognition site.

Main Results:

• EcoToxN1 functions as a sequence-specific RNA endoribonuclease, cleaving RNA within a recognized pentamer sequence.
• The enzyme operates independently of guide RNA/DNA oligos and magnesium, across a broad temperature range.
• EcoToxN1 exhibits characteristics of an RNA restriction enzyme.

Conclusions:

• EcoToxN1 represents a significant advancement for RNA analysis and biomanufacturing.
• It facilitates novel workflows, addressing the need for efficient, cost-effective, and reliable methods in RNA-based technologies.