IDR2D

IDR2D identifies reproducible chromatin interactions across experimental replicates from assays such as ChIA-PET, HiChIP, and Hi-C to distinguish biologically consistent interactions from experimental artifacts.

Key Features:

• Reproducibility Assessment: Evaluates chromatin interaction calls across independent replicates to identify interactions consistently observed between experiments.
• Artifact Elimination: Filters spurious or non-reproducible interactions inherent to single-experiment analyses to produce a more reliable interaction set.
• Statistical Framework: Extends the Irreproducible Discovery Rate (IDR) methodology to two-dimensional interaction data to estimate reproducibility and control false discovery rates.
• Assay Compatibility: Applies to chromatin interaction datasets generated by ChIA-PET, HiChIP, and Hi-C assays.

Scientific Applications:

• Chromatin Architecture: Identifying reproducible contacts to study three-dimensional genome organization.
• Gene Regulation Mechanisms: Determining consistent promoter–enhancer and other regulatory interactions that influence transcriptional activity.
• Comparative Genomics: Comparing reproducible interaction sets across cell types or conditions to find conserved or condition-specific features.

Methodology:

Applies a two-dimensional extension of the Irreproducible Discovery Rate (IDR) statistical framework to pairwise chromatin interaction calls across replicates to estimate reproducibility and control false discovery rates.