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Genome-wide Analysis using ChIP to Identify Isoform-specific Gene Targets
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Genome-wide enhancer annotations differ significantly in genomic distribution, evolution, and function.

Mary Lauren Benton1, Sai Charan Talipineni2, Dennis Kostka3,4

  • 1Department of Biomedical Informatics, Vanderbilt University, Nashville, TN, 37235, USA.

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|June 22, 2019
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Summary
This summary is machine-generated.

Different methods for identifying gene enhancers yield varying results, impacting genetic studies. No single enhancer identification strategy is universally recommended due to significant dissimilarities in identified elements.

Keywords:
Cis-regulatory elementsEnhancer identificationGene regulation

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Area of Science:

  • Genomics
  • Molecular Biology
  • Genetics

Background:

  • Non-coding gene regulatory enhancers are crucial for mammalian cell transcription.
  • Numerous experimental and computational methods exist to identify cis-regulatory enhancer sequences.
  • The concordance of enhancers identified by different methods remains unevaluated.

Purpose of the Study:

  • To comprehensively evaluate the concordance of enhancer sets identified by eleven representative strategies.
  • To assess the impact of method variation on enhancer identification across four biological contexts.

Main Methods:

  • Comparison of enhancer sets from eleven distinct identification strategies.
  • Analysis across four diverse biological contexts.
  • Evaluation of genomic, evolutionary, and functional characteristics of identified enhancers.

Main Results:

  • All evaluated enhancer sets showed significant overlap beyond chance.
  • Substantial dissimilarity was observed in genomic, evolutionary, and functional characteristics.
  • Method disagreement can influence Genome-Wide Association Studies (GWAS) SNP interpretation and disease mechanism conclusions.
  • Most regions were supported by only one method, with limited evidence for superiority of multi-method supported regions.

Conclusions:

  • The study highlights the complexity of enhancer biology and challenges in mapping complex disease genetic architecture.
  • A deeper understanding of how diverse enhancer identification strategies relate to dynamic gene regulatory activity is necessary.
  • Robust and reproducible results require greater appreciation of the relationships between identification methods and enhancer function.