Related Experiment Video
Updated: Mar 21, 2026
04:04
Real-Time Quantification of the Effects of IS200/IS605 Family-Associated TnpB on Transposon Activity
Published on: January 20, 2023
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Introns as Protective Buffers Against Transposable Elements Invasion During Genome Gigantism in a Newt
Kazuto Bou1,2, Kiyokazu Agata1,2
1Laboratory of Regeneration Biology, National Institute for Basic Biology, Okazaki, Japan.
Genes to Cells : Devoted to Molecular & Cellular Mechanisms
|March 20, 2026
Summary
Genome gigantism in newts is driven by transposable element (TE) bursts, leading to gene expansion or decay. Introns may buffer against TE invasion, delaying gene loss until relaxed selection.
Area of Science:
- Evolutionary Biology
- Genomics
- Molecular Biology
Background:
- Genome size variation is linked to transposable element (TE) activity.
- The impact of TE bursts on gene architecture evolution is not well understood.
Purpose of the Study:
- To investigate the role of TE bursts in the expansion and reshaping of newt genomes.
- To compare genome architecture changes in Pleurodeles waltl with Xenopus tropicalis.
Main Methods:
- Comparative genomics of two Pleurodeles waltl assemblies and Xenopus tropicalis.
- Analysis of multicopy genes and intronic TE insertions.
- Identification of TE-derived loci.
Main Results:
- Evidence for past and ongoing TE bursts in Pleurodeles waltl, contributing to genome gigantism.
- TE invasions lead to diverse gene outcomes: functional gene expansion via splicing or gene decay.
- Introns act as buffers against TE invasion, delaying gene pseudogenization.
Conclusions:
- Genome gigantism is a dynamic process shaped by punctuated TE activity.
- Intronic TE invasion influences gene evolution and genome architecture.
- The Bou1 locus highlights TE-derived elements in germline biology.
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