Absolute Quantification of Noncoding RNA by Microscale Thermophoresis.

Area of Science:

• Molecular Biology
• Biochemistry
• Genomics

Background:

• Accurate quantification of noncoding RNA copy numbers is critical for understanding RNA modification research and tissue differentiation.
• Existing quantification methods may exhibit biases, particularly concerning modified RNA species.

Purpose of the Study:

• To develop a rapid and precise method for quantifying noncoding RNA copy numbers.
• To investigate the impact of tRNA toxins, heat stress, and RNA modifications on single tRNA species.
• To compare the developed method with existing RNA-sequencing approaches.

Main Methods:

• Development of a hybridization-based approach utilizing microscale thermophoresis (MST) for RNA quantification.
• Application of MST for analyzing the effects of various stressors and modifications on single tRNA species.
• Comparative analysis of MST-based quantification against RNA-sequencing (RNA-Seq).

Main Results:

• The developed MST method provides quantification of single tRNA species within approximately one hour.
• MST effectively quantifies the impact of tRNA toxins, heat stress, and RNA modifications.
• Significant differences were observed between MST and RNA-Seq, suggesting potential RNA modification-induced bias in RNA-Seq.

Conclusions:

• Microscale thermophoresis offers a fast and highly precise alternative for noncoding RNA quantification.
• The findings highlight potential limitations of RNA-Seq in quantifying modified RNA species.
• The MST approach is applicable to quantifying various RNA types, including rRNA and polyA levels.