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Pure substances consist of only one type of matter. A pure substance can be an element or a compound. An element consists of only one type of atom, while a compound consists of two or more types of atoms held together by a chemical bond.
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Identifying co-opted transposable elements using comparative epigenomics.

David Venuto1, Guillaume Bourque1,2,3

  • 1Department of Human Genetics, McGill University, Montréal, H3A 1B1, Québec, Canada.

Development, Growth & Differentiation
|January 25, 2018
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Summary
This summary is machine-generated.

Transposable elements (TEs) comprise over half of the human genome. New epigenomic methods are crucial for understanding their regulatory roles and contribution to the functional genome.

Keywords:
comparative epigenomicsepigeneticsfunctional genomegenomicstransposable elements

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Area of Science:

  • Genomics
  • Epigenetics
  • Molecular Biology

Background:

  • The human genome exhibits diverse epigenomic landscapes crucial for cell identity and disease.
  • Large-scale projects like ENCODE and IHEC have generated reference epigenomic maps.
  • Significant portions of the human genome are biochemically active, yet only a small fraction shows purifying selection.

Purpose of the Study:

  • To investigate the contribution of transposable elements (TEs) to the functional human genome.
  • To explore how TEs are co-opted for regulatory functions within the host genome.
  • To identify novel methods for distinguishing functional TEs from non-functional genomic elements.

Main Methods:

  • Comparative epigenomic analysis.
  • Analysis of existing epigenomic datasets from ENCODE, NIH Roadmap, and IHEC.
  • Evaluation of transposable element activity and regulatory potential.

Main Results:

  • Transposable elements (TEs) constitute at least 50% of the human genome.
  • Approximately 80% of human DNA shows biochemical activity, while only ~10% is under purifying selection.
  • TEs can be actively transcribed and function as regulatory elements.

Conclusions:

  • Comparative epigenomic approaches are essential for identifying co-opted transposable elements.
  • Understanding TE regulation is key to defining the functional genome.
  • Distinguishing functional TEs requires advanced epigenomic analysis beyond traditional methods.