The Encyclopedia of DNA Elements

Area of Science:

• Genomics
• Molecular Biology
• Epigenetics

Background:

• The human genome's regulatory mechanisms are complex and not fully understood.
• Previous efforts have mapped some aspects of genome function, but a comprehensive resource was lacking.

Purpose of the Study:

• To create a comprehensive reference map of genome function, focusing on gene regulation.
• To catalog gene regulatory elements, genes, transcripts, and their interactions.
• To provide a framework for understanding human and mouse biology at the genomic level.

Main Methods:

• Conducted over 16,000 genome-wide experiments, primarily in primary cells and tissues.
• Utilized DNase I hypersensitive sites, chromatin states, transcription factor occupancy, and nascent transcription mapping.
• Employed high-resolution mapping of physical and functional interactions between regulatory elements and genes.

Main Results:

• Cataloged 5.3 million regulatory DNA sites, identified novel long noncoding RNAs and transcript isoforms, and mapped transcript stability.
• Revealed a vast network of interactions linking regulatory elements to gene expression across numerous cell types.
• Generated parallel datasets for mouse postnatal development, enabling comparative genomics.

Conclusions:

• The ENCODE project offers a foundational framework for genome-focused research.
• This resource significantly advances the understanding of gene regulation in humans and mice.
• ENCODE facilitates studies on the functional consequences of genetic variants on regulatory elements.