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Updated: Mar 1, 2026
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Somatizing the transposons action
Elgion L S Loreto1, Camila Moura Pereira2
1Department of Biochemistry and Molecular Biology, University of Santa Maria, Santa Maria, RS, Brazil.
Mobile Genetic Elements
|June 6, 2017
Summary
Somatic mobilization of transposable elements (TEs) is more frequent than expected. Its biological impact depends on genome landscape, TE control mechanisms, and organismal germline-soma separation, influencing plasticity, disease, aging, or genetic variability.
Area of Science:
- Genetics
- Molecular Biology
- Evolutionary Biology
Background:
- Transposable elements (TEs) are mobile genetic sequences within genomes.
- Somatic mobilization of TEs, or transposition in non-germline cells, is increasingly recognized as a significant biological phenomenon.
- The extent and consequences of somatic TE mobilization are influenced by genomic context and regulatory mechanisms.
Purpose of the Study:
- To review the prevalence and biological significance of somatic transposable element mobilization.
- To explore the factors influencing the intensity and consequences of somatic transposition.
- To examine how germline-soma separation affects the role of somatic mobilization in different organisms.
Main Methods:
- Literature review of studies on transposable element dynamics in somatic cells.
- Analysis of genomic and epigenomic factors influencing TE activity.
- Comparative analysis across different organisms with varying germline-soma separation.
Main Results:
- Somatic mobilization of TEs is more common than previously assumed.
- The impact of somatic transposition is contingent upon the specific transposable element landscape of a genome and the "momentum" of individual TEs.
- Biological consequences, including phenotypic plasticity, disease, aging, and genetic variability, differ based on the organism's germline-soma separation.
- In organisms with distinct germline and somatic lineages, somatic transposition can contribute to aging and disease.
- In organisms lacking this separation, somatic mobilization serves as a source of genetic variation.
Conclusions:
- Somatic transposable element mobilization is a widespread phenomenon with diverse biological outcomes.
- Understanding TE landscapes and regulatory control is crucial for predicting the consequences of somatic transposition.
- The evolutionary and biological roles of somatic TE mobilization are shaped by the fundamental organization of an organism's reproductive and somatic lineages.
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