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Related Experiment Videos

Mammalian retroelements.

Prescott L Deininger1, Mark A Batzer

  • 1Tulane Cancer Center, Department of Environmental Health Sciences, Tulane University Health Sciences Center, New Orleans, Louisiana 70112, USA. pdeinin@tulane.edu

Genome Research
|October 9, 2002
PubMed
Summary
This summary is machine-generated.

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Mobile elements, termed retroelements, have amplified in eukaryotic genomes, creating significant

Area of Science:

  • Genomics
  • Molecular Biology
  • Evolutionary Biology

Background:

  • Eukaryotic genomes are largely composed of mobile genetic elements, often referred to as 'junk' DNA.
  • Retroelements, which use an RNA intermediate, are a major component of this non-coding DNA.
  • These elements amplify in evolutionary waves, leading to their widespread presence and divergence within genomes.

Purpose of the Study:

  • To summarize the amplification dynamics of mobile genetic elements in eukaryotic genomes.
  • To highlight the impact of retroelements on genome structure and function.
  • To discuss the ongoing research into the mechanisms and consequences of retroelement amplification.

Main Methods:

  • Analysis of genomic composition and mobile element distribution.

Related Experiment Videos

  • Review of evolutionary patterns of retroelement insertion and divergence.
  • Examination of the functional and disease-related impacts of active retroelements like L1 and Alu.

    • Main Results:

    • Retroelement amplification has resulted in a substantial portion of eukaryotic genomes consisting of non-coding DNA.
    • In humans, retroelements constitute nearly half of the genome, with L1 and Alu elements being actively amplified and contributing to disease.
    • Retroelement insertion can cause direct genomic damage and influence recombination and gene expression.

    Conclusions:

    • Retroelement amplification is a significant evolutionary process shaping eukaryotic genomes.
    • Active retroelements like L1 and Alu have profound effects on genome integrity and human health.
    • Further research is needed to fully elucidate the mechanisms and long-term consequences of retroelement proliferation.