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11:52
Analysis of LINE-1 Retrotransposition at the Single Nucleus Level
Published on: April 23, 2016
Retrotransposons: mobile and mutagenic from conception to death.
1Division of Genetics and Genomics, The Roslin Institute and Royal (Dick) School of Veterinary Studies, University of Edinburgh, Easter Bush, UK. geoff.faulkner@roslin.ed.ac.uk
FEBS Letters
|April 12, 2011
Summary
Active retrotransposons like L1, Alu, and SVA contribute to human genome evolution and variation. New screening methods reveal their role in disease and somatic mosaicism in developing humans.
Area of Science:
- Genomics
- Molecular Biology
- Evolutionary Biology
Background:
- Mobile genetic elements, particularly retrotransposons, significantly influence mammalian genome evolution.
- Active retrotransposon families such as LINE-1 (L1), Alu, and Short Interspersed Nuclear Element (SINE)-Variable Number of Tandem Repeats (VNTR) and Alu (SVA) are present and active in the human germ line.
- Retrotransposition events contribute to pathogenic conditions and structural variations within the human genome across diverse populations.
Purpose of the Study:
- To highlight the significant role of mobile genetic elements in mammalian genome evolution.
- To underscore the ongoing activity of specific retrotransposon families in the human germ line.
- To present evidence for an expanded role of retrotransposition in human biology, including somatic mobilization.
Main Methods:
- Development of high-throughput screening approaches for detecting retrotransposon insertion polymorphisms.
- Utilizing genome-scale technologies to analyze retrotransposon activity.
- Investigating retrotransposition in germ line, embryonic, and neural cells.
Main Results:
- High-throughput screening methods effectively detect retrotransposon insertion polymorphisms.
- Evidence confirms that retrotransposon families (L1, Alu, SVA) remain transposition-competent in the human germ line.
- Somatic retrotransposition occurs in the developing embryo and in neural cells, indicating a broader biological role.
Conclusions:
- Mobile genetic elements are key drivers of mammalian genome evolution.
- Active retrotransposons in the human germ line contribute to genetic diversity and disease.
- Retrotransposition plays an increasingly recognized role in human biology, extending to somatic cells during development.
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