Efficient Isolation of Bacterial RNAs Using Silica-Based Materials Modified with Ionic Liquids

Area of Science:

• Materials Science
• Biochemistry
• Separation Science

Background:

• High-quality nucleic acids are crucial for molecular diagnostics and biopharmaceuticals.
• Current nucleic acid purification methods are laborious, time-consuming, and use hazardous chemicals.
• There is a need for sustainable and cost-effective nucleic acid purification technologies.

Purpose of the Study:

• To prepare and evaluate silica-based materials chemically modified with chloride-based ionic liquids (supported ionic liquids, SILs).
• To assess the potential of these SILs for effective RNA isolation.
• To investigate the purification of transfer RNA (tRNA) from bacterial lysates.

Main Methods:

• Synthesis and characterization of four chloride-based SILs (1-methyl-3-propylimidazolium, triethylpropylammonium, dimethylbutylpropylammonium, and trioctylpropylammonium) using NMR, SEM, elemental analysis, and zeta potential measurements.
• Evaluation of SILs as chromatographic supports for recombinant RNA isolation.
• Investigation of tRNA adsorption kinetics and binding capacities on modified silica materials.
• Purification of tRNA from *Escherichia coli* lysates using SILs.

Main Results:

• Successful covalent attachment of IL cations to silica supports was confirmed without significant morphological changes.
• Maximum tRNA binding capacities of approximately 16 µmol/g were achieved with silica modified by 1-methyl-3-propylimidazolium chloride and dimethylbutylpropylammonium chloride.
• Adsorption data followed a pseudo-first-order kinetic model.
• SILs comprising 1-methyl-3-propylimidazolium chloride and dimethylbutylpropylammonium chloride demonstrated the best performance in purifying tRNA from bacterial lysates.

Conclusions:

• Silica-based materials modified with specific chloride-based ionic liquids (SILs) provide an efficient, sustainable, and cost-effective technology for bacterial RNA purification.
• These SILs show potential for purifying various biomolecules and nucleic acids from different sources.
• The developed materials offer a promising alternative to traditional hazardous methods for nucleic acid purification.