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Related Experiment Videos

Mobile elements: drivers of genome evolution.

Haig H Kazazian1

  • 1Department of Genetics, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA. kazazian@mail.med.upenn.edu

Science (New York, N.Y.)
|March 16, 2004
PubMed
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Mobile elements, particularly retrotransposons, significantly impact genome evolution in plants and mammals. These mobile genetic elements, despite host control, have expanded and are now valuable tools for studying genome evolution and gene function.

Area of Science:

  • Genomics
  • Molecular Biology
  • Evolutionary Biology

Background:

  • Mobile genetic elements, especially retrotransposons, play a crucial role in shaping genomes.
  • In plants and mammals, retrotransposons comprise a substantial portion of the genome.
  • Host organisms possess mechanisms to regulate mobile element proliferation.

Purpose of the Study:

  • To explore the impact of mobile elements on genome evolution.
  • To understand the role of retrotransposons in shaping genes and overall genome structure.
  • To highlight the emerging utility of mobile elements as research tools.

Main Methods:

  • Genomic analysis of mobile element distribution and accumulation.
  • Comparative genomics across different plant and mammal species.

Related Experiment Videos

  • Functional studies investigating gene and genome modulation by mobile elements.

    • Main Results:

    • Retrotransposons have accumulated significantly, constituting a large fraction of plant and mammal genomes.
    • Massive expansions of retrotransposons have been evolutionarily tolerated.
    • Mobile elements have demonstrably shaped both individual genes and entire genomes.

    Conclusions:

    • Mobile elements are major drivers of genome evolution.
    • Retrotransposon accumulation, despite host regulation, has profoundly influenced genome architecture.
    • Mobile elements are increasingly recognized as powerful tools for advancing our understanding of genome evolution and gene function.