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Genomic context analysis reveals dense interaction network between vertebrate ultraconserved non-coding elements.

Slavica Dimitrieva1, Philipp Bucher

  • 1Swiss Institute for Experimental Cancer Research (ISREC), School of Life Sciences, Swiss Federal Institute of Technology (EPFL), Lausanne, Switzerland.

Bioinformatics (Oxford, England)
|September 11, 2012
PubMed
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Genomic context analysis reveals that ultraconserved non-coding elements (UCNEs) within gene regulatory blocks (GRBs) are retained together after whole-genome duplication. This suggests cooperative function and explains their extreme conservation.

Area of Science:

  • Genomics
  • Evolutionary Biology
  • Bioinformatics

Background:

  • Genomic context analysis, or phylogenetic profiling, typically infers protein interactions but is underutilized for non-coding DNA.
  • Ultraconserved non-coding elements (UCNEs) form gene regulatory blocks (GRBs) around developmental genes, with their function and conservation poorly understood.

Purpose of the Study:

  • To investigate the applicability of genomic context analysis to UCNEs within GRBs.
  • To explore the evolutionary fate of GRBs and their associated UCNEs following whole-genome duplication events.

Main Methods:

  • Applied a specialized genomic context analysis to five fish genomes.
  • Examined the retention patterns of GRBs and their constituent UCNEs after whole-genome duplication.

Related Experiment Videos

Main Results:

  • UCNEs within GRBs were predominantly retained as intact blocks post-duplication.
  • Target genes were often duplicated, with one copy frequently lacking UCNEs.
  • Observed a 'winner-takes-all' pattern indicating cooperative UCNE function.

Conclusions:

  • UCNEs within GRBs exhibit cooperative functionality.
  • The high degree of sequence conservation in UCNEs is likely due to extensive interactions among them.