esATAC

esATAC provides integrated analysis of ATAC-seq data for genome-wide characterization of chromatin accessibility and downstream regulatory analyses.

Key Features:

• Integrated workflow: Performs end-to-end ATAC-seq analyses including quality control, peak calling, enrichment analysis, and transcription factor footprinting.
• Raw data processing: Preprocesses FASTQ files for downstream analysis.
• Reads alignment and formats: Supports alignment via Rbowtie2 and operations on aligned reads in SAM, BAM, and BED formats.
• Peak calling: Implements peak calling with F-seq to identify regions of open chromatin.
• Genome annotation and downstream analyses: Facilitates motif discovery, Gene Ontology (GO) analysis, and SNP analysis.
• Quality control: Generates quality control reports to assess data reliability.
• Statistical and enrichment analysis: Includes advanced statistical analyses and enrichment analysis for regulatory interpretation.
• Implementation: Provided as an R/Bioconductor package with implementations in R and C++.

Scientific Applications:

• Chromatin accessibility profiling: Supports genome-wide studies of chromatin accessibility using ATAC-seq data.
• Regulatory element and transcription factor analysis: Enables identification and characterization of regulatory elements and transcription factor binding sites via peak calling, motif discovery, and footprinting.
• Epigenetics and variant analysis: Facilitates investigation of epigenetic modifications and SNP-associated differences in accessibility.

Methodology:

Computational steps explicitly include preprocessing of FASTQ files, read alignment (e.g., via Rbowtie2), operations on SAM/BAM/BED files, peak calling with F-seq, motif discovery, Gene Ontology (GO) analysis, SNP analysis, transcription factor footprinting, enrichment and advanced statistical analyses, and generation of quality control reports; implemented in R and C++ as an R/Bioconductor package.