CompleteMOTIFs: DNA motif discovery platform for transcription factor binding experiments.

Area of Science:

• Genomics
• Molecular Biology
• Bioinformatics

Background:

• High-throughput chromatin immunoprecipitation (ChIP-seq) experiments generate large datasets for studying transcription factor binding.
• Identifying overrepresented transcription factor binding motifs is crucial for understanding gene regulation.
• Existing tools may lack comprehensive features for systematic motif discovery and analysis.

Purpose of the Study:

• To develop an integrated web tool, CompleteMOTIFs (cMOTIFs), for systematic discovery of transcription factor binding motifs.
• To enable focused de novo motif discovery using comprehensive annotations and Boolean logic operations on peak locations.
• To incorporate scanning for known motifs and perform enrichment tests for improved results.

Main Methods:

• Utilizing tools like MEME, Weeder, and ChIPMunk for de novo motif discovery.
• Integrating comprehensive annotations and Boolean logic operations for peak location analysis.
• Incorporating a scanning tool for known motifs from TRANSFAC and JASPAR databases.
• Performing enrichment tests with local or precalculated background models.

Main Results:

• Demonstrated the utility of the cMOTIFs pipeline in identifying overrepresented transcription factor binding motifs.
• Showcased the ability to focus on specific genomic regions of interest for motif discovery.
• Validated the improvement in motif scanning results through enrichment tests.
• Provided evidence of cooperative binding of multiple transcription factors upstream of stem cell differentiation regulators.

Conclusions:

• CompleteMOTIFs (cMOTIFs) is an effective integrated web tool for systematic transcription factor binding motif discovery.
• The tool facilitates focused analysis of ChIP-seq data, enhancing de novo motif discovery.
• cMOTIFs aids in understanding complex regulatory mechanisms, such as cooperative transcription factor binding in stem cell differentiation.