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Updated: Jun 16, 2025
10:19
Screening and Identification of RNA Silencing Suppressors from Secreted Effectors of Plant Pathogens
Published on: February 3, 2020
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Small DNA elements can act as both insulators and silencers in plants
Tobias Jores1,2,3, Nicholas A Mueth1, Jackson Tonnies1,4
1Department of Genome Sciences, University of Washington, Seattle, WA 98195, USA.
The Plant Cell
|June 9, 2025
Summary
Plant insulators and silencers, crucial for gene regulation, were identified using Plant STARR-seq. These elements can block enhancers or repress transcription, offering valuable tools for plant biotechnology.
Area of Science:
- Plant molecular biology
- Epigenetics
- Gene regulation
Background:
- Insulators and silencers are cis-regulatory elements controlling gene transcription.
- These elements are poorly understood in plants.
- Understanding these elements is key for plant biotechnology.
Purpose of the Study:
- To identify and characterize plant insulators and silencers.
- To explore the dual function of these elements in gene regulation.
- To provide building blocks for plant genetic engineering.
Main Methods:
- Utilized Plant STARR-seq, a massively parallel reporter assay.
- Tested short fragments from eight large plant insulators.
- Validated findings in transgenic Arabidopsis thaliana, maize, and rice.
Main Results:
- Identified over 100 DNA fragments that block enhancer activity.
- Demonstrated that fragments can function as potent insulators when combined.
- Observed that these fragments act as silencers when placed near weak enhancers.
Conclusions:
- Plant cis-regulatory elements can function as either insulators or silencers based on context.
- Identified functional DNA elements for potential use in plant biotechnology.
- Findings advance the understanding of gene regulation in plants.
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