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Related Experiment Videos

Perspective: transposable elements, parasitic DNA, and genome evolution.

M G Kidwell1, D R Lisch

  • 1Department of Ecology and Evolutionary Biology, The University of Arizona, Tucson 85721, USA. kidwell@azstarnet.com

Evolution; International Journal of Organic Evolution
|March 27, 2001
PubMed
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Mobile genetic elements, or transposable elements, play a complex role in genome evolution, ranging from parasitic to mutualistic interactions. These elements act as endogenous mutators, influencing host evolution through various mechanisms.

Area of Science:

  • Genomics
  • Evolutionary Biology
  • Molecular Biology

Background:

  • Mobile genetic elements, including transposable elements, have been historically mischaracterized as "selfish DNA" or "junk DNA."
  • Recent biological advancements necessitate a re-evaluation of the transposable element-host genome relationship.

Purpose of the Study:

  • To reassess the role of mobile elements in host genome evolution.
  • To challenge simplistic and potentially inaccurate labels for transposable elements.
  • To explore the spectrum of interactions between transposable elements and host genomes.

Main Methods:

  • Review and synthesis of recent developments across various biological disciplines.
  • Analysis of the evolutionary dynamics of transposable elements within host genomes.

Related Experiment Videos

  • Examination of selection pressures acting on transposable elements at multiple biological levels.

    • Main Results:

    • Transposable elements are potent, endogenous mutators with broad-spectrum effects.
    • The relationship between transposable elements and hosts exists on a continuum from parasitism to mutualism.
    • Transposable element traits can initially evolve neutrally before being co-opted for new host functions.

    Conclusions:

    • Outdated terminology like "selfish DNA" and "junk DNA" is misleading.
    • A nuanced understanding of transposable elements reveals their significant, multifaceted impact on genome evolution.
    • Transposable elements are key drivers of evolutionary innovation through host gene co-option.