chipmunk_chiphorde

chipmunk_chiphorde performs de novo motif discovery from ChIP-Seq data using base-specific coverage profiles and an iterative greedy optimization algorithm with bootstrapping.

Key Features:

• Iterative greedy optimization with bootstrapping: Combines greedy optimization and bootstrapping to iteratively refine motif models and increase robustness.
• Coverage-profile positional preferences: Utilizes base-specific coverage values from ChIP-Seq segments as positional preferences for motif localization.
• Support for long DNA segments without truncation: Processes full-length DNA segments and accommodates datasets with tens of thousands of sequences.
• Comparative performance versus MEME and HMS: Identifies correct motifs with equal or superior quality while operating at substantially higher speed in comparative studies.

Scientific Applications:

• Transcription factor binding site discovery: De novo identification of transcription factor motifs from ChIP-Seq peak regions.
• Histone modification motif analysis: Extraction of sequence motifs associated with histone modification ChIP-Seq signals.
• Regulatory element characterization: Detection of sequence motifs contributing to gene regulation from ChIP-Seq coverage profiles.

Methodology:

Iterative algorithm combining greedy optimization with bootstrapping; utilization of base-specific coverage profiles as motif positional preferences; processing of full-length DNA segments without truncation.