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Updated: Jul 21, 2025
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An Efficient Strategy for Generating Tissue-specific Binary Transcription Systems in Drosophila by Genome Editing
Published on: September 19, 2018
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Transcriptional Readthrough Interrupts Boundary Function in Drosophila
Olga Kyrchanova1,2, Vladimir Sokolov1, Maxim Tikhonov2
1Department of the Control of Genetic Processes, Institute of Gene Biology Russian Academy of Sciences, 34/5 Vavilov St., Moscow 119334, Russia.
International Journal of Molecular Sciences
|July 29, 2023
Summary
Readthrough transcription (RT) can disrupt chromatin boundary function, impacting gene regulation. This study investigated how RT affects boundary activity in the Drosophila bithorax complex, revealing a potential widespread mechanism for controlling gene expression.
Area of Science:
- * Molecular Biology
- * Genetics
- * Epigenetics
Background:
- * Chromatin insulators/boundaries are crucial for organizing enhancer-promoter interactions in higher eukaryotes.
- * Mechanisms regulating boundary function remain largely unknown.
- * The Drosophila bithorax complex (BX-C) serves as a model for studying boundary function.
Purpose of the Study:
- * To investigate whether readthrough transcription (RT) impacts chromatin boundary function.
- * To explore a potential mechanism for regulating boundary activity and gene expression.
Main Methods:
- * Utilized Drosophila BX-C boundary replacement platforms (Fab-7 and F2).
- * Deleted and replaced native boundaries with an attP site.
- * Introduced boundary elements, promoters, and polyadenylation signals in various combinations to assay boundary function.
Main Results:
- * Demonstrated that readthrough transcription can interfere with boundary activity.
- * Showed that RT can alter the function of the Fab-7 and F2 boundaries in the BX-C.
Conclusions:
- * Readthrough transcription is a potential mechanism for regulating chromatin boundary function.
- * RT may be a widely used strategy to modulate gene expression in multicellular eukaryotes, given the prevalence of long non-coding RNAs (lncRNAs).
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