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Do Ty3/Gypsy Transposable Elements Play Preferential Roles in Sex Chromosome Differentiation?
Kornsorn Srikulnath1,2,3,4,5,6, Syed Farhan Ahmad1,3,4, Worapong Singchat1,3
1Animal Genomics and Bioresource Research Unit (AGB Research Unit), Faculty of Science, Kasetsart University, 50 Ngamwongwan, Chatuchak, Bangkok 10900, Thailand.
Life (Basel, Switzerland)
|April 23, 2022
Summary
Transposable elements (TEs) significantly impact eukaryotic genomes, especially sex chromosomes. This review explores how TEs drive sex chromosome evolution and differentiation through genomic rearrangements and altered gene regulation.
Area of Science:
- Genomics
- Evolutionary Biology
- Molecular Biology
Background:
- Transposable elements (TEs) are mobile genetic sequences comprising a significant fraction of eukaryotic genomes.
- TEs contribute to genomic novelty through chromosomal rearrangements and gene regulation.
- Recent research indicates a high abundance of TEs within sex chromosomes across various lineages.
Purpose of the Study:
- To propose evolutionary links between specific transposable elements (TEs), like Ty3/Gypsy, and sex chromosome differentiation.
- To investigate the role of TEs in shaping sex-determining regions and driving sex chromosome evolution.
- To explore the origins of TE accumulation in sex-determining regions and its implications.
Main Methods:
- Review of existing literature on transposable elements and sex chromosome evolution.
- Hypothesis-driven analysis of the proposed relationships between TEs and sex chromosome differentiation.
- Discussion of recent methodologies for identifying TEs and their functional roles in sex chromosome dynamics.
Main Results:
- TEs, particularly Ty3/Gypsy, are hypothesized to contribute to sex chromosome differentiation across lineages.
- TEs can influence sex-determining region dynamics by suppressing recombination, affecting chromosome structure and evolution.
- TE accumulation in sex-determining regions, originating from previously TE-poor areas, suggests a link to their emergence.
Conclusions:
- Transposable elements play a crucial role in the structural evolution and differentiation of sex chromosomes.
- TEs can drive the formation and maintenance of sex-determining regions through mechanisms like recombination suppression.
- Understanding TE dynamics is essential for comprehending sex chromosome evolution and potential chromosome degeneration.
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