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Updated: Oct 27, 2025
RNA Blot Analysis for the Detection and Quantification of Plant MicroRNAs
Published on: July 11, 2020
Detecting the Interaction of Double-stranded RNA Binding Protein, Viral Protein and Primary miRNA Transcript by
Lijia Zheng1, Chao Zhang1, Jianguo Wu1
1State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops, Vector-borne Virus Research Center, Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, China.
Abstract:
MicroRNAs (miRNAs) play important roles in plant growth, development, and response to infection by microbes. Double-stranded RNA binding protein 1 (DRB1) facilitates the processing of primary miRNA transcripts into mature miRNAs. Recently, we found that NS3 protein encoded by rice stripe virus (RSV) associates with DRB1 and promotes miRNA biogenesis during RSV infection ( Zheng et al., 2017 ). RNA co-immunoprecipitation (RIP) method was applied to identity association patterns among DRB1, NS3, and miRNA transcript.
Insights
Rice stripe virus NS3 protein interacts with DRB1, enhancing microRNA production. This interaction is crucial for plant antiviral defense during infection.
Area of Science:
- Plant molecular biology
- Virology
- Biochemistry
Background:
- MicroRNAs (miRNAs) are key regulators of plant growth, development, and stress responses.
- Double-stranded RNA binding protein 1 (DRB1) is essential for processing primary miRNA transcripts into mature miRNAs.
- Plant viruses can manipulate host factors to facilitate their replication and spread.
Purpose of the Study:
- To investigate the interaction between the rice stripe virus (RSV) NS3 protein and DRB1.
- To determine the effect of the NS3-DRB1 interaction on miRNA biogenesis during RSV infection.
- To elucidate the molecular mechanisms underlying viral manipulation of host miRNA pathways.
Main Methods:
- RNA co-immunoprecipitation (RIP) assays were employed to identify association patterns.
- Analysis of DRB1, NS3 protein, and miRNA transcript interactions.
- Quantitative assessment of miRNA levels in infected and uninfected plants.
Main Results:
- The NS3 protein of RSV was found to associate with DRB1.
- This association promotes the biogenesis of specific miRNAs during RSV infection.
- The interaction between NS3 and DRB1 enhances the processing of miRNA precursors.
Conclusions:
- The RSV NS3 protein hijacks the host factor DRB1 to boost miRNA production.
- This viral strategy likely contributes to modulating host gene expression for viral advantage.
- Understanding this interaction provides insights into plant-virus interplay and antiviral mechanisms.
