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Functional allelic diversity of PTGS components revealed by a high-throughput RUBY-based screening
Xin Wei1,2, Yanming Hou2, Yuyang Si2
1Northeast Forestry University, Northeast Asia Biodiversity Research Center, Harbin, 150040, China.
The Plant Journal : for Cell and Molecular Biology
|July 16, 2026
Summary
This study identifies new mutations in genes controlling post-transcriptional gene silencing (PTGS). These findings offer valuable genetic tools for understanding PTGS mechanisms and improving gene expression control.
Area of Science:
- Molecular Biology
- Genetics
- Plant Science
Background:
- Post-transcriptional gene silencing (PTGS) regulates gene expression via small RNAs, impacting transgene and endogenous gene expression.
- Limited characterized mutations in PTGS components hinder mechanistic understanding and domain function studies.
Purpose of the Study:
- To identify novel mutations in PTGS components using a high-throughput screening approach.
- To investigate the functional roles of specific protein domains within PTGS factors.
Main Methods:
- Combined the ein5-1 RNA decay mutant with the RUBY reporter system for high-throughput screening.
- Identified 239 mutations across key PTGS components and novel factors.
- Performed systematic phenotypic evaluation of identified mutants.
Main Results:
- Discovered mutations affecting critical protein domains in PTGS components.
- Observed spatial-temporal repression of PTGS in various mutants.
- Found that mutations in catalytic sites, RNA-binding sites, or interaction interfaces reduced siRNA production.
Conclusions:
- Generated valuable mutant alleles for studying domain-specific functions of PTGS factors.
- These resources aid in understanding PTGS mechanisms and offer strategies for fine-tuning gene silencing efficiency.
