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CircleBase: an integrated resource and analysis platform for human eccDNAs.

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CircleBase is a new platform for studying extrachromosomal circular DNAs (eccDNAs). It helps researchers identify and understand the roles of eccDNAs, particularly in cancer.

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Area of Science:

  • Genomics
  • Molecular Biology
  • Bioinformatics

Background:

  • High-throughput sequencing has revealed numerous extrachromosomal circular DNAs (eccDNAs) in the human genome.
  • Interpreting the molecular functions of eccDNAs is challenging due to difficulties in loss-of-function experiments.

Purpose of the Study:

  • To present CircleBase, an integrated resource and analysis platform for curating and interpreting eccDNAs.
  • To identify and prioritize potentially functional eccDNAs and their regulatory networks.

Main Methods:

  • CircleBase integrates sequencing data, computational predictions, and manual annotations.
  • eccDNAs are classified into six functional categories.
  • Visualization tools display eccDNA targeting and regulatory networks.
  • Functional enrichment analyses are performed.

Main Results:

  • CircleBase identifies putative functional eccDNAs across multiple cell types.
  • Cancer cell eccDNAs are enriched in oncogenic pathways (e.g., Ras, PI3K-Akt).
  • eccDNAs from healthy individuals show no significant enrichment.

Conclusions:

  • CircleBase provides a user-friendly platform for eccDNA analysis.
  • It aids in screening for functional eccDNAs and understanding their mechanisms in diseases like cancer.