Related Experiment Video
Updated: May 18, 2026
09:45
An Oligonucleotide-based Tandem RNA Isolation Procedure to Recover Eukaryotic mRNA-Protein Complexes
Published on: August 18, 2018
Quantifying RNA-protein interactions in situ using modified-MTRIPs and proximity ligation
Jeenah Jung1, Aaron W Lifland, Chiara Zurla
1Wallace H Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, 313 Ferst Drive, UA Whitaker Bldg, Atlanta, GA 30332, USA.
Nucleic Acids Research
|September 7, 2012
Summary
Researchers developed a new method to visualize RNA-protein interactions within single cells. This technique precisely quantifies these interactions, offering insights into RNA regulation and viral processes.
Area of Science:
- Molecular Biology
- Cell Biology
- Virology
Background:
- RNA metabolism is tightly regulated by trans-acting factors, including microRNAs and RNA-binding proteins (RBPs).
- Understanding the spatial and quantitative dynamics of RNA-protein interactions is crucial for elucidating RNA regulation.
- Existing methods lack the sensitivity to detect and quantify these interactions in situ within single cells and across populations.
Purpose of the Study:
- To develop and validate a novel in situ method for visualizing and quantifying RNA-protein interactions.
- To investigate the localization and frequency of interactions between viral RNA and proteins.
- To examine the impact of drug treatment and protein expression levels on specific RNA-protein interactions.
Main Methods:
- Development of a proximity ligation assay (PLA) combined with peptide-modified, multiply-labelled tetravalent RNA imaging probes (MTRIPs).
- MTRIPs were designed to target sequences near RBP binding sites.
- Utilized proximity ligation and rolling circle amplification (RCA) for signal amplification and detection.
Main Results:
- Successfully detected and quantified, with single-interaction sensitivity, the localization and frequency of interactions between human respiratory syncytial virus (hRSV) nucleocapsid protein (N) and viral genomic RNA (gRNA).
- Demonstrated the method's ability to analyze interactions under varying conditions, such as drug treatment (actinomycin D) and altered protein expression levels.
- Characterized the effects of actinomycin D on HuR interactions with β-actin mRNA and poly(A)+ mRNA.
Conclusions:
- The developed PLA-based method provides a sensitive and quantitative approach for studying RNA-protein interactions in situ.
- This technique enables the analysis of RNA-protein dynamics at the single-cell level and across cell populations.
- The findings offer new insights into viral RNA management and the regulation of host gene expression by RBPs.
