ChEAP

ChEAP analyzes ChIP-exo sequencing data to generate near-single base-pair maps of protein–DNA interactions and identify binding sites and sequence motifs.

Key Features:

• End-to-end processing: Performs read trimming, alignment of raw sequencing reads, and visualization of ChIP-exo results.
• Near-single base-pair resolution: Exploits ChIP-exo data to map protein–DNA interactions with near-single base-pair precision.
• Motif search: Conducts motif searches to detect conserved binding patterns in identified sites.
• Binding-site identification: Identified 113 binding sites for the RpoN sigma factor in E. coli K-12 MG1655 as a demonstration of site discovery.
• Rapid analysis: Demonstrated processing of two raw ChIP-exo data files in 2 minutes and 25 seconds.
• Parallel processing: Supports parallel processing capabilities to scale analyses across datasets.

Scientific Applications:

• Genome-scale regulatory network mapping: Enables genome-scale studies of bacterial regulatory networks using ChIP-exo data.
• High-resolution protein–DNA interaction mapping: Facilitates precise mapping of transcription factor and sigma factor binding sites.
• Cross-organism ChIP-exo analyses: Applicable to ChIP-exo datasets from various organisms for comparative regulatory studies.

Methodology:

Performs read trimming, sequence alignment, visualization of ChIP-exo profiles, motif search, and binding-site identification.